Computer Architecture Quiz

What does the CPU stand for?

• Computer Program Unit

• Computer Processing Unit

• Central Processing Unit

• Central Program Unit

What is the function of the Memory Address Register (MAR)?

• Holds the address of the instruction to be fetched next

• Contains the data to be written into memory

• Stores the result of the last operation

• Specifies the address in memory for the next read or write

What is the purpose of the Instruction Register (IR)?

• Contains the data to be written into memory

• Holds the address of the next instruction

• Specifies a particular I/O device

• Loads the fetched instruction

What is the basic function performed by a computer?

• To perform arithmetic operations

• To manage I/O devices

• To store data

• To execute programs

What does the Program Counter (PC) do?

• Contains the data to be written into memory

• Specifies a particular I/O device

• Holds the address of the instruction to be fetched next

• Stores the result of the last operation

How many bits are in a byte?

• 4 bits

• 8 bits

• 16 bits

• 32 bits

What is the word length of general-purpose computers nowadays?

• 64 to 128 bits

• 32 to 64 bits

• 16 to 32 bits

• 8 to 16 bits

What is the purpose of the Accumulator (AC)?

• To hold the result of arithmetic operations

• To specify a particular I/O device

• To store the address of the next instruction

• To contain the data to be written into memory

What is the maximum number of different opcodes that can be represented with 4 bits?

• 8

• 32

• 16

• 24

What does the Operand Fetch (OF) step do?

• Writes the result into memory

• Analyzes the instruction to determine the operation

• Fetches the operand from memory or I/O

• Performs the operation indicated in the instruction