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Computer Science Flashcards

7 cards from real GCSE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Computer Science flashcards as text

  1. What is the binary representation of the decimal number 13?

    Answer: 1101

    13 in binary is 1101 because 8 + 4 + 0 + 1 = 13.

  2. Which of the following is an example of volatile memory?

    Answer: RAM

    RAM is volatile because it loses its contents when the power is turned off.

  3. What does ALU stand for in the context of a CPU?

    Answer: Arithmetic Logic Unit

    ALU stands for Arithmetic Logic Unit, the component that performs mathematical and logical operations.

  4. How many bits are in one byte?

    Answer: 8

    One byte consists of exactly 8 bits, which is the standard unit of digital information.

  5. What is the hexadecimal equivalent of the decimal number 255?

    Answer: FF

    FF in hexadecimal equals (15 × 16) + 15 = 240 + 15 = 255.

  6. Which storage medium typically has the fastest read/write access speed?

    Answer: SSD

    SSDs (Solid State Drives) use flash memory with no moving parts, giving them much faster access speeds than HDDs or optical media.

  7. What is the primary function of the Control Unit (CU) within a CPU?

    Answer: Directs the operation of the processor by fetching, decoding, and executing instructions

    The Control Unit coordinates all CPU activities by fetching instructions from memory, decoding them, and directing execution.