1 OCR GCSE Computer Science - Fetch Decode Execute

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

• Memory
• Control Unit
• Arithmetic Logic Unit
• General Purpose Registers
• Text for option 5 (optional)

The control unit does what?

• Connects parts of the CPU together.
• Performs arithmetic and logical operations on the data.
• Stores the outcomes of arithmetic and logic operations.
• Controls timing and control signals around the CPU.

What does ALU stand for?

• Addition Logic Unit
• Arithmetic Logical Unit
• Arithmetic Logic Unit
• Algebra Logic Unit

The Arithmetic Logic Unit does?

• Connects parts of the CPU together.
• Performs arithmetic and logical operations on the data.
• Stores the outcomes of arithmetic and logic operations.
• Controls and coordinates the activities of the CPU.

Which of the following can the Arithmetic Logic Unit not do?

• ADD, SUBTRACT, MULTIPLY, DIVIDE
• Shift operations
• Boolean logic operations
• Accepts instructions and decodes it.

The abbreviation (PC) for a CPU stands for?

• Personal Computer
• Program Counter
• Personal Counter
• Program Count

The abbreviation (ACC) for a CPU stands for?

• Accumulator
• Accumulate
• Arithmetic Logic Unit
• Address

The abbreviation (MAR) for a CPU stands for?

• Main Address Register
• Memory Address Register
• Main Addressing Register
• Memory Addressing Register

The abbreviation (MDR) for a CPU stands for?

• Main Data Register
• Memory Data Register
• Main Directional Register
• Memory Directional Register

Which of the following is not part of the fetch stage?

• Address of next instruction copied from the PC to MAR
• The instructions held at that address is copied to the MDR
• The contents of the MDR are copied to the CIR
• ALU performs calculations on the data.