JAMB UTME - Computer Studies - 2022

he rules that govern the structure of a command or programming language is called

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The rules that govern the structure of a command or programming language is called Syntax. Syntax determines the proper order and format of the elements that make up a command or program, such as keywords, variables, and operators. These rules must be followed precisely to create a functioning program. Syntax errors occur when these rules are not followed, and the program will not execute properly. So, in summary, Syntax is a set of rules that define the correct structure and formatting of a command or programming language.

Firefox is an example of __________

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Firefox is an example of application software. Application software is any computer program designed to perform specific tasks or provide a specific functionality to the user. It is created to help the user with various tasks such as creating documents, browsing the internet, editing photos and videos, or playing games. Application software is generally designed to be easy to use and is intended for non-technical users. Firefox is a web browser that allows users to browse the internet, access web content, and perform various online tasks. It is a standalone software application that is installed on a computer or mobile device and is used to perform a specific function. Therefore, Firefox is an example of application software.

Which of the listed is not a type of computer application?

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"Joy stick" is not a type of computer application. A computer application, also known as an application or app, is a program that runs on a computer and provides a specific set of functions for the user to perform. Examples of computer applications include Microsoft Word for word processing, Firefox for web browsing, and VLC media player for playing audio and video files. A joy stick, on the other hand, is a device used to control movement in computer games or simulations. It typically consists of a stick that can be moved in different directions to control the movement of an object on the screen. Joy sticks are not considered applications because they do not provide specific functions like a word processor or media player, but rather serve as input devices for other applications.

.......... provides total solutions to reduce data redundancy, inconsistency, dependence and unauthorized access of data

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A DBMS (Database Management System) provides comprehensive solutions to reduce data redundancy, inconsistency, dependence, and unauthorized access of data. Data redundancy refers to the duplication of data in a database, which can lead to inconsistencies and take up unnecessary storage space. A DBMS helps to eliminate data redundancy by ensuring that each piece of data is stored only once and is consistently maintained. Data inconsistency refers to the occurrence of conflicting data in a database, which can lead to problems when trying to make decisions based on the data. A DBMS helps to maintain data consistency by enforcing constraints and rules that ensure that data is entered consistently and accurately. Data dependence refers to the relationship between different pieces of data in a database. A DBMS helps to reduce data dependence by allowing data to be stored in separate tables and establishing relationships between those tables. This reduces the risk of changes in one table affecting the data in another table. Finally, a DBMS provides security features to prevent unauthorized access to the data stored in the database. This includes controlling access to the database through user authentication and authorization, as well as ensuring that sensitive data is encrypted to protect it from being accessed by unauthorized individuals. In short, a DBMS provides a centralized and organized way to store, manage, and secure data to ensure its accuracy, consistency, and security.

Which of the following is not a stage of system development cycle?

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The stage of system development cycle that is not commonly considered is "Observation". The typical stages of the system development cycle are planning, analysis, design, implementation, and testing. During the planning stage, the requirements and objectives of the system are identified. In the analysis stage, the requirements are studied in detail, and the feasibility of the system is determined. The design stage involves creating a blueprint for the system, including its architecture, interfaces, and data structures. During implementation, the system is built and the design is turned into a working system. Testing involves checking the system's performance and identifying any errors or bugs that need to be fixed. Observation is not usually considered a distinct stage in the system development cycle, but it can be seen as a part of testing or implementation. Observation involves monitoring the system after it has been implemented to ensure that it is working as intended and to identify any issues that need to be addressed.

What is the full form of UDP?

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The full form of UDP is User Datagram Protocol. It is a communication protocol used for sending and receiving data over the internet. UDP is a lightweight, connectionless protocol that operates at the Transport layer of the Internet Protocol (IP) suite. Unlike TCP (Transmission Control Protocol), which guarantees delivery of data, UDP does not provide any guarantees regarding delivery or sequencing of packets. Instead, UDP is often used for applications that require faster data transfer, such as video streaming or online gaming, where small amounts of lost data are acceptable. The "User Datagram" part of the name refers to the fact that UDP sends data in the form of datagrams, which are discrete chunks of data that are sent as individual packets. The "Protocol" part of the name indicates that UDP is a set of rules and procedures that govern how data is transmitted and received over a network. In summary, UDP is a fast and lightweight protocol used for sending data over the internet. Its name reflects the fact that it operates using datagrams and is a protocol for communication.

