Addressing modes

In immediate addressing mode, where is the operand located?

• In memory

• In a register

• Embedded in the instruction

• Determined by an index register

Which of the following is an example of immediate addressing mode?

• MOV AX, BX

• MOV AX, 5

• MOV [AX], BX

• MOV AX, [5]

In direct addressing mode, the operand is located at:

• The address given in the instruction

• The instruction itself

• A register

• An offset from a base register

Which of the following instructions uses direct addressing mode?

• MOV AX, [1000H]

• MOV AX, BX

• MOV AX, 1000H

• MOV AX, [BX]

In indirect addressing mode, the operand’s address is:

• Hardcoded in the instruction

• Stored in a register

• Stored in memory, and the address is held in another register

• Stored in a constant

Which instruction uses indirect addressing mode?

• MOV AX, 2000H

• MOV AX, [BX]

• MOV AX, BX

• MOV AX, [1000H]

Register addressing mode involves accessing the operand:

• In memory

• In a register specified by the instruction

• At an address calculated using a base and offset

• At a fixed address

Which instruction uses register addressing mode?

• MOV AX,2000H

• MOV AX, [2000H]

• MOV AX, BX

• MOV [AX], BX

In indexed addressing mode, the effective address is calculated by:

• Adding an index value to a base address

• Using an immediate value

• Storing the operand in the register

• Storing the operand at a fixed address

Which instruction uses indexed addressing mode?

• MOV AX, [BX+SI]

• MOV AX, [2000H]

• MOV AX, 1000H

• MOV AX, BC