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

Unix Interview Questions

Questions Answers Views Company eMail

solaris Run level?

3 6262

boot process?

2 7576

Assume that there are two different filesystems as /abc and /xyz. There is a file A under filesystem /abc which has to be linked to filesystem /xyz. Which link will you use - soft link or hard link? why?

Accenture,

1 5963

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

HCL,

1 5194

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

Fibcom, HCL,

1 3479

What is Inode.

HCL,

2 5349

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,

3452

"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 4549

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:

2217

How do Sockets Work?

1 2472

What is with the second parameter in bind()?

1 2500

If bind() fails, what should I do with the socket descriptor?

1 3026

When should I use shutdown()?

Wipro,

1 2591

What are Sockets?

1 2388

How can I tell when a socket is closed on the other end?

1307

Un-Answered Questions { Unix }

What command will change your prompt to myprompt?

1269

Write a shell script that requests the user's age and then echoes it, along with some suitable comment.

1382

What are the bits that support the demand paging?

941

What is af_unix?

813

Explain the different kinds of threads?

994

Differentiate cat command from more command.

1097

briefly describe the shell's responsibilities?

1210

How many unix commands are there?

1118

What are the general commands in using unix os for a beginner?

1128

How would you explain a kernel to a non-technical person?

902

Why is grep called grep?

1243

What is the difference between a single dot and double dot in unix?

1154

What is unix portability?

889

What is the working set of a process?

988

How would you display the last line of a file?

875

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