A display listing of program options which users can select is called?

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A display listing of program options which users can select is called a menu. A menu is a list of options or choices that are presented to the user within a software program or an operating system. The user can then select one of the options from the menu to perform a specific task or access a specific feature. The menu is typically displayed as a list of text items or sometimes as a list of icons.

Which of the following is an example of output device

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The example of an output device is a speaker. An output device is any device that receives information or data from a computer or electronic device and presents or displays it to the user in a perceivable format. In the case of a speaker, it receives sound data from a computer or electronic device and produces audible sound waves that can be heard by the user. Speakers are commonly used to play music, watch videos or movies, and listen to audio from video games. On the other hand, a keyboard and mouse are examples of input devices because they allow the user to input data or commands into a computer or electronic device. Similarly, a microphone is also an input device as it converts sound waves into electrical signals that can be processed by a computer or electronic device.

Word processor, spreadsheets, database, graphics and presentation software are all examples of?

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Word processor, spreadsheets, database, graphics and presentation software are all examples of application packages. Application packages are software programs designed to perform specific tasks or functions for the user. They are also known as "applications" or "apps" for short. Each of the software examples mentioned - word processor, spreadsheets, database, graphics, and presentation software - have a specific function and are designed to make tasks related to those functions easier for the user. For instance, a word processor is designed to create, edit and format text documents, while a spreadsheet program is designed to perform calculations and data analysis. Database software is designed to store, organize and retrieve large amounts of data, while graphics software is designed to create and edit visual elements such as images and videos. Presentation software is designed to create slideshows and presentations. Overall, application packages are a type of software that provides users with specific tools to perform tasks more efficiently and effectively.

___________________ is a program meant to be sent from one computer to another across the world wide Web.

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Which of these is not a job of the operating system

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The job of the operating system that is not listed among the options is "Handling HTTP requests for Web pages." The operating system is the most important software that runs on a computer, providing an interface between the user and the computer hardware. It performs various functions to ensure that the computer system operates smoothly and efficiently. One of the key jobs of the operating system is to manage the computer's resources, such as allocating memory to programs that are running on the computer. The operating system is responsible for managing the computer's memory, ensuring that each program has enough memory to run efficiently, and preventing one program from using another program's memory. Another important job of the operating system is to provide security by preventing unauthorised access to files and data on the computer. It controls access to the computer's resources and ensures that only authorised users have access to the files and data that belong to them. However, handling HTTP requests for web pages is not a job of the operating system. Instead, this task is handled by web servers that run on top of the operating system. Web servers receive requests from clients, such as web browsers, and serve web pages to them over the internet. In summary, while the operating system performs many important tasks, such as managing resources and providing security, handling HTTP requests for web pages is not one of its jobs.

he binary system has the radix of ________

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The binary system has a radix of 2. The radix of a number system is the number of unique digits used in that system. For example, in the decimal system (base 10), the radix is 10, because we use 10 unique digits (0 to 9) to represent numbers. In the binary system (base 2), the radix is 2, because we only use 2 unique digits: 0 and 1. This means that every number can be represented as a combination of only 0s and 1s in the binary system.

A 2-input gate that can be used to pass a digital waveform unchanged at certain times and inverted at other times is ___________

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The 2-input gate that can be used to pass a digital waveform unchanged at certain times and inverted at other times is the XOR (exclusive OR) gate. An XOR gate has two input signals and one output signal. The output is HIGH (1) if the two input signals are different, and LOW (0) if the two input signals are the same. In other words, an XOR gate produces an output signal that is the "exclusive or" of its two input signals. When one of the input signals is held at a constant logic level (either HIGH or LOW), the XOR gate can be used to pass the other input signal unchanged or inverted, depending on the value of the constant signal. If the constant signal is HIGH, the output signal will be inverted; if the constant signal is LOW, the output signal will be unchanged. This property of the XOR gate makes it useful in digital electronics for a variety of applications, such as data encryption, error detection and correction, and clock synchronization.

