GCSE CPU Components

Which of the following is not a component inside a CPU?

• Arithmetic Logic Unit (ALU)

• Control Unit

• Registers

• RAM

What is the function of the Control Unit (CU) in a CPU?

• Performs arithmetic and logic operations

• Stores the results from the ALU

• Decodes the instructions and controls the timing of operations in the CPU

• Holds the memory location of data to be fetched

What does the Arithmetic Logic Unit (ALU) do?

• Controls the timing of operations in the CPU

• Decodes the instructions

• Performs arithmetic and logic operations

• Stores the data retrieved from RAM

Which register holds the address for the next instruction to be executed by the CPU?

• MAR (memory address register)

• MDR (memory data register)

• PC (program counter)

• ACC (accumulator)

What is the purpose of the Memory Address Register (MAR)?

• It decodes the instructions

• It holds the memory location of data to be fetched

• It stores the results from the ALU

• It performs arithmetic and logic operations

What is the role of the Accumulator (ACC) in the CPU?

• It decodes the instructions

• It performs arithmetic and logic operations

• It holds the memory location of data to be fetched

• It stores the results from the ALU

What is the function of cache in a CPU?

• To provide additional storage outside the CPU

• To act as a high-speed storage area that the CPU can access quickly

• To increase the clock speed of the CPU

• To connect multiple CPUs for parallel processing

Which of the following is NOT a common characteristic of CPUs that affects their performance?

• Clock speed

• Cache size

• Number of cores

• Color of the CPU

What is the purpose of embedded systems?

• To perform a dedicated function within a larger mechanical or electrical system

• To replace the central processing unit in computers

• To increase the cache size of the CPU

• To enhance the clock speed of the CPU

What is the role of the PC (Program Counter) in the CPU?

• Store the result of computations

• Decode the instruction/data

• Retrieve the address of the next instruction from RAM

• Copy the address from the PC, point towards the assigned RAM address