OCR J277 - 1.1 - CPU and Embedded Systems - Knowledge Check

Which of the following is a main purpose of the CPU?

• To carry out the fetch-execute cycle

• To store large amounts of data permanently

• To display graphics on the monitor

• To connect to the internet

Which register in the Von Neumann architecture holds the address of the next instruction to be executed?

• Program Counter

• Accumulator

• Cache

• ALU

What is the main purpose of the MDR (Memory Data Register)?

• To store data being transferred to or from memory

• To control the execution of instructions

• To perform logical operations

• To store the next instruction address

Why is understanding the effects of changing CPU characteristics important?

• It helps in optimizing system performance

• It helps in designing better graphics

• It increases the size of the monitor

• It reduces the need for memory

Which characteristic of a CPU allows it to process more tasks simultaneously?

• Number of cores

• Cache size

• Clock speed

• Program Counter

What is the role of the accumulator in the CPU?

• It stores intermediate results of calculations

• It controls the execution of instructions

• It stores the next instruction address

• It manages the clock speed

Which of the following is a typical characteristic of embedded systems?

• They are designed to perform a specific function

• They are used for general-purpose computing

• They have large amounts of RAM

• They run multiple operating systems

What does the MAR (Memory Address Register) store?

• The address of data to be accessed

• The result of arithmetic operations

• The instructions to be executed

• The speed of the CPU

What is the difference between storing data and storing an address in a register?

• Data is the actual value, while an address points to a location in memory

• Data is always a number, while an address is always a letter

• Data is stored permanently, while addresses are temporary

• There is no difference

Which register in the Von Neumann architecture temporarily holds data being transferred to or from memory?

• MDR (Memory Data Register)

• Program Counter

• ALU

• Cache