A half byte is known as ________.

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A half byte is known as a nibble. A byte is a unit of digital information in computing, typically consisting of 8 bits. A nibble, on the other hand, is half of a byte, consisting of 4 bits. This unit is often used in computer architecture and data representation, especially when referring to memory addresses or data manipulation.

What is the full form of TCP?

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The full form of TCP is Transmission Control Protocol. TCP is a communication protocol that is used to send and receive data over the internet. It is one of the main protocols in the Internet Protocol Suite (commonly referred to as TCP/IP), which is the set of rules and standards that govern how data is transmitted on the internet. TCP provides a reliable, ordered, and error-checked delivery of data between applications running on different devices. It breaks down the data into small packets, and each packet is numbered and tracked to ensure that it arrives at its destination in the correct order and without errors. If a packet is lost or damaged during transmission, TCP detects the error and retransmits the missing or damaged packet. TCP is widely used for sending and receiving data between web servers and web browsers, and for many other applications that require reliable and error-free data transmission over the internet.

Which of the memories must be refreshed many times per second?

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Out of the given options, Dynamic RAM (DRAM) must be refreshed many times per second. DRAM is a type of computer memory that stores data in a capacitor within each memory cell. The capacitor can hold a charge, representing either a 0 or 1, but it gradually leaks over time, meaning that the data will eventually fade away. To prevent this data loss, the memory controller sends a refresh command to the DRAM chip many times per second. This refresh command recharges the capacitors in the memory cells to maintain the data stored in them. In contrast, Static RAM (SRAM) does not require refreshing, as it uses a different type of storage element that does not leak charge like a capacitor. EPROM and ROM are non-volatile memory types, meaning that they retain data even without power, and do not require refreshing.

In general, a file is basically a collection of all related______.

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In general, a file is basically a collection of all related "records". A record is a collection of related data items that are grouped together and treated as a single unit. For example, in a student record file, each record may contain data related to a single student, such as their name, ID number, and grades. Each record may consist of several "fields", which are individual pieces of data that are related to the record. For example, in a student record, a field might be the student's name, another field might be their date of birth, and another field might be their address. So, in summary, a file is a collection of related records, and each record contains multiple fields that are related to the record.

Fire fox is an example of __________

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Firefox is an example of application software. Application software is a type of software that is designed to perform specific tasks for the user, such as creating documents, browsing the web, sending emails, etc. In other words, it is a program that is used to accomplish specific tasks and is meant to be used by the end-user, as opposed to system software, which is designed to run the computer itself and support the application software. Firefox is a web browser, which is a type of application software that allows users to access, browse and interact with websites on the Internet.

What is the shortcut key to "undo" last action on a Microsoft word page?

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The shortcut key to "undo" the last action on a Microsoft Word page is "Ctrl + Z". When you perform an action on a Word page, such as typing, deleting, formatting or copying text, you can undo that action by using the "Ctrl + Z" keyboard shortcut. This will revert the page to the state it was in before the action was performed. For example, if you accidentally delete a sentence, you can press "Ctrl + Z" to undo the deletion and restore the sentence. The "Ctrl + Z" shortcut is a very useful and commonly used feature in Microsoft Word as it allows you to quickly correct mistakes without having to manually undo each action. It can be used multiple times to undo several actions in a row. If you want to redo an action that was previously undone, you can use the "Ctrl + Y" keyboard shortcut. In summary, the "Ctrl + Z" keyboard shortcut is used to undo the last action performed on a Microsoft Word page, allowing you to easily correct mistakes and restore the previous state of the page.

The major function of a Database management system is _______________

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The major function of a Database Management System (DBMS) is to efficiently store and manage large amounts of data in a structured manner, making it easy to retrieve, update, and manipulate the data as needed. A DBMS provides a centralized location for storing and organizing data, allowing multiple users to access and modify the data simultaneously while ensuring data integrity and security. In addition, a DBMS provides tools for defining and enforcing data relationships, constraints, and rules, ensuring data consistency and accuracy. It also provides a query language for retrieving data from the database and generating reports. Overall, the primary goal of a DBMS is to make it easy for users to interact with large amounts of data in a way that is efficient, secure, and reliable.

