A Level Computer Science Q&A Bundle

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...

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 digital sa...

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 CIR Current Instruction Register Define CPU The main processor in a computer system handling data and instructions. Define ALU ...

List 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 CPU and...

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 th...

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 binar...

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 internet ...

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/Tim...

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 and the one befo...

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 Write C...

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 to t...

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 the...

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 ei...

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 fil...