In DOS input buffer, the _____ byte stores the maximum characters the buffer can hold.

• A) Second
• B) First
• C) Third
• D) Last

While writing graphics pixel on the screen, which registers hold the value for setting cursor position?

• A) BX, CX
• B) AX, CX
• C) AX, BX
• D) CX, DX

Which of the following is the highest priority interrupt?

• A) INT 08
• B) INT 17
• C) INT 10
• D) INT 16

Which of the following stands for TSR?

• A) Terminate and Store Routines
• B) Transmit and Save Resources
• C) Truncate and Start Recursively
• D) Terminate and Stay Resident

The space where all registers of a task are stored is called ____________________.

• A) process control block
• B) heap
• C) cache memory
• D) local variable

In multitasking environment, which of the following structure is used to maintain the order of active Process Control Blocks (PCB)?

• A) Register
• B) Linked List
• C) Array
• D) Stack

iret returns on the basis of __________ and __________.

• A) CS, IP
• B) DS, IP
• C) CS, SS
• D) IP, SP

Which of the following services of INT 10 is used to get the video font information?

• A) 1128h
• B) 1129h
• C) 1130h
• D) 1127h

A FAT32 file system directory entry in DOS consist of how many bytes ?

• A) 16
• B) 24
• C) 64
• D) 32

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

• A) 64 bytes
• B) 512 bytes
• C) 256 bytes
• D) 128 bytes

In the context of video services, if we want to write string then which of the value will be placed in AH?

• A) 10h
• B) 12h
• C) 13h
• D) 11h

We can set the current file position in DOS using service number ____

• A) 0x40
• B) 0x42
• C) 0x38
• D) 0x43

The root directory of floppy contains _____ fixed entries.

• A) 64
• B) 512
• C) 128
• D) 256

"INT13 --BIOS disk services" generally uses which register to return the 'error code' ?

• A) CF
• B) AL
• C) AH
• D) DL

In the context of video services, if we want to set cursor position which of the following will be the value of AH?

• A) AH = 02h
• B) AH = 03h
• C) AH = 04h
• D) AH = 01h

The INT 0x13 service 0x08 is use to

• A) Get drive parameter
• B) Reset disk sector
• C) Read disk sector
• D) Write disk sector

PCB stands for ___________________________.

• A) Process Caching Block
• B) Program Control Block
• C) Process Control Block
• D) Programmable Counter Block