MCQ Bank
REP with MOVS utilizes the _______________ power of a processor to do scrolling in minimum time.
- A) quarter
- B) half
- C) full
- D) small
Each entry of the interrupt vector table is of __________ byte(s).
- A) 3
- B) 4
- C) 2
- D) 1
The 8088 processor divides interrupts into ____ classes.
- A) Two
- B) One
- C) Three
- D) Four
In the context of video services, if we want to scroll the window up which of the following will be the value of AH?
- A) AH = 07h
- B) AH = 06h
- C) AH = 08h
- D) AH = 05h
The maximum length of DOS command line parameters is
- A) 512 bits
- B) 127 bits
- C) 256 bits
- D) 64 bits
Which of the following is the priority of Interrupt Request (IRQ) 0?
- A) Low
- B) Highest
- C) High
- D) Medium
Which of the following interrupts is used for saving and restoring the registers?
- A) INT 10
- B) INT 09
- C) INT 16
- D) INT 08
Which of the following service of INT 21 is used to write a string on standard output?
- A) 00h
- B) 09h
- C) 02h
- D) 10h
Which of the following interrupts plays the most significant part during single step debugging of a program?
- A) INT 1
- B) INT 0
- C) INT 2
- D) INT 3
On executing INT 0x21--service 0x3D, if file can't be opened then
- A) ZF will contain 1
- B) CF will contain 0
- C) CF will contain 1
- D) ZF will contain 0
Which of the following flags can be used in mathematical operations?
- A) Carry flag
- B) Trap flag
- C) Interrupt flag
- D) Direction flag
In the context of video services, if we want to set the cursor at top left corner, which of the values will be stored in DH and DL respectively?
- A) 25, 80
- B) 01, 01
- C) 00, 80
- D) 00, 00
BIOS video services are exported via interrupt
- A) INT7
- B) INT10
- C) INT8
- D) INT9
Which of the following registers are used as a DOS input buffer?
- A) DS:DX
- B) SS:SP
- C) CS:BX
- D) DS:AX
INT 0x13 service 0x03 is used to _________.
- A) Get drive parameter
- B) Read disk sector
- C) Write disk sector
- D) Reset disk sector
While using INT 10 for writing graphic pixel on screen, which of the following registers hold the information about pixel color?
- A) DH
- B) AL
- C) AH
- D) DL
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 Hidden flag
- C) Directory flag and System flag
- D) System flag and Volume label flag
Which of the following INT 21 service is used to read character from standard input?
- A) 02
- B) 01
- C) 00
- D) 03
In multitasking, which of the following interrupts is used as a scheduler?
- A) INT 16
- B) INT 13
- C) INT 08
- D) INT 21
BIOS video services are broadly classified into ________ categories.
- A) 2
- B) 3
- C) 4
- D) 1