Operating Systems Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Windows (3805)
Linux (2255)
Unix (1304)
Solaris (894)

RTOS (43)
Bulnex (4)
Operating Systems General Concepts (1242)
Data Structures (2039)

Operating Systems Interview Questions

Questions Answers Views Company eMail

in unix profile contains

BFL,

1 9340

in unix echo is used for

BFL, BirlaSoft, Patni,

10 29142

Which of following is used for back-up files? (a) compress (b) Tar (c) make (d) all the above

Cadence,

1 5880

what does find command do ?

Cadence,

3 9305

The UNIX shell is.... a).does not come with the rest of the system b).forms the interface between the user and the kernal c) does not give any scope for programming d) deos not allow calling one program from with in another e) all of the above

IBM,

2 13867

The very first process created by the kernal that runs till the kernal process is haltes is

IBM,

6 18398

In the process table entry for the kernel process, the process id value is a) 0 b) 1 c) 2 d) 255 e) it does not have a process table entry

Aspire, IBM, Saigun Technologies,

4 23589

Which of the following API is used to hide a window a) ShowWindow b) EnableWindow c) MoveWindow d) SetWindowPlacement e)None of the above

IBM,

2 20943

The command grep first second third /usr/you/myfile a) prints lines containing the words first, second or third from the file /usr/you/myfile b) searches for lines containing the pattern first in the files second, third, and /usr/you/myfile and prints them c) searches the files /usr/you/myfiel and third for lines containing the words first or second and prints them d) replaces the word first with the word second in the files third and /usr/you/myfile e) None of the above

IBM,

4 15416

Windows NT- What NT stands for?

Mascot,

9 16932

One Gigabyte =?( 2 power30 , 2 power 20 ,2 power 10 none)

Mascot,

4 11962

DMA - abbrevation (Direct Memory Access,Discrete memory Access,Disk memoryaccess)

Mascot,

4 7895

what is FAT?.

Campus Interview, Mascot, MIS, Nile Bank,

12 21659

interprocess command in unix be achieved by a)pipes b)messages c)semaphores d)shared memory e)all

Mascot,

2 8211

How does the scheduler know the time how it should be scheduled.

Motorola,

1 8340

Un-Answered Questions { Operating Systems }

How can a vfs layer allow multiple file systems support?

1052

Why do files get corrupted?

1033

Which command allows you to duplicate files?

1124

How does a heap sort work?

975

What is gnome linux?

876

Can I have two operating systems on one computer?

1089

What is mission critical system?

1443

Why would a parent process terminate a child process?

1150

What is the example of command sentence?

1125

What is the recycle bin on windows operating systems?

888

What is rdram?

1094

When i run a programm of orphan process. Instead of getting child's parent (ppid)=1 ..i get 1400 and it varies as per system. How can i findthe right soluion??? My pgm: #include # include int main() { int pid; pid=fork(); if(pid < 0) {exit(-1);} else if(pid==0) { printf("Child Process is Sleeping ..."); sleep(10); printf("Orphan Child's Parent ID : %u ",getppid()); } else { printf("Parent Process Completed ... %u ",getpid()); exit(0); } return 0; } Output:

2321

What is the dos command to open a file?

600

How do I change c to d in cmd?

987

what is capability and capability based system?

3181

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