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

Windows (3805)
Linux (2255)
Unix (1343)
Solaris (894)

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

Operating Systems Interview Questions

Questions Answers Views Company eMail

what is the importance of swap memory and how it will supports?

2280

what is the roles and responsibilities in linux system admin having 2yrs exp..?

HCL, RNF Technologies,

4197

can any one send me one project on linux ...?

Verizon,

2778

why it is difficult to store linked list as an array?

1 3192

discuss the procedures to evaluate disk excess time

Wipro,

2588

how to create tree of processes. one parent and 3 childs.

HCL,

1 5265

How to know whether the message queue is empty or not.

Fibcom, HCL,

1 3567

What is Inode.

HCL,

2 5442

what are the stands for OAB(offline address book) in exchange server?

DELL, Microsoft,

1 5230

What is the difference between ext3 and ext4?

IBM,

2465

Why is it suggested to disable journalism in ext4 filesystem?

IBM, TCS,

3575

I have one flat file,in this file how many columns are there i don't know,but one ename column is there , just i want to cut the surname, so how to cut the surname, any one know the answer please guide me ? ename ----- tapan kumar nayak bala murugan kutal chkrobarthy biswo My output is like that OUTPUT ------ nayak murugan chakrobarthy biswo

Cap Gemini,

3487

"ls" command is showing all the subdirectoary and files which are present in the current directoary, i want to cut only directoary name. How to cut only name ?

Cap Gemini,

2 4633

There is some data related to temperatures of different cities. One side(thread), will be updating the values and multiple clients will be reading the values. how do you achieve synchronization?

IMS, Sapient,

1 4350

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:

2265

Un-Answered Questions { Operating Systems }

Name a service that you should disable (which acts both as web and ftp server) on a linux server?

1048

How do I boot from usb on windows 10 hp laptop?

816

How do I set up my email on windows 10?

830

Give the command for finding the current date.

1108

What is the command to check cpu speed in linux?

1024

Your default umask is 002. What does this mean?

853

Explain cannot copy (file name)- access is denied?

1096

Why do we need windows?

889

How do I put windows 10 into safe mode?

890

Explain how a TP Monitor manages memory and processor resources more effectively than a typical operating system.

1960

How many os are there?

962

Is unix a kernel?

920

How nfs server works in linux?

987

Give the brief about aix.

What is the general format of unix command syntax?

1940

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