Khalid - Operating System MCQs: MCQSs In Operating System (1500 + MCQs)

Operating System MCQs

Operating System MCQs

Operating System MCQs

Muhammad Zubair Khalid

Chapter 1: Processes ........................................................................................................................................ 4
1.1 Basic ........................................................................................................................................................... 4
1.2 Processes .................................................................................................................................................. 4
1.3 Process Control Block ........................................................................................................................... 5
1.4 Process Scheduling Queues ................................................................................................................ 6
1.5: Process Synchronization ..................................................................................................................... 7
1.6: Process Creation .................................................................................................................................... 8
1.7: Inter Process Communication ............................................................................................................ 8
Chapter 2: Distributed Communication ...................................................................................................... 10
2.1: Remote Procedure Calls ..................................................................................................................... 10
2.2: Process Structures .............................................................................................................................. 10
Chapter 3: CPU Scheduling ........................................................................................................................... 12
3.1: CPU Scheduling .................................................................................................................................... 12
3.2: CPU Scheduling Benefits ................................................................................................................... 12
3.3.1: CPU Scheduling Algorithms-1 ....................................................................................................... 13
3.3.2: CPU Scheduling Algorithms-2 ....................................................................................................... 14

8.1: RTOS
........................................................................................................................................................ 37

12.6: Interface Protection
........................................................................................................................... 64

Chapter 1: Processes
1.1 Basic

1.What is operating system?
a) collection of programs that manages hardware resources
b) system service provider to the application programs
c) link to interface the hardware and application programs
d) all of the mentioned
2. To access the services of operating system, the interface is provided by the

a) system calls
b) API
c) Library
d) assembly instructions

3. Which one of the following is not true? a) kernel is the program that constitutes the central core of the operating system b) kernel is the first part of operating system to load into memory during booting

c) kernel is made of various modules which cannot be loaded in running operating system

d) kernel remains in the memory during the entire computer session
4. Which one of the following error will be handle by the operating system?

a) power failure
b) back of paper in printer
c) connection failure in the network
d) all of the mentioned

5. The main function of the command interpreter is
a) to get and execute the next user-specified command
b) to provide the interface between the API and application program
c) to handle the files in operating system d) none of the mentioned
d) none of the mentioned

7. If a process fails, most operating system write the error information to a

a) log file
b) another running process
c) new file
d) none of the mentioned

8. Which facility dynamically adds probes to a running system, both in user processes and in the kernel?

a) DTrace
b) DLocate
c) DMap
d) DAdd

9. Which one of the following is not a real time operating system?

a) VxWorks
b) Windows CE
c) RTLinux
d) Palm OS

10. The OS X has
a) monolithic kernel
b) hybrid kernel
c) microkernel
d) monolithic kernel with modules

Questions 1 2 3 4 5 6 7 8 9 10 Answers d a c d a c a a d b

1.2 Processes

6. By operating system, the resource management can be done via

a) time division multiplexing b) space division multiplexing c) both (a) and (b

1. The systems which allows only one process execution at a time, are called

a) uni-programming systems b) uni-processing systems
c) uni-tasking systems
d) none of the mentioned

2. In operating system, each process has its own

a) address space and global variables b) open files
c) pending alarms, signals and signal

handlers
d) all of the mentioned

10. The address of the next instruction to be executed by the current process is provided by the

a) b) c) d) CPU registers program counter process stack pipe

Questions 1 2 3 4 5 6 7 8 9 3. In Unix, which system call creates the new process?

a) Fork
b) Create
c) New
d) none of the mentioned

Answers a d a d a b a d a b

1.3 Process Control Block

4. A process can be terminated due to

a) normal exit
b) fatal error
c) killed by another process
d) all of the mentioned

5. What is the ready state of a process?

a) when process is scheduled to run after some execution
b) when process is unable to run until some task has been completed
c) when process is using the CPU
d) none of the mentioned

6. What is inter-process communication?

a) communication within the process b) communication between two process c) communication between two threads of

same process
d) none of the mentioned
7. A set of processes is deadlock if

a) each process is blocked and will remain so forever
b) each process is terminated
c) all processes are trying to kill each other
d) none of the mentioned

8. A process stack does not contain

a) function parameters
b) local variables
c) return addresses
d) PID of child process

9. Which system call returns the process identifier of a terminated child?

a) Wait
b) Exit
c) Fork
d) get