CS501 Final Term Solved MCQs by Junaid

Q1. A software routine performed when an interrupt is received by the computer is called as

1. Interrupt
2. Interrupt handler
3. Exception
4. Trap

Correct answer: Interrupt

Q2. Which of the following pins of the processor is designated for maskable interrupts?

1. NMI
2. MI
3. INTR

Correct answer: INTR

d. RINT 3. ET = a. CP x IC x T

b. CPI x IC x T

c. CPI / IC x T d. CPI x IC/T

Q4. By which file extension does the FALCON-A assembler loads a FALCON-A assembly file?

1. .asmfa
2. .org
3. .exe
4. .src

Correct answer: .asmfa

Q5. In which one of the following methods, does the CPU poll to identify the interrupting module and branches to an interrupt service routine on detecting an interrupt?

1. Daisy chain
2. Software poll
3. Multiple interrupt lines
4. All of given option

Correct answer: Software poll

signal has output direction with respect to printer a. O<7…0> b. STROBE# c. INT#

d. ACKNLG#

6. is said to occur when a 0 is received instead of a stop bit

a. Framing error

b. Party error c. Block error d. Over-run error

Q7. A component connected to the system bus and having control of it during a particular bus cycle is called

1. Slave component
2. Master component
3. System bus
4. Buffer component

Correct answer: Master component

8. The information about the interrupt vector is given in 8-bit from 0 to 7, which is translated to bit on the data bus

1. 16 to 32
2. 11 to 18
3. 0 to 7
4. 8 to 15

Correct answer: 16 to 32

9. An interface that can be used to connect the microcomputer bus to is called as I/O port

1. Flip flop
2. Memory
3. Peripheral devices
4. Multiplexers

Correct answer: Peripheral devices

10. allows a peripheral to read and write memory without intervention by the CPU a. Programmed I/O b. Interrupt driven I/O

c. Direct memory access(DMA)

d. Polling

11. Every interrupt handler has an interrupt return (IRET) instruction, this instruction is an example of return a. NEAR

b. FAR

c. SHORT d. RELATIVE

Q12. Which I/O technique will be used by a sound card that may need to access data stored in the computer`s RAM?

1. Programmed I/O
2. Interrupt driven I/O
3. Direct memory access(DMA)
4. Polling

Correct answer: Direct memory access(DMA)

Q13. What should be the behavior of interrupt during critical section?

1. Must remain disable
2. Must remain enable
3. Depends on current situation
4. Only important interrupts be enable

Correct answer: Must remain disable

Q14. Identify the type of serial communication error condition in which “0” is received instead of stop bit(which is always a “1”)

1. Framing error
2. Parity error
3. Overrun error
4. Under run error

Correct answer: Framing error

15. The Pentium does allow the use of some part of its accumulator register EAX

1. 8 bits
2. 16 bits
3. 32 bits
4. 64 bits

Correct answer: 32 bits

16. is an electrical pathway through which the processor communicates with the internal and external devices attached to the computer

1. Computer bus
2. Hazard
3. Memory
4. Disk