3.1 Computer Architecture

What is the main purpose of the CPU?

• Store data

• Fetch, decode, and execute instructions

• Transfer data between devices

• Manage user interfaces

The instruction ADD typically adds a value to the one stored in the _______.

_______ systems are small, low-power computers with a single dedicated function.

Which of the following registers holds the address of the next instruction to be executed?

• Accumulator (ACC)

• Memory Data Register (MDR)

• Program Counter (PC)

• Current Instruction Register (CIR)

What is the function of the Control Bus in a CPU?

• Carry memory addresses

• Transmit data to/from the CPU

• Send control signals between components

• Store frequently accessed data

True or False:

Discuss the benefits of increasing a CPU's cache size and clock speed. Explain how they improve performance and any potential drawbacks.
2. Clock Speed: Increases the number of instructions processed per second; higher speeds can generate more heat, requiring better cooling systems.

• True

• False

What happens during the decode stage of the FDE cycle?

• Instructions are fetched from memory.

• The CPU works out the instruction by splitting it into opcode and operand.

• The result of a calculation is stored in the accumulator.

• The Program Counter increments to point to the next instruction.

What does a clock speed of 3.5 GHz mean?

• The CPU can fetch, decode, and execute 3.5 million instructions per second.

• The CPU can perform 3.5 billion instructions per second.

• The CPU has 3.5 cores for processing.

• The CPU has a cache size of 3.5 GB.

The _______ holds the address of where data or instructions are fetched from memory.

True or False:

Discuss the benefits of increasing a CPU's cache size and clock speed. Explain how they improve performance and any potential drawbacks.
1. Cache Size: Reduces memory fetches, improving speed; however, increasing size is costly.

• True

• False