The offset address of an interrupt service routine "n" is at ____________.

• A) n
• B) nx3
• C) nx2
• D) nx4

IBM AT has ___________ Programmable Interrupt Controllers (PIC).

• A) 4
• B) 1
• C) 3
• D) 2

A parallel port has ________ views.

• A) 8
• B) 1
• C) 4
• D) 2

Which interrupt is used for exporting parallel port services from the following options?

• A) INT 17
• B) INT 16
• C) INT 15
• D) INT 8

Which of the following is BIOS interrupt providing keyboard services?

• A) INT 0x16
• B) INT 0x15
• C) INT 0x14
• D) INT 0x13

The Programmable Interval Timer (PIT) has an input frequency of _________________.

• A) 2.19318 MHZ
• B) 3.19318 MHZ
• C) 4.19318 MHZ
• D) 1.19318 MHZ

Which of the following is the interrupt number for Non-Maskable Interrupt (NMI)?

• A) INT 3
• B) INT 1
• C) INT 0
• D) INT 2

In programmable interrupt controller, which of the following ports is the control port?

• A) Port 20
• B) Port 19
• C) Port 22
• D) Port 21

An End of Interrupt (EOI) signal is sent by the _____________________.

• A) programmable interrupt controller
• B) processor
• C) interrupt request
• D) interrupt handler

Which of the following is the time interval between two timer ticks?

• A) 50 ms
• B) 40 ms
• C) 55 ms
• D) 45 ms

Interrupts are __________ events.

• A) Synchronous
• B) Dependent
• C) Predictable
• D) Asynchronous

In Intel 8088, there are a total of ___________ possible interrupt vectors in an Interrupt Vector Table.

• A) 64
• B) 512
• C) 256
• D) 128

___________ is used for exporting keyboard services.

• A) INT 12
• B) INT 11
• C) INT 16
• D) INT 8

The first parallel port LPT1 has ports designated from _________ to _________.

• A) 278, 27A
• B) 378, 37A
• C) 178, 17A
• D) 478, 47A

Which of the following Interrupt Requests (IRQ) is connected to serial port COM 2?

• A) IRQ 2
• B) IRQ 1
• C) IRQ 3
• D) IRQ 0

At the end of servicing an interrupt, ______________ signal is used to inform the Programmable Interrupt Controller (PIC) about it.

• A) IOE
• B) RET n
• C) IRET
• D) EOI

The routine which executes as a result of INT instruction is called _______________.

• A) Internal System Routine
• B) Interrupt Service Routine
• C) Interrupt Vector Routine
• D) Interrupt System Routine

Which of the following interrupts is used to maintain the system time?

• A) INT 9
• B) INT 10
• C) INT 11
• D) INT 8

If the _________ flag is set, then after every instruction, a type 1 interrupt will be generated automatically.

• A) trap
• B) overflow
• C) parity
• D) carry

Which of the following formulae is used for calculating the segment address of an interrupt service routine "n"?

• A) n*4
• B) n*4+2
• C) n*2+4
• D) n*4-2