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

Unix Interview Questions

Questions Answers Views Company eMail

Explain fork() system call?

ASAS, IBM,

12 40679

Predict the output of the following program code main() { fork(); printf("Hello World!"); }

3 13907

What are the system calls used for process management?

3 8104

How can you get or set an environment variable from a program?

2 6834

How can a parent and child process communicate?

TCS,

3 19128

What is a zombie?

10 18248

What are the process states in Unix?

11 28534

What is a Daemon?

3 10500

What Happens when you execute a command?

3 13375

What is an advantage of executing a process in background?

2 17845

How do you execute one program from within another?

4 12188

What is IPC? What are the various schemes available?

5 20661

What is major difference between the Historic Unix and the new BSD release of Unix System V in terms of Memory Management?

1 4770

What is the difference between Swapping and Paging?

IBM,

4 54699

What is a Map?

2473

Un-Answered Questions { Unix }

What are the entities that are swapped out of the main memory while swapping the process out of the main memory?

1054

What exactly is a socket?

994

What is a filter in unix? Give an example.

970

what is wrong with this interactive shell script?

1024

Is android unix like?

1011

What is unix and why it is used?

1054

Explain the architectural differences between user-space threads, and kernel-supported threads?

1044

Explain command to view process running?

1178

Differentiate cat command from more command.

1205

What is a superuser?

996

How to terminate a shell script if statement?

1097

How to use grep command to list find the records of a file containing 10 different strings?

1194

What is the difference between cat and more command?

1364

How to find other end of unix socket connection?

927

Who is founder of unix?

1121

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