CS401P Quiz 7

CS401P - Quiz No.7

Date: 01 January 2026

Q1. In string instructions, the mode is called auto-increment mode when:

1. CX is set
2. DF is set
3. ZF is cleared
4. DF is cleared

Correct answer: DF is cleared

Q2. In string instructions, the mode is called auto-decrement mode when:

1. DF is cleared
2. ZF is cleared
3. DF is set
4. CX is set

Correct answer: DF is set

Q3. In the assembly language program, when using div instruction, dividend is stored in ____

1. DI
2. AX
3. Operand placed with div instruction
4. BX

Correct answer: AX

Q4. MOV AX, 0XB800 MOV ES, AX ; This instruction points ES to_______.

1. graphics base
2. video base
3. numeric base
4. audio base

Correct answer: video base

Q5. REP with _____will utilizes the full processor power to do the scrolling in minimum time

1. LES
2. REPNE
3. MOVS
4. SCAS

Correct answer: MOVS

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