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

Unix Interview Questions

Questions Answers Views Company eMail

Why do I get connection refused when the server is not running?

1 2385

How can I set the timeout for the connect() system call?

1512

Why does connect() succeed even before my server did an accept()?

1 2118

How do I convert a string into an internet address?

1381

What are socket exceptions? What is out-of-band data?

1 2277

Why do I keep getting EINTR from the socket calls?

1 2103

Is there any advantage to handling the signal, rather than just ignoring it and checking for the EPIPE error? Are there any useful parameters passed to the signal catching function?

1427

How do I send [this] over a socket?

1 2234

How come select says there is data, but read returns zero?

1 2057

How can I force a socket to send the data in its buffer?

1616

What are the pros/cons of select(), non-blocking I/O and SIGIO?

1365

Why does it take so long to detect that the peer died?

1519

Why do I get EPROTO from read()?

1450

Where can a get a library for programming sockets?

1 2132

Whats the difference between select() and poll()?

1646

Un-Answered Questions { Unix }

Write a command to display a file’s contents in various formats?

1214

Is the Process before and after the swap are the same? Give reason.

1220

Which are typical system directories below the root directory?

939

How do we change file access permissions?

1135

How to know the ip address of user system?

937

Which unix command lists files/folders in alphabetical order?

1765

Explain a zombie?

1050

What pieces of information make up a socket?

957

What are the events done by the Kernel after a process is being swapped out from the main memory?

2618

What is the difference between read() and recv()?

1970

Define a process group.

923

How would you identify daemons in unix?

991

What are filter commands in unix?

1204

What are file commands?

1236

Explain the advantage of executing a process in background?

935

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