Computer Science - Aqa A Level Questions And Answers 100% Verified A+ Guaranteed

Status Register (SR) {Ans: Contains many bits that are set (1) or cleared (0) depending on the result of an instruction}Rational Number {Ans: Any number that can be expressed as a ratio of two numbers e.g. 2/3}Increasing Clock Speed {Ans: Reduces the time taken to execute instructions}Interpreter {Ans: Translates code from a high level language to computer hardware. Code is run after each line is translated, so it doesn't create 1 piece of machine code}Increasing Word Length {Ans: Registers can store more bits and the processor can process more bits in one go}Barcode Reader {Ans: A device used to read a small pattern of black and white parallel lines and numbers, also known as a barcode}Harvard Architecture {Ans: Instruction memory and data memory are stored separately}Transport Layer {Ans: Provides reliable transmission of data. Puts data into packets and gives them a header containing the port numbers of source and destination and the sequence number. Handles errors (acknowledgements, timeouts and re-transmitting when necessary)}Symmetric Encryption {Ans: The same key is used for both the encryption and decryption algorithm, and for the whole message}Instantiation {Ans: The process of creating an object from a