OCR A-Level Computer Science: Topic 1.1 CPU Characterists

Which component is responsible for carrying out arithmetic and logical operations in the CPU?

• Control Unit (CU)

• Arithmetic Logic Unit (ALU)

• Memory Address Register (MAR)

• Accumulator

What is the primary function of the control unit (CU) within the CPU?

• Perform arithmetic calculations

• Manage input/output devices

• Decode and execute instructions

• Store data

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

• MAR

• MDR

• PC

• ACC

What is the role of the Memory Data Register (MDR)?

• Stores the result of ALU operations

• Holds data being transferred to or from memory

• Holds the current instruction

• Stores addresses

What type of processor executes one instruction at a time?

• RISC

• CISC

• Dual-core

• Multi-threaded

Which is an advantage of RISC architecture over CISC?

• More complex instructions

• Faster clock speed

• Simpler hardware design

• More power consumption

Which factor is least likely to affect CPU performance?

• Clock speed

• Number of cores

• GPU model

• Cache size

What is the role of cache memory in a CPU?

• Stores permanent data

• Holds data recently used by the CPU

• Expands RAM

• Acts as virtual memory

Which component stores both data and instructions temporarily for quick access by the CPU?

• ROM

• Hard Drive

• RAM

• Register

Which storage technology uses magnetic disks for data storage?

• Hard Drive

• Solid State Drive

• Flash Drive

• Optical Drive