What is the primary function of machine instructions in a CPU?

To provide commands that the processor can recognize and execute.

Which of the following is a data transfer instruction? A) ADD B) MOV C) MUL D) CMP

B) MOV

True or False: The effective address in an instruction is always fixed and does not change.

False. The effective address can vary based on the addressing mode used.

Fill in the blank: The ______ specifies the way the operand or the effective address is determined in an instruction.

Mode field

Riddle: I can hold data and perform operations but cannot think. What am I?

A CPU (Central Processing Unit)

What is the main advantage of using immediate addressing mode?

It allows the operand to be specified directly within the instruction, eliminating the need for a memory reference.

Which instruction format requires only one address field in a single accumulator organization? A) Two-address B) Three-address C) One-address D) Zero-address

C) One-address

True or False: The purpose of an interrupt service routine (ISR) is to handle interrupts and restore the CPU state.

True.

Fill in the blank: The addressing mode that uses the content of a register as the address of the operand is called ______.

Register indirect addressing mode

What is the role of the program counter (PC) in branch related addressing modes?

The program counter holds the address of the next instruction to be executed.