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 deadlock? How do you avoid it?

HCL, Motorola,

9 54788

What is a semaphore?

Motorola, Persistent, TCS,

20 53940

What is the difference between widget & gadget in Windows?

Motorola,

2 12596

abcD+abcd+aBCd+aBCD then the simplified function is ( Capital letters are copliments of corresponding letters A=compliment of a) [a] a [b] ab [c] abc [d] a(bc)* [e] mone (bc)*=compliment of bc

NDS, Wipro,

6 12181

A 12 address lines maps to the memory of [a] 1k bytes [b] 0.5k bytes [c] 2k bytes [d] none

Wipro,

10 27965

In a compiler there is 36 bit for a word and to store a character 8bits are needed. IN this to store a character two words are appended .Then for storing a K characters string, How many words are needed. [a] 2k/9 [b] (2k+8)/9 [c] (k+8)/9 [d] 2*(k+8)/9 [e] none

Wipro,

1 7841

Virtual memory size depends on [a] address lines [b] data bus [c] disc space [d] a & c [e] none

Wipro,

3 13623

Critical section is?

Patni, Wipro,

2 7103

If A>B then F=F(G); else B>C then F=G(G); in this , for 75% times A>B and 25% times B>C then,is 10000 instructions are there ,then the ratio of F to G [a] 7500:2500 [b] 7500:625 [c] 7500:625 if a=b=c else 7500:2500

Wipro,

2 7531

Virtual memory size depends on [a] address lines [b] data bus [c] disc space [d] a & c [e] none

Infosys, SafeNet, Satyam, TCS, VIT Infotech, Wipro,

15 35729

In Unix inter process communication take place using?

TCS,

3 9833

What are the files in /etc directory?

TCS, Wipro,

6 16236

process id for kernell process?

TCS,

4 10358

very first process created by kernell?

TCS,

4 10786

Function entry for DLL in win3.1?

TCS,

1 6617

Un-Answered Questions { Operating Systems }

What does isempty() member method determines?

933

What are bash commands?

1169

There is a program which inserts and deletes node in a sorted singly linked list. There is a bug in one of the modules, how would you debug it?

1708

What is file and example?

1070

How do I insert a file path?

976

How do you access the values within an array?

1064

How do I check chkdsk results windows 7?

914

What is pipelining in reference to ram?

1051

How do you force delete a file?

973

State the difference between stacks and linked lists?

989

List some applications of queue data structure.

930

State the advantages of using infix notations?

1198

Describe the root account?

1037

What is windows daemon?

1112

Differentiate between push and pop?

1265

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