Which of the following is termed as the minimum error code?

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Gray codes are less error-prone because they only change in one-bit position at a time. Hence, they are considered as the minimum error code.

Total types of data that can be read by document reader are

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Document readers are devices or software programs that can analyze and interpret written or printed text on a document. These devices can read different types of data from documents such as marks, handwritten and printed characters, and printed lines. Marks can include things like checkmarks or ticks that people might use to indicate a selection on a form or questionnaire. Handwritten characters are any letters, numbers or symbols that are written by hand, whereas printed characters are those that are produced by a printer. Printed lines refer to the lines of text that are printed on a page. Therefore, the correct answer is "all of the above" as document readers can read all of these types of data from documents.

Which process is used by large retailers to study trends?

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Large retailers use data mining to study trends. Data mining is the process of analyzing large amounts of data and identifying patterns and trends in that data to make informed decisions. This can involve looking at customer behavior, sales data, market trends, and other types of data to gain insights into what products are popular, what customers are looking for, and how the market is changing. The goal of data mining is to help retailers make informed decisions about their business and stay ahead of the competition.

The combination of the arithmetic and logic units, as well as the ______________ unit makes up the central processing unit.

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The combination of the arithmetic and logic units, as well as the control unit makes up the central processing unit (CPU). A CPU is the "brain" of a computer. It is responsible for executing instructions and performing calculations. The arithmetic and logic units (ALU) are the parts of the CPU that perform mathematical operations, such as addition, subtraction, multiplication, and division, as well as logical operations, such as AND, OR, and NOT. The control unit is responsible for controlling the flow of data and instructions within the CPU and between the CPU and other parts of the computer, such as memory and input/output devices. It fetches instructions from memory, decodes them to determine what operation to perform, and then directs the ALU to perform the operation. In summary, the combination of the ALU and control unit makes up the CPU, which is responsible for processing data and instructions and performing calculations in a computer.

Which doesn't belong to the group?

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The option that does not belong to the group is "External memory". Primary memory, main memory, and internal memory are all types of memory that are directly accessible by the CPU (Central Processing Unit) of a computer. These types of memory are volatile, which means that they lose their data when the power is turned off. Primary memory is the smallest and fastest type of memory in a computer, and it includes the cache and registers. Main memory, also known as RAM (Random Access Memory), is the largest type of primary memory in a computer and holds the data and instructions that the CPU needs to access quickly. Internal memory refers to the storage capacity that is built into a device, such as a hard drive or a solid-state drive (SSD). This type of memory is non-volatile, which means that it retains its data even when the power is turned off. External memory, on the other hand, refers to any type of storage that is external to the device, such as a USB flash drive, an external hard drive, or a cloud-based storage service. While external memory can be used to store data, it is not considered to be a type of primary or internal memory because it is not directly accessible by the CPU. Instead, data must be transferred between external memory and primary or internal memory before it can be accessed by the CPU.

What differs a system software from application software?

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System software and application software are two broad categories of computer software, each with different functions and purposes. System software is a collection of programs that control and manage the basic operations of a computer system. It is designed to provide a platform for other software applications to run on. System software includes operating systems, device drivers, utilities, and other tools that enable the computer to operate and perform its functions. On the other hand, application software refers to programs that are designed to perform specific tasks or applications for the user. These programs are used for word processing, spreadsheets, photo editing, web browsing, and other specialized tasks. Application software is often created by third-party developers and can be installed and used by end-users. The main difference between system software and application software is the purpose they serve. System software is responsible for managing the hardware and providing a platform for other software to run on, while application software is designed to perform specific tasks for the user. Other differences between system software and application software include: - Ability to multi-task: System software is designed to manage and allocate system resources, while application software is designed to perform specific tasks. Therefore, system software has more multitasking capabilities than application software. - Minimal in terms of space: System software is usually larger in terms of size and requires more storage space than application software. - Presence of cache memory: System software may use cache memory to improve the performance of the computer system, while application software does not typically use cache memory. - Unique programs installed by the creators to help run the computer: System software includes programs that are installed by the computer manufacturer or operating system developer to help run the computer, such as device drivers and system utilities. Application software does not include these types of programs.

