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Question 1 Report
The Internet is an example of which computer network?
Answer Details
The Internet is an example of a wide area network (WAN). A WAN is a type of computer network that covers a large geographical area, such as a city, a country, or even the entire world. The Internet is a global network of interconnected computers, servers, and other devices that communicate with each other using standardized communication protocols. It allows users to access and exchange information and resources, such as email, websites, and online services, from anywhere in the world. WANs are typically composed of multiple smaller networks, such as local area networks (LANs) and metropolitan area networks (MANs), connected together using high-speed communication links, such as satellite, cable, or telephone lines. The Internet is an example of a WAN because it spans multiple countries and continents, connecting millions of devices and users in a single network.
Question 2 Report
A tier in which the database resides along with the query processing language is called
Answer Details
The tier in which the database resides along with the query processing language is called the data tier. In software architecture, the data tier is one of the three layers of a typical multi-tier architecture, with the other two being the presentation tier (dealing with the user interface) and the application tier (containing the business logic). The data tier is responsible for managing the storage and retrieval of data, as well as the processing of queries that operate on that data. The data tier typically consists of one or more database management systems (DBMS), which are specialized software systems designed to manage large amounts of structured data. The DBMS provides a structured way to store data and a language for querying and manipulating that data, such as SQL (Structured Query Language). In summary, the data tier is the layer in a multi-tier software architecture where the database resides, and where queries are processed using a specialized query language like SQL. It is responsible for managing the storage and retrieval of data in an efficient and secure manner.
Question 3 Report
Files that maintain the hierarchical structure of the file system.
Answer Details
The correct answer is "Directories." Directories are special files that organize the hierarchical structure of the file system by grouping related files together into named collections. They act like folders, allowing users to easily locate and access the files they need. Each directory can contain other directories (sub-directories) and files. For example, in a Windows system, the "C:\Users" directory contains a sub-directory for each user account on the computer, and each user account directory contains sub-directories for documents, pictures, music, etc. In short, directories allow us to maintain a structured and organized file system.
Question 4 Report
A 2-input gate that can be used to pass a digital waveform unchanged at certain times and inverted at other times is ___________
Answer Details
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.
Question 5 Report
___________________ is a program meant to be sent from one computer to another across the world wide Web.
Answer Details
Question 6 Report
The Caps key on a keyboard is used to___________
Answer Details
The Caps key on a keyboard is used to switch between upper and lower case letters. When you press the Caps key, it changes the letter case of the letters you type from lowercase to uppercase or vice versa. This means that if you type with the Caps key on, all the letters you type will appear in uppercase. Similarly, if you type with the Caps key off, all the letters you type will appear in lowercase. This feature is particularly useful when you want to emphasize certain words or phrases, such as in titles or headings. It can also be used to make your text easier to read by adding some variety to the letter case. For example, when typing a password or other sensitive information, you may want to use a combination of upper and lower case letters to make it more secure. In summary, the Caps key is used to switch between uppercase and lowercase letters in order to make text easier to read, emphasize words, or add security to sensitive information.
Question 7 Report
Hexadecimal numbers are a mixture of
Answer Details
Hexadecimal numbers are a mixture of decimal numbers and letters. The decimal number system uses 10 digits, 0 through 9, to represent all numbers. The hexadecimal number system uses 16 symbols, 0 through 9 and the letters A through F, to represent numbers. These letters are used to represent the values 10 through 15, respectively. This makes hexadecimal a convenient way to represent binary data in a compact form, since each hexadecimal digit represents 4 binary digits.
Question 8 Report
Internet explorer is used for
Answer Details
Internet Explorer is a web browser that is used to view web pages on the internet. It allows users to access different websites and view the content on those sites, such as text, images, videos, and other media. Internet Explorer is designed to make it easy for users to navigate the internet by providing tools such as search bars, bookmarks, and tabs. While it may be possible to play movies or music within Internet Explorer, its primary purpose is to browse the internet and display web pages.
Question 9 Report
The java interpreter translates a java program from ____________ to machine language.
Answer Details
The Java interpreter translates a Java program from its original form, which is a high-level programming language, into a special type of code called "bytecode." Bytecode is a low-level code that is specific to the Java Virtual Machine (JVM), which is a software layer that sits between the Java program and the computer's hardware. When a Java program is compiled, it is translated into bytecode rather than machine language. Bytecode is a form of binary code that is designed to be portable across different platforms, meaning that it can run on any computer that has a JVM installed, regardless of the specific hardware or operating system. So, to summarize, the Java interpreter translates a Java program from a high-level programming language into bytecode, which is a low-level binary code that is specific to the JVM. The bytecode can then be executed by the JVM on any computer that has it installed.
