8086 Assembly Language Quiz

What does the MOV instruction do in 8086 assembly language?

• Moves data from memory to a register

• Adds two numbers

• Compares two values

• Subtracts one number from another

What is the purpose of the INT21h instruction?

• Initiates a hardware interrupt

• Calls DOS interrupt services

• Performs arithmetic operations

• Loads a program into memory

Which register is used to store the result of an arithmetic operation?

• AX

• BX

• CX

• DX

What does the CLI instruction do?

• Clears the interrupt flag

• Sets the carry flag

• Clears the direction flag

• Interrupts the current process

In 8086 assembly, which instruction is used to clear a register?

• MOV AX, 0

• CLR AX

• XOR AX, AX

• SET AX, 0

The HLT instruction halts the CPU until the next external interrupt.

• True

• False

The NOP instruction performs no operation and simply increments the instruction pointer.

• True

• False

In 8086 assembly, the JMP instruction can only be used for unconditional jumps.

• True

• False

The RET instruction is used to return from a subroutine.

• True

• False

The PUSH and POP instructions are used to add and remove values from the stack.

• True

• False