Computer Architecture IGCSE ( Mr. A )

Which of the following best describes the Von Neumann Architecture concept?

• A. Data and instructions are stored in the same memory unit

• B. Data and instructions are stored in separate memory units

• C. Data is stored in RAM and instructions in ROM

• D. Data is stored in cache memory only

What is the Address Bus in a computer system and how does it function?

• A. It carries memory addresses between the CPU and memory

• B. It temporarily holds data fetched from memory

• C. It controls the input devices

• D. It stores the results of arithmetic operations

What happens during the Execute stage of the Fetch, Decode, and Execute Cycle in CPU operation?

• A. The CPU carries out the instruction's operation

• B. Data is fetched from memory

• C. Program instructions are stored

• D. Input devices are synchronized

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

• A. It holds the memory address of the next instruction to be fetched

• B. It stores the results of arithmetic operations

• C. It manages memory access

• D. It controls the input devices

What does Immediate Access Store (IAS) refer to in computing?

• A. The main memory unit in Von Neumann architecture

• B. A type of cache memory

• C. A storage device for long-term data retention

• D. A network communication protocol

What is the main function of the Accumulator (ACC) in a CPU?

• A. It stores the results of arithmetic operations

• B. It manages memory access

• C. It controls the input devices

• D. It holds the current instruction being executed

What is the Control Bus in a computer system and how does it operate?

• A. It carries control signals between the CPU and other devices

• B. It stores program instructions

• C. It performs arithmetic calculations

• D. It manages memory access

What is Overclocking in the context of computer hardware?

• A. Running a CPU at a higher speed than officially specified

• B. Adding more cores to a CPU

• C. Increasing the amount of cache memory

• D. Upgrading the system clock frequency

What is meant by the 'Fetch, Decode, and Execute Cycle' in CPU operation?

• A. The sequence of steps in processing instructions

• B. A type of computer virus

• C. A method of cooling the CPU

• D. A software development tool

What is the Memory Address Register (MAR) used for in a computer system?

• A. Storing memory addresses of data to be accessed

• B. Performing arithmetic calculations

• C. Managing input and output devices

• D. Controlling the flow of data