Question 10 Report
Sensitive data can be protected from prying eyes using _________
Answer Details
Sensitive data can be protected from prying eyes using encryption. Encryption is the process of converting data into a code or a form that cannot be easily understood without a special key or password. When data is encrypted, it is scrambled and transformed into a form that is not easily recognizable. The only way to unlock or decrypt the data is to have the specific key or password that was used to encrypt it. This means that even if someone gains unauthorized access to the encrypted data, they will not be able to read or understand it without the key or password. Encryption can be applied to many types of sensitive data, including passwords, financial information, personal data, and sensitive documents. It can be used to protect data both while it is being transmitted (e.g., through email or messaging) and while it is being stored (e.g., on a computer or server). In summary, encryption is a powerful tool for protecting sensitive data from prying eyes, by converting it into a code or a form that is not easily recognizable without the specific key or password that was used to encrypt it.
Question 11 Report
Which part of a processor contains the hard ware necessary to perform all the operations required by a computer?
Answer Details
The part of a processor that contains the hardware necessary to perform all the operations required by a computer is the "Data path". The data path, also known as the "Arithmetic Logic Unit" (ALU), is a component of the processor that performs arithmetic and logical operations on data. It is responsible for carrying out the instructions of the computer program, performing calculations, and manipulating data. The controller, registers, and cache are also important components of a processor, but they do not contain the hardware necessary to perform all the operations required by a computer. The controller, also known as the "Control Unit", is responsible for directing the flow of data and instructions within the processor, as well as between the processor and other components of the computer. Registers are high-speed storage locations within the processor that store data temporarily for processing. Cache is a small amount of high-speed memory that stores frequently used data and instructions, making them quickly accessible to the processor. Therefore, out of the given options, the data path or ALU is the part of the processor that contains the hardware necessary to perform all the operations required by a computer.
Question 12 Report
The process of feeding instructions into the computer system is called
Answer Details
The process of feeding instructions into a computer system is called "inputting." It involves providing data, commands, or other types of information to a computer system so that it can process and execute the instructions. When you input data or commands into a computer system, you typically use an input device such as a keyboard, mouse, or microphone to provide the information. The computer then processes the input data using its internal logic and algorithms, and generates an output based on the instructions it received. For example, when you type a document using a keyboard and input the data into a word processing software, the computer processes the text and generates an output in the form of a document that you can save, print, or share. In summary, inputting is the process of providing information or instructions to a computer system, which is then processed and executed by the computer to generate an output.
Question 13 Report
The end users are able to operate at the _______ tier.
Answer Details
End users are able to operate at the "presentation" tier. The presentation tier is the user interface layer of a software application or system. It's the part of the system that the end user interacts with directly, and it includes all the components that allow the user to view and manipulate data. This can include things like graphical user interfaces, web pages, and other visual elements that the user can see and interact with. Because the presentation tier is designed specifically for end users, it's the layer that they are most comfortable operating in. This is where they can view data, input information, and interact with the system to achieve their desired tasks. While there may be other tiers (such as the model, application, and data tiers) that are responsible for processing and managing data behind the scenes, it's the presentation tier where the end user has the most control and where their actions have the most direct impact on the system.
Question 14 Report
For what does WAN stand?
Answer Details
WAN stands for Wide Area Network. A network is a collection of devices (like computers, printers, and servers) that are connected together to communicate and share resources. A WAN is a type of network that covers a large geographic area, such as a city, a country, or even the whole world. Unlike a Local Area Network (LAN), which is limited to a small area like a home or office building, a WAN connects devices over a larger distance using a variety of technologies such as telephone lines, fiber optic cables, and satellite links. WANs are used by organizations to connect their different offices and branches in different locations, and to provide access to the internet or cloud-based services. For example, a company with offices in New York and London might use a WAN to connect the two locations and allow employees to share data and resources.
Question 15 Report
Numerous files are referred to as _____________
Answer Details
Numerous files are referred to as "files". A file is a collection of data or information that is stored on a computer or other electronic device. Files can come in many different formats, such as documents, images, music, and videos. They are used to store information that can be easily accessed, edited, and shared. For example, a word processing document is a type of file that can be used to write and edit text, while an image file can be used to store and display photos. Files are often organized into folders, which are like virtual folders or directories that help you keep your files organized and easily accessible. You can create folders, move files between folders, and even rename or delete files and folders.
