And computer scie - Study guides, Class notes & Summaries

GCSE Edexcel Computer Science Exam Questions And Complete Solutions 1. Explain how binary is used to represent data (numbers, text, sound, graphics) and program instructions binary is used to represent all elements in a computer It is stored as a series of 0s and 1s These relate to the position of transistors (on or off) All analogue data stored is converted into digital (binary) 2 Explain the difference between unsigned and signed integers An unsigned integer can only represent positive...

1.1 Number Representation What are binaries?o Values stored as a series of ones and zeroes o A single 0 or 1 is called a binary digit or bit. o Any group of 0s & 1s can represent a character 4 2 1 0 0 0 0 0 0 0 0 o E.g. 65 in binary is 1000001 1.1 Number Representation What are BCD Representation?o Each digit in the number is written separately in a series of 4 bits o E.g. 398 in BCD o 3 = 0011 9 = 1001 8 = 1000 o 398 = o Use of BCD: used in business applications (arithmetic) whe...

AP Computer Science ACTUAL Questions and CORRECT Answers Bit - CORRECT ANSWER- Binary Digit, the single unit of information in a computer. Bit rate - CORRECT ANSWER- the number of bits that are processed in a unit of time Protocol - CORRECT ANSWER- A set of rules used for transmitting data

Absolute Error - Answer The difference between the actual number and the nearest representable value. Abstract data type (ADT) - Answer A data type whose properties are specified independently of any particular programming language. Abstraction - Answer Representation that is arrived at by removing unnecessary details. Aggregation - Answer Relationship between two object types in which one object type has a component which is of the other type. Ajax - Answer Web technology ...

Edexcel GCSE Computer Science Exam 2024 Updated Questions And Complete Answers What is a character? A letter,number or symbol on a given character set What is a string? A sequence of characters What is casting? Changing the data type of a variable What is a count-controlled loop? A loop that repeats a specific number of times (FOR loops) What is a condition controlled loop? A loop that runs until a condition is met (WHILE loops) When would you use a variable? When a value might n...

Edexcel GCSE Computer Science Glossary Exam Questions And Complete Answers Compiler Translates the whole program into machine code at once before the program is run. 1. Code executes quickly (as already translated). 2. Slower to find errors (as all code must be translated). Interpreter Translates source code into machine code, line by line when the program is run. 1. Code can run on different platforms/devices (as it's translated on the platform running the program). 2. Source c...

Arithmetic Logic Unit (ALU) Performs operations on data e.g. Addition, subtraction Control Unit (CU) Coordinating activities of the CPU Registers Quick, small stores of data within the CPU Memory Address Register (MAR) Holds memory address for data or a instruction about to be used by the CPU Memory Data Register (MDR) Holds actual data or instruction Accumulator Stores results of calculations in the ALU

(1.1) Prototype - Answer A preliminary sketch of an idea or model for something new. It's the original drawing from which something real might be built or created. (1.2) Binary question - Answer A question to which there are only two possible answers. (1.2) Binary message - Answer A message that can only be one of two possible values. (1.3) Bit - Answer A contraction of "Binary Digit". The single unit of information in a computer, typically represented as a 0 or 1. (1.3) Bit r...

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