OCR GCSE Computer Science - Hardware and Units of Storage

What is the main function of the CPU?

• To store data permanently

• To execute instructions

• To display graphics

• To manage network connections

Which part of the CPU carries out arithmetic operations?

• Control Unit

• Cache

• ALU

• MDR

Which register holds the address of the next instruction to be executed?

• MDR

• MAR

• Program Counter

• Accumulator

What is the purpose of cache memory?

• To store large files permanently

• To hold frequently used data for quick access

• To manage power supply in the CPU

• To store all installed programs

Which architecture is most commonly used in modern computers?

• Harvard

• Von Neumann

• RISC

• CISC

Which characteristic improves CPU performance the most?

• Increasing the number of cores

• Reducing RAM size

• Using magnetic storage

• Using smaller screens

What type of memory is volatile?

• ROM

• RAM

• Hard drive

• Optical disc

What is stored in ROM?

• The operating system (OS)

• User files

• The startup instructions (BIOS)

• Temporary data

Why is virtual memory used?

• To store data permanently

• To provide extra storage when RAM is full

• To increase CPU speed

• To improve the monitor resolution

Which of these is NOT a type of secondary storage?

• SSD

• RAM

• Magnetic hard drive

• DVD