Question 16 Report
Why is the base 10 system unique?
Answer Details
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.
Question 17 Report
What is the etiquette one should follow while working online?
Answer Details
Working online requires proper etiquette or "netiquette" to maintain a positive and professional atmosphere. Here are some general guidelines to follow: 1. Be respectful: Always communicate in a respectful manner. Avoid using harsh or offensive language, and be mindful of cultural differences. 2. Be mindful of your tone: It's important to communicate in a tone that's appropriate for the situation. If you're sending an email or message, make sure the tone is professional. 3. Be punctual: Time management is key. Be punctual when it comes to meetings and deadlines. 4. Be organized: Keep your digital files organized and ensure that you're using appropriate naming conventions. This will make it easier for others to find what they need. 5. Be secure: Protect your digital assets by using strong passwords and secure file sharing methods. 6. Respect privacy: Be mindful of other people's privacy, including their personal information and confidential data. 7. Be mindful of online piracy: Do not engage in any form of online piracy, including sharing copyrighted materials without permission. Remember, the online world is just as important as the physical one. Maintaining proper netiquette can help you build a positive and professional reputation, and make you more successful in your online endeavors.
Question 18 Report
Computer applications are example of ___________
Answer Details
Computer applications are an example of software. Software refers to the programs, data, and instructions that tell a computer what to do and how to do it. Computer applications are specific types of software that are designed to perform particular tasks or solve particular problems. Examples of computer applications include web browsers, word processors, email clients, and games. Computer applications are different from computer hardware, which refers to the physical components of a computer, such as the processor, memory, and storage devices. Computer utilities and program packages are different types of software that can be used to manage and maintain a computer system, but they are not the same as computer applications, which are designed for specific tasks and are often used by end-users. In summary, computer applications are a type of software, which refers to the programs, data, and instructions that tell a computer what to do and how to do it. Computer applications are designed to perform specific tasks or solve specific problems, and examples include web browsers, word processors, email clients, and games.
Question 19 Report
Which of the following is a computer not used for?
Answer Details
A computer can be used for entertainment, information, and social media, so the answer is "none of the above". Computers are versatile machines that can perform a wide variety of tasks, including playing games, streaming videos, accessing news and other information, and connecting with others on social media platforms. While some computers may be designed or optimized for certain types of tasks, such as gaming or video editing, all computers are capable of handling entertainment, information, and social media to some extent. Therefore, the answer to this question is that there is no option that describes something a computer cannot be used for among the given choices.
Question 20 Report
Which can be the input and output devices both?
Answer Details
There are some devices that can be used as both input and output devices. These are: 1. Touch screen monitor: A touch screen monitor can be used as both an input and output device. It can display information to the user and also accept input from them through touch. 2. Digitizer: A digitizer is another device that can act as both an input and output device. It is used to convert analog signals, such as handwriting or sketches, into digital form. It can also display the digital output on a screen. In contrast, devices like a scanner and speaker are typically designed to perform just one function. A scanner is primarily an input device that converts physical documents into digital images, while a speaker is an output device that produces sound. To summarize, touch screen monitors and digitizers can be used as both input and output devices, while scanners and speakers are typically limited to a single function.
Question 21 Report
Which term describes accessing files from a computer other than the one where the files are stored.
Answer Details
The term that describes accessing files from a computer other than the one where the files are stored is "remote access". Remote access means that you can access files, data or resources from a different computer or server that is located elsewhere, using a network connection like the internet. This allows you to work with files and data as if they were stored on your local computer, even though they are actually stored on a different computer or server. For example, if you are working from home and need to access files that are stored on your work computer, you can use remote access to connect to your work computer over the internet and access those files. Similarly, if you use cloud storage services like Dropbox or Google Drive, you can access your files from any computer with an internet connection, which is also a form of remote access.
Question 22 Report
Which is not a network for distribution of information?
Answer Details
Microsoft Word is not a network for the distribution of information. Microsoft Word is a word processing software that is used to create, edit, and format documents. It is not a network because it does not distribute information, it is used to create and store information on a single device or in a cloud storage service. On the other hand, cloud storage, several computers to one printer, and e-mail are all examples of networks that distribute information.
Question 23 Report
Java is a ______ language
Answer Details
Java is a high-level programming language. This means that it is designed to be easy to read and write for humans, and provides a higher level of abstraction from the hardware than lower-level languages. High-level languages like Java typically have built-in libraries and features that allow developers to write code more efficiently and focus on solving problems rather than worrying about low-level details like memory management or machine architecture. Additionally, high-level languages are typically platform-independent, which means that Java code can be compiled and run on different operating systems without needing to be rewritten.
