CS401 Quiz 4 January 2026

Quiz 1 - CS401 (Q1/10)

Question:

In the context of video services, if we want to scroll the window up which of the following will be the value of AH?

1. AH = 07h
2. AH = 05h
3. AH = 06h
4. AH = 08h

Correct answer: AH = 06h

Copied: 1/6/2026, 11:24:17 AM

Quiz 2 - CS401 (Q2/10)

Question:

Which of the following stands for TSR?

1. Terminate and Store Routines
2. Truncate and Start Recursively
3. Terminate and Stay Resident
4. Transmit and Save Resources

Correct answer: Terminate and Stay Resident

Copied: 1/6/2026, 11:24:49 AM

Quiz 3 - CS401 (Q3/10)

Question:

The 'program segment prefix' for com files is of _____ size.

A. 256 bytes

B. 64 bytes

C. 128 bytes D. 512 bytes Copied: 1/6/2026, 11:25:18 AM

Quiz 4 - CS401 (Q4/10)

Question:

In DOS, if 'file name' is more than 8-characters then which flags of 'attribute byte' are set

A. Directory flag, Hidden flag, System flag and Volume label flag

B. Directory flag and System flag C. Directory flag and Hidden flag D. System flag and Volume label flag Copied: 1/6/2026, 11:25:41 AM

Quiz 5 - CS401 (Q5/10)

Question:

Which of the following services of INT 10 is used to write graphic pixel on the screen ?

1. 0x0B
2. 0x0D
3. 0x0A
4. 0x0C

Correct answer: 0x0C

Copied: 1/6/2026, 11:26:17 AM

Quiz 6 - CS401 (Q6/10)

Question:

In multitasking, which of the following interrupts is used as a scheduler?

1. INT 16
2. INT 21
3. INT 08
4. INT 13

Correct answer: INT 08

Copied: 1/6/2026, 11:26:44 AM

Quiz 7 - CS401 (Q7/10)

Question:

On executing INT 0x21--service 0x3D, if file can't be opened then

A. ZF will contain 0 B. CF will contain 0 C. ZF will contain 1

D. CF will contain 1

Copied: 1/6/2026, 11:26:59 AM

Quiz 8 - CS401 (Q8/10)

Question:

Which of the following symbols is used to terminate a string in assembly language?

1. ;