Computer Science - 4CP0 PearsonEdexcel

Binary

Bayani Gaba-gaba

A computer's processor only ever switches between two electrical states, and everything it stores or calculates has to be built out of those two states. Numbers, letters, photographs and even the instructions of the program itself are all, deep down, patterns of binary digits.

In this lesson you will learn to convert confidently between binary, denary and hexadecimal, add two binary numbers and recognise when the result overflows an 8-bit register, shift a binary pattern left and right, and represent both positive and negative whole numbers using sign-and-magnitude and two's complement.

Manufura

Understand that computers use binary to represent data (numbers, text, sound, graphics) and program instructions
Understand how computers represent and manipulate numbers (unsigned integers, signed integers (sign and magnitude, two's complement))
Be able to convert between binary and denary whole numbers (0-255)
Understand how to perform binary arithmetic (add, shifts (logical and arithmetic)) and understand the concept of overflow
Understand why hexadecimal notation is used and be able to convert between hexadecimal and binary

Takardar Darasi

A computer's circuits are built from switches that are only ever fully on or fully off; there is no reliable middle state to detect at high speed. Binary, the base-2 number system using only the digits 0 and 1, maps perfectly onto this: 1 for on, 0 for off. Every kind of data a computer handles, whole numbers, text, sound, images and even the program instructions themselves, is ultimately stored as a pattern of these binary digits (bits), just interpreted differently depending on what it represents.

Akwai a cikin manhajar Green Bridge

Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.

Cikakkiyar bayanan darasi tare da zane-zane

Mataimakiyar koyo da AI

Yi karatu ba tare da intanet ba, a kowane lokaci, a ko'ina

Zazzage manhajar wayar hannu Zazzage manhajar kwamfyuta

Akwai a Android, Windows, macOS, da Linux

Nazarin Darasi

Barka da kammala darasi akan Binary. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.

Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.

Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.

What is the denary value of the 8-bit binary number 00110010? A) 48 B) 50 C) 52 D) 56 Answer: B
How many bits are grouped together to form a single hexadecimal digit? A) 2 B) 3 C) 4 D) 8 Answer: C
An 8-bit unsigned register adds 250 and 10. What happens? A) The result 260 is stored correctly B) Overflow occurs and the stored result is incorrect C) The register automatically becomes 16-bit D) The addition is rejected and nothing is stored Answer: B
Which type of shift copies the sign bit into new positions created by a right shift? A) Logical shift B) Arithmetic shift C) Circular shift D) Hexadecimal shift Answer: B
In two's complement, what does the leftmost bit of an 8-bit number represent? A) A place value of +128 B) A place value of -128 C) Always 0 D) The number of bits used Answer: B