Question 24 Report
What is debugging?
Answer Details
Debugging is the process of finding and fixing errors, also known as "bugs", in a computer program. The goal of debugging is to ensure that the program runs smoothly and produces the expected results. This involves locating the source of the problem, understanding why it is happening, and then making changes to the code to correct the issue. Debugging can be a time-consuming and challenging task, but it is an important part of the software development process to ensure that the end-users have a positive experience when using the software.
Question 25 Report
Which key deletes text?
Answer Details
The key that deletes text is the backspace key. When you type, the characters you enter are added to the right of the cursor, which shows you where the next character will be inserted. If you want to delete a character, you can move the cursor to the left of that character using the arrow keys, and then press the backspace key. This will remove the character to the left of the cursor. You can also use the backspace key to delete a selection of text. To do this, you first need to highlight the text you want to delete by clicking and dragging the cursor over it. Once the text is highlighted, you can press the backspace key to delete it. In summary, the backspace key is used to delete characters to the left of the cursor or to delete a selected portion of text.
Question 26 Report
The illegal access to a network or computer system is___________
Answer Details
The illegal access to a network or computer system is called hacking. Hacking refers to unauthorized access to a computer system or network with the intention of compromising its security and potentially causing harm. This can include stealing sensitive information, installing malicious software, or disrupting the normal functioning of the system. Hacking is illegal and can result in serious consequences for the hacker, such as fines and imprisonment. It is important for individuals and organizations to take steps to secure their networks and systems to prevent unauthorized access.
Question 27 Report
Which of the following software can't be categorized as an application software?
Answer Details
MS-DOS cannot be categorized as an application software. MS-DOS is an operating system, not an application. An operating system is the underlying software that manages and controls the hardware and software resources of a computer. An application software, on the other hand, is a program designed to perform a specific task, such as word processing, spreadsheets, or database management.
Question 28 Report
The acronym IP address has its full meaning to be _________
Answer Details
The acronym "IP address" stands for "Internet Protocol address". An IP address is a unique numerical identifier assigned to each device connected to the internet. Think of it like a phone number for your computer or other device. When you visit a website, your device sends a request to the website's IP address and then the website responds by sending the requested information back to your device's IP address. This is how devices on the internet communicate with each other.
Question 29 Report
How are the stages of SDLC implemented?
Answer Details
SDLC, or Software Development Life Cycle, is the process of developing software from the initial planning phase to the final deployment phase. The different stages of SDLC are implemented in various ways, depending on the project requirements and the development team's preferences. Let's take a look at each option: 1. Randomly, without overlapping: Implementing the stages of SDLC randomly and without overlapping is not an ideal approach as it can lead to confusion and delays. This method involves starting and completing stages without considering their interdependencies or the requirements of the subsequent stages. It can also result in rework and revisions of previous stages, causing unnecessary delays and additional costs. 2. Sequentially, without overlapping: This is the most common way of implementing the stages of SDLC. In this approach, each stage is completed sequentially, with no overlapping or parallel work being done. This method ensures that each stage is completed before moving onto the next, ensuring that all the requirements and objectives of each stage are met. It also reduces the risk of errors and makes it easier to track progress. 3. Sequentially with overlapping: In this approach, the stages of SDLC are completed sequentially, but with some overlapping. This means that the team may start work on the next stage before completing the current stage. This approach can help reduce the overall project timeline by minimizing the wait time between stages. However, it requires careful planning and coordination to ensure that the overlapping does not create confusion or conflict. 4. Randomly with overlapping: Implementing the stages of SDLC randomly with overlapping is the least recommended approach. This method involves starting and completing stages randomly and with some overlapping. This approach can lead to confusion, delays, and increased costs, as well as making it difficult to track progress and ensure that all requirements are met. In summary, implementing the stages of SDLC sequentially, without overlapping is the most common and recommended approach. This ensures that each stage is completed before moving onto the next, while also minimizing the project timeline.
Question 30 Report
The first commuters were programed using _________
Answer Details
The first commuters were programmed using machine language. Machine language is the lowest-level programming language that can be used to write computer programs. It consists of binary code, which is a sequence of 1's and 0's that the computer can understand and execute directly. The first computers, such as the ENIAC, did not have high-level programming languages like we have today, such as Python or Java. Instead, they had to be programmed using machine language. This meant that the programmers had to manually enter long sequences of binary code to perform even the simplest tasks on the computer. As computers advanced, higher-level programming languages were developed to make programming easier and more accessible to non-experts. These higher-level languages are often compiled into machine language, which the computer can then execute. But in the early days of computing, programmers had no choice but to write code directly in machine language.