Which program translates programs to a simpler language that the computer can execute.

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The program that translates programs to a simpler language that the computer can execute is called a compiler. A compiler is a program that takes the source code of a program written in a high-level programming language and translates it into machine code or executable code that the computer can understand and execute. The process of compiling involves several steps, including lexical analysis, syntax analysis, semantic analysis, code optimization, and code generation. When a programmer writes a program in a high-level programming language such as Java or Python, the code is not directly executable by the computer. Instead, the code must be translated into machine code, which is a low-level language that the computer can understand and execute. This is where the compiler comes in. The compiler takes the source code written in the high-level programming language and converts it into machine code that can be executed by the computer. The advantage of using a compiler is that the resulting executable code is usually faster and more efficient than code interpreted by an interpreter, which we will discuss next. Additionally, since the code is already translated into machine code, it can be executed multiple times without the need for further translation, making it faster to execute. Overall, a compiler is a program that translates high-level programming code into machine code that a computer can execute, allowing programmers to write code in a more human-readable language and then have it translated into a language that the computer can understand and execute.

What does CO stand for in COBOL?

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In COBOL, CO stands for "Common Business Oriented Language". COBOL is a programming language that was designed specifically for business applications, such as finance, accounting, and payroll. COBOL was first developed in the late 1950s, and it quickly became popular in the business world because it was easy to use and understand, and it could handle large amounts of data. The "common" part of the acronym refers to the fact that COBOL was intended to be a language that could be used by a wide range of businesses, regardless of their specific industry or application. The "business-oriented" part of the acronym emphasizes the language's focus on business data and processing.

To determine if a computer has the ability to think, a test was conducted named as

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The test used to determine if a computer has the ability to think is called the Turing test. The Turing test was proposed by the mathematician and computer scientist Alan Turing as a way to determine if a machine can exhibit intelligent behavior equivalent to, or indistinguishable from, that of a human. The test involves a human evaluator who engages in a natural language conversation with a machine and a human, without knowing which is which, and tries to determine which is the machine based on their responses. If the evaluator is unable to reliably distinguish the machine from the human, the machine is said to have passed the Turing test and demonstrated human-like intelligence.

The logical structure of the database can be depicted through its ______

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The logical structure of a database can be depicted through its data model. A data model is a conceptual representation of data and the relationships between data elements in a database. It defines the structure of the database, including tables, columns, and the relationships between them. The data model can be thought of as a blueprint or a map for the database, showing how data is organized and how it can be accessed. It is an abstract representation of the database, separate from the specific software or hardware used to implement it. By using a data model, designers and developers can ensure that the database is structured in a logical and consistent way, which can improve performance, scalability, and ease of use.

What tells the computer how to use its components?

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The operating system (OS) tells the computer how to use its components. An operating system is a software program that manages the computer hardware and software resources and provides common services for computer programs. The operating system acts as an intermediary between the computer's hardware and the programs or applications that run on the computer. It is responsible for controlling and allocating memory, prioritizing system requests, ensuring security, and managing input/output operations. In short, the operating system acts as the foundation for the computer to function and allows different applications and programs to communicate with the hardware and work together.

_______ is the process of finding errors and fixing them within a program.

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The process of finding errors and fixing them within a program is called debugging. When a program is being developed, it may contain errors, also known as bugs, that prevent it from functioning properly. Debugging is the process of identifying and fixing these errors. Debugging can involve a number of techniques, such as analyzing error messages, reviewing code, and stepping through the program line by line to find where errors occur. Once an error is identified, the programmer can make changes to the code to correct the issue. Compiling is the process of translating source code into machine code, which can then be executed. Execution is the process of running a program. Scanning, in the context of programming, typically refers to the process of analyzing code for security vulnerabilities rather than identifying and fixing errors. In summary, debugging is the process of identifying and fixing errors in a program, whereas compiling, executing, and scanning are different processes that serve different purposes in the development and operation of a program.

