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A- Level Computer Science Q&A Guide

Dive into the he heart of computing concepts, algorithms, and programming prowess. Enhance your skills, solidify your theoretical foundation, and navigate the dynamic world of computing with confidence using this invaluable questions and answers resource.

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OCR Computer Science A Level Paper 1 Exam Questions and Answers

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PC Program counter, contains the address of the next instruction CIR Current Instruction Register: stores the address of the next instruction currently being executed and decoded MAR Memory Address Register, holds relevant memory address (to read from or write to) MDR Memory Data Register, st...

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OCR A-Level Computer Science Review Questions and Answers

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1 Dimensional Arrays A standard list array - one index is needed to search for something in an array. 2 Dimensional Arrays An array with 2 indexes needed to search - for example a table could be this. Interception of PseudoCode The ability to pick out and explain parts of code. Big O' A meas...

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OCR A level Computer Science Paper 2 Exam Revision Questions and Answers

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Abstraction Representation that is arrived at by removing unnecessary details Pop Remove and return the last item from a list/data structure Push To add an item to the top of a stack/end of a queue/list Depth First Traversal Each node in one branch is visited before backtracking to explore the ...

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A-Level OCR Computer Science Practice Questions and Answers

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CPU Central Processing Unit ALU Arithmetic Logic Unit CU Control Unit PC (CPU) Program Counter ACC Accumulator MAR Memory Address Register MDR Memory Data Register

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A-Level OCR Computer Science Practice Questions and Answers

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CPU Central Processing Unit ALU Arithmetic Logic Unit CU Control Unit PC (CPU) Program Counter ACC Accumulator MAR Memory Address Register MDR Memory Data Register

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Cambridge AS Level Computer Science – Theory Examination Questions and Answers

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176 Convert Denary 374 to Hexadecimal. 2DF Convert Denary 735 to Hexadecimal. Convert Hexadecimal DB7 to Binary. 64001 Convert Hexadecimal FA01 to Decimal. The binary number obtained by subtracting each digit in a binary number from 1. Define one's compliment. The one's compliment of a bin...

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WJEC A-Level Computer Science Revision Questions and Answers

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A Network of Networks. Internet A process or set of rules to be followed to solve a given problem. Algorithm A collection of related records. File A collection of related fields. Record Is an Internet standard for electronic mail transmission. SMTP Is an Internet standard protocol used by e-mai...

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A-Level AQA Computer Science Paper 2 Review Questions and Answers

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Baud Rate The maximum possible number of signal changes that can occur in a wire per second. Bit Rate The number of bits that can be sent down a wire per second. Integer A whole number that can be positive, negative or zero. Examples: -3, 0, 7, 2013588. Natural (Number) A whole number that is ...

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Computer Science AQA A-Level Paper 1 Revision Questions and Answers

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What is an integer? A positive or negative whole number What is a Real or Float number? A positive or negative number that can have a fractional part. What is a Boolean? True or False What is a character? A single letter, number or symbol What is a string? A group of characters What is Date/T...

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Hardware and software - A-Level Computer Science Practice Questions and Answers

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Software Software comprises all of the programs that make the computer function Hardware The physical components of a computer system Systems software Required to run and manage the computer's hardware and application programs Disk Defragmentation Process of consolidating fragmented files on t...

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Cambridge International AS and A-Level Computer Science (9618) Communication and Network Technologies Review Questions and Answers

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What is a static IP Address - never changes - provided by ISP What is the purpose and benefits of networking devices - File sharing - you can easily share data between different users. - Resource sharing - using peripheral devices and software between users, saves money - Sharing a single in...

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OCR A Level Computer ScienceNetworks Review Questions and Answers

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Protocol A set of rules governing the exchange or transmission of data between devices. Hypertext Transfer Protocol (HTTP) protocol that defines how messages are formatted and transmitted over the World Wide Web File Transfer Protocol (FTP) a simple network protocol that allows the transfer of...

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AQA A-Level Computer Science - Fundamentals of Programming Revision Questions and Answers

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Constants They are variable whose values will not be changed by the program. What are the advantages of having constants? - Improves the readability of code - Easier to update the programming code if the value changes - Reduce the likelihood of inconsistency causing errors if multiple places use ...

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OCR A Level Computer Science Paper 2 Practice Questions and Answers

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Abstraction a way of separating logical and physical parts of a problem e.g. the london underground map. You get rid of unnecessary details Problem abstraction where you keep removing details until the problem reduces to one that has already been solved Modelling and Simulation Building a mode...

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Computer Science OCR A Level Practice Questions and Answers

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Start LDA one OUT LDA zero OUT LDA count SUB one STA count BRP start HLT One DAT 1 Zero DAT 0 Count DAT 3 Explain, giving an example, how pipelining in a CPU could speed up the execution of this program. ( 3 marks ) An instruction can be fetched as the previous one is being decoded a...

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OCR A-Level Computer Science - Software Development – Methodologies Questions and Answers

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Waterfall Method A development methodology that splits a project up into a number of sequential stages, with each stage having a specific purpose. Pure Waterfall Method Identical to Waterfall Method, except once a stage is passed it cannot be re-visited. Stages of Waterfall Method 1. Define Re...

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Data Structures A Level Computer Science AQA Revision Questions and Answers

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What is a queue? A First In First Out Data Structure. What is a stack? A LIFO, last-in first-out data structure. Define Abstract data type An abstract data type is a logical description of how the data is viewed and the operations that can be performed on it, but this is not necessarily known ...

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A Level Computer Science AQA, Binary Representation of Images and Sound Review Questions and Answers

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Describe how bit patterns may represent other forms of data, including graphics and sound. Bit patterns can be used to store information about other forms of data, for example images can be stored using the images height and width in pixels with the colour depth and sound can be stored as digi...

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OCR AS and A level Computer Science Exercises

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Q1.(a) Explain why compression is considered necessary for images on the web. [2] Transmission of data is faster (web pages will load more quickly) and uses less data allowance with smaller image files. Q1.(b) Explain why lossy compression techniques would not be suitable for use with files c...

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AQA A Level Computer Science Revision Questions and Answers

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ist two components with which the CPU works to execute program instructions. Memory Input and Output Devices Describe the role of the Control Unit in the fetch-decode-execute cycle. The control unit coordinates the actions of the computer. It sends out control signals to other parts of the C...

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Computer Science Paper 1 Practice Questions and Answers

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Control Unit A register in the cpu that controls and coordinates the activities of the cpu directing the flow of data Bus a series of connectors that transfer signals between internal components Memory Read causes data from the addressed location in RAM to be placed on the data bus Memory Wri...

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