MCQ - Operating Systems & Architecture

For 3 page frames, the following is the reference string: 7 0 1 2 0 3 0 4 2 3 0 3 2 1 2 0 1 7 0 1. How many page faults does the LRU page replacement algorithm produce (including page faults when the frames were free)?

• 11

• 10

• 13

• 12

For 3 page frames, the following is the reference string: 7 0 1 2 0 3 0 4 2 3 0 3 2 1 2 0 1 7 0 1. How many page faults does the Optimal page replacement algorithm produce (including page faults when the frames were free)?

• 11

• 9

• 8

• 10

For 3 page frames, the following is the reference string: 7 0 1 2 0 3 0 4 2 3 0 3 2 1 2 0 1 7 0 1. How many page faults does the FIFO page replacement algorithm produce (including page faults when the frames were free)?

• 14

• 13

• 16

• 15

What is not a main structural element of a computer system?

• I/O modules

• Main memory

• Operating system

• Processor

Which of the following element of a computer system stores data and programs?

• I/O modules

• Processor

• Main memory

• System bus

Which of the following provides for communication among elements of a computer system?

• Main memory

• System bus

• AC

• Processor

Which of the following element of a computer system moves data between the computer and its external environment?

• Main memory

• Registers

• System bus

• I/O modules

The processor contains a single data register, called

• MAR

• IR

• PC

• AC

This register specifies a particular input/output device

• MAR

• I/OAR

• I/OBR

• PC

This register is used for the exchange of data between an I/O module and the processor

• AC

• I/OAR

• I/OBR

• IR