1.1 System Architecture

What is the complete process of retrieving an instruction from storage, decoding it, and carrying it out known as?

• Fetch-decode-execute cycle

• Arithmetic Logic Unit (ALU)

• Control Unit (CU)

• Memory Address Register (MAR)

Which part of the CPU performs calculations and logical comparisons?

• Arithmetic Logic Unit (ALU)

• Control Unit (CU)

• Cache

• Register

What does the Control Unit (CU) in the CPU do?

• Decodes instructions and sends signals to control how data moves around the CPU

• Performs calculations and logical comparisons

• Provides fast access to frequently used instructions and data

• Holds the address of the next instruction to be executed

What is the function of the Cache in the CPU?

• Provides fast access to frequently used instructions and data

• Holds the address of the next instruction to be executed

• Performs calculations and logical comparisons

• Decodes instructions

What are tiny areas of extremely fast memory located in the CPU, normally designed for a specific purpose where data or control information is stored temporarily, called?

• Registers

• Cache

• Control Unit (CU)

• Memory Address Register (MAR)

What is the traditional computer architecture that forms the basis of most digital computer systems known as?

• Von Neumann architecture

• Fetch-decode-execute cycle

• Arithmetic Logic Unit (ALU)

• Control Unit (CU)

What does the Memory Address Register (MAR) hold?

• The address of data ready to be used by the memory data register or the address of an instruction passed from the program counter

• Data fetched from or to be written to memory

• The address of the next instruction to be executed

• The result of calculations

What does the Memory Data Register (MDR) hold?

• Data fetched from or to be written to memory

• The address of data ready to be used by the memory data register

• The address of the next instruction to be executed

• The result of calculations

What does the Program Counter hold?

• The address of the next instruction to be executed

• The result of calculations

• Data fetched from or to be written to memory

• The address of data ready to be used by the memory data register

What does the Accumulator hold?

• The result of calculations

• The address of the next instruction to be executed

• Data fetched from or to be written to memory

• The address of data ready to be used by the memory data register