Operating System (lesson 1)

Operating System

TYPICAL QUESTIONS & ANSWERS

Part 1

Q.1 Shell is the exclusive feature of

       (A) UNIX                    (B) DOS

       (C) System software  (D) Application software

Q.2 A program in execution is called

      (A) Process (B) Instruction

      (C) Procedure (D) Function

Q.3 Interval between the time of submission and completion of the job is

     called

      (A) Waiting time (B) Turnaround time

      (C) Throughput (D) Response time

Q.4 A scheduler which selects processes from secondary storage device is

      called

      (A) Short term scheduler. (B) Long term scheduler.

      (C) Medium term scheduler. (D) Process scheduler.

Q.5 The scheduling in which CPU is allocated to the process with least CPU-burst time

     is called

    (A) Priority Scheduling (B) Shortest job first Scheduling

    (C) Round Robin Scheduling (D) Multilevel Queue Scheduling

Q.6 The “turn-around” time of a user job is the

    (A) time since its submission to the time its results become available.

    (B) time duration for which the CPU is allotted to the job.

    (C) total time taken to execute the job.

    (D) time taken for the job to move from assembly phase to completion phase

Q.7 Program ‘preemption’ is

    (A) forced de allocation of the CPU from a program which is executing on the

     CPU.

    (B) release of CPU by the program after completing its task.

    (C) forced allotment of CPU by a program to itself.

    (D) a program terminating itself due to detection of an error.

Q.8 Which of the following is not a fundamental process state

   (A) ready (B) terminated

   (C) executing (D) blocked

Q.9 Which amongst the following is not an advantage of Distributed systems?

   (A) Reliability (B) Incremental growth

   (C) Resource sharing (D) None of the above

Q.10 Which of the following loader is executed when a system is first turned on or

   restarted

   (A) Boot loader (B) Compile and Go loader

   (C) Bootstrap loader (D) Relating loade

Q.11 Poor response time is usually caused by

   (A) Process busy

   (B) High I/O rates

   (C) High paging rates

   (D) Any of the abov

Q.12 “Throughput” of a system is

     (A) Nmber of programs processed by it per unit time

     (B) Number of times the program is invoked by the system

     (C) Number of requests made to a program by the system

     (D) None of the above

Q.13 Which scheduling policy is most suitable for a time-shared operating system

   (A) Shortest-job First. (B) Elevator.

   (C) Round-Robin. (D) First-Come-First-Serve.

Q.14 An assembly language is a

   (A) low level programming language

   (B) Middle level programming language

   (C) High level programming language

   (D) Internet based programming language

Q.15 A program in execution is called

     (A) process (B) function

     (C) CPU (D) Memory

Q.16 Jobs which are admitted to the system for processing is called

     (A) long-term scheduling (B) short-term scheduling

     (C) medium-term scheduling (D) queuing

Q.17 In which of the following page replacement policies Balady’s anomaly occurs?

     (A) FIFO (B) LRU

     (C) LFU (D) NRU

Q.18 ___________ is a technique of improving the priority of process waiting in Queue

      for CPU allocation

     (A) Starvation (B) Ageing

     (C) Revocation (D) Relocation
                            
                                                                                                                                                           R.P