Question 31 Report
An inventory management program can assist with ________
Answer Details
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.
Question 32 Report
In Boolean algebra, the bar sign (-) indicates ....................
Answer Details
The bar sign (-) in Boolean algebra indicates the NOT operation. The NOT operation is a unary operator that negates or inverts a Boolean value. If the input value is "true", the output of the NOT operation will be "false". And if the input value is "false", the output of the NOT operation will be "true". In essence, the NOT operation changes the truth value of the input. This operation is also sometimes referred to as the "complement" or "inverse" operation.
Question 33 Report
What is a computer file.
Answer Details
A computer file is a place on a computer where information is stored in a package. A file can contain many different types of information, including text, images, audio, video, and executable programs. The information in a file is organized in a specific format, and the file can be opened and edited using appropriate software. For example, a text file contains plain text, while a Word document file contains formatted text and other elements like images and tables. A file is often saved with a specific name and extension that identifies the type of file and the type of information it contains. The extension is the part of the file name that comes after the dot, such as ".txt" for a plain text file or ".docx" for a Microsoft Word document file.
Question 34 Report
What is the primary purpose of Microsoft Excel?
Answer Details
Microsoft Excel is primarily used to solve problems involving numbers. It is a spreadsheet program that allows you to organize, analyze and perform calculations on data. You can use Excel to create tables, charts and graphs to visually represent your data and make it easier to understand. It is commonly used for tasks such as budgeting, tracking expenses, and managing project timelines. The program also has many built-in functions that can help you perform complex calculations and analysis with ease. So, the main purpose of Microsoft Excel is to help you work with numbers and make sense of data.
Question 35 Report
Which of the memories must be refreshed many times per second?
Answer Details
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.
Question 36 Report
A permanent memory, which has data and instruction to start up the computer and does not erase data after power off.
Answer Details
The permanent memory that has data and instructions to start up the computer and does not erase data after power off is called ROM (Read-Only Memory). ROM is a type of computer memory that is pre-programmed with data and instructions during manufacturing. This means that once the data and instructions are written into ROM, they cannot be changed or erased, hence the name "read-only". When you turn on your computer, the CPU (central processing unit) looks to the ROM for the instructions on how to boot up the computer. These instructions include basic input/output system (BIOS) code that checks the hardware components to make sure they are working properly, and then loads the operating system from the hard drive or another storage device. The data and instructions stored in ROM are not affected by power outages or restarts, meaning that they are retained even when the computer is turned off. This is why ROM is called non-volatile memory. In summary, ROM is a type of permanent memory that contains data and instructions to start up a computer and does not lose this information when the computer is turned off.
Question 37 Report
What type of errors occurs when the program is asked to implement an impossible task such as dividing a number by zero?
Answer Details
Dividing a number by zero is an impossible mathematical operation, which leads to a type of error called an "Arithmetic error". When a program encounters such an operation, it is unable to perform the calculation, and it generates an error message to indicate the issue. Arithmetic errors are a type of runtime error because they occur during the execution of the program, rather than during the compilation or writing of the code (syntax errors). Logical errors are different from arithmetic errors because they occur when the program's logic is flawed, leading to incorrect results. So, in summary, dividing by zero results in an arithmetic error because it is a mathematical impossibility that cannot be computed.
Question 38 Report
In SQL, which command is used to remove a stored function from the database?
Answer Details
The command used to remove a stored function from the database in SQL is the "DROP FUNCTION" command.
This command is used to permanently remove a stored function from the database. For example, if you have a stored function named "my_function", you can remove it with the following SQL statement:
DROP FUNCTION my_function;
It is important to note that once you drop a stored function, all references to it in your database will be lost and it cannot be recovered. So, it should be used with caution.
Question 39 Report
The hexadecimal digits are 0-9 and A-_____
Answer Details
The correct answer is "F." In the hexadecimal number system, there are 16 possible digits that can be used to represent a value. Since we only have 10 Arabic numerals (0-9) to work with, we need to use letters to represent the remaining six digits. In hexadecimal notation, after 9 comes A, followed by B, C, D, E, and finally F. So the complete set of hexadecimal digits are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F. Therefore, the correct answer is F.
Question 40 Report
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 _________
Answer Details
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.
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