Essential terminology and core principles covering data representation, hardware, and networking for the Cambridge International A-Level Computer Science exam.
20 cards
Front
What defines a Local Area Network (LAN)?
Back
A LAN connects computers within a limited geographical area, such as a single building, school, or campus. It typically offers high data transfer rates and does not require leased telecommunication lines.
Front
Define the term 'Bit'
Back
A bit (short for binary digit) is the smallest unit of data in a computer. It has a single binary value of either 0 or 1.
Front
What is the function of the Control Unit (CU)?
Back
The Control Unit manages the execution of instructions. It decodes machine code instructions and sends control signals to other components of the computer to direct operations.
Front
Explain 'Lossless Compression'
Back
A compression algorithm that allows the original data to be perfectly reconstructed from the compressed data. No data is lost during the process, though the file size reduction is usually smaller than with lossy methods.
Front
Define 'Pixel' in the context of images
Back
A pixel (picture element) is the smallest controllable element of a picture represented on the screen. In a bitmap image, resolution is determined by the number of pixels horizontally and vertically.
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