Computers that are portable and convenient for users who travel are known as _________________

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Binary coded decimals (BCD) numbers express each digit as a ___________

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Binary coded decimals (BCD) numbers express each digit as a nibble. A nibble is a group of 4 bits, which can represent 16 distinct values (0-15). In BCD, each decimal digit is encoded using a separate nibble, where each nibble represents the binary equivalent of the digit. For example, the decimal number 123 would be represented in BCD as four nibbles: 0001 (1), 0010 (2), 0011 (3), and 0011 (3). Using a nibble to represent each digit is a simple and efficient way to encode decimal numbers in binary form. BCD is commonly used in computer systems where decimal arithmetic is required, such as in financial calculations or in control systems where numerical values need to be displayed on digital screens. In summary, BCD numbers express each decimal digit as a nibble, allowing for efficient and accurate representation of decimal numbers in binary form.

_________ are programmes that affect the effectiveness of a computer system.

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The correct answer is "bugs and viruses." Bugs are errors or defects in computer software that can cause the system to behave unexpectedly or not function properly. They can affect the efficiency and effectiveness of a computer system by slowing it down, causing crashes, or producing incorrect results. Viruses, on the other hand, are malicious software programs that can infect a computer system and cause harm. They can also affect the effectiveness of a computer system by causing it to slow down or crash, stealing personal information, or spreading to other systems. Anti-virus programs are software tools designed to detect and remove viruses from a computer system. While they can help mitigate the negative effects of viruses, they are not a complete solution and cannot prevent all types of viruses from infecting a system.

An inventory management program can assist with ________

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An inventory management program can assist with all of the above: distribution, purchasing, and planning. Inventory management involves keeping track of a company's stock of goods and materials, and making sure that there are enough items on hand to meet customer demand without having too much excess inventory that ties up capital. A good inventory management program can help with distribution by providing real-time updates on inventory levels and locations, allowing companies to quickly and accurately fulfill customer orders. It can also assist with purchasing by tracking inventory levels and alerting staff when it's time to reorder supplies, helping to ensure that stock is always available when needed. Additionally, an inventory management program can assist with planning by providing data and analytics on sales trends, inventory turnover, and other key performance indicators. This information can help companies make informed decisions about which products to stock, when to order supplies, and how much inventory to keep on hand. Overall, a well-designed inventory management program can help companies save time, reduce waste, and improve efficiency.

A collection of facts and figures is known to be _________

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The correct answer is "Data". Data refers to a collection of facts, figures, or information that can be processed or analyzed to gain insights or make informed decisions. Data can come in different forms, such as numbers, text, images, audio, or video. It can be stored in various formats, including spreadsheets, databases, documents, or files. For example, if you have a list of customer names, addresses, and phone numbers in a spreadsheet, this is considered data. If you store this information in a database, it becomes a structured collection of data that can be easily accessed and manipulated. However, whether the data is sequenced or structured depends on how it is organized, and it is not a defining characteristic of data itself.

Why is the base 10 system unique?

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The base 10 system, also known as the decimal system, is unique because it is the most widely used number system in the world and has been adopted by nearly all cultures and civilizations. The reason for this widespread usage is that it is based on the number of human fingers, with 10 being the number of digits on two hands. This made it a convenient and intuitive system for early humans to count and perform mathematical operations with. Additionally, the base 10 system allows for easy representation of numbers using only 10 symbols (0 to 9), making it simple to write, communicate, and perform mathematical operations with larger numbers.

The set of rules that defines the combination of symbols that are considered to be correctly structured statements or expressions in that language is called _________

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The set of rules that defines the combination of symbols that are considered to be correctly structured statements or expressions in a language is called Syntax. Think of syntax as the grammar of a language. Just like in English, there are certain rules that dictate what combinations of words and punctuation are considered to be a proper sentence, in programming languages there are rules that dictate what combinations of symbols and syntax are considered to be a proper statement or expression. The syntax of a language determines how code should be written in order for it to be properly understood by the computer and executed as intended.

Programming language COBOL works best for use in

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COBOL, which stands for COmmon Business Oriented Language, is a programming language that is specifically designed for commercial applications. It was developed in the 1950s for business data processing, and it remains a popular choice for applications related to finance, banking, insurance, and other industries that handle large amounts of data. COBOL is known for its straightforward syntax and ability to process large amounts of data efficiently, making it a good choice for commercial applications that need to manage and manipulate financial records, inventory, and other types of business data.