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

Windows (3805)
Linux (2255)
Unix (1304)
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 55177

What is a semaphore?

Motorola, Persistent, TCS,

20 54671

What is the difference between widget & gadget in Windows?

Motorola,

2 12730

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 12397

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

Wipro,

10 28269

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 7913

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

Wipro,

3 13746

Critical section is?

Patni, Wipro,

2 7232

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 7638

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 36208

In Unix inter process communication take place using?

TCS,

3 9977

What are the files in /etc directory?

TCS, Wipro,

6 16499

process id for kernell process?

TCS,

4 10524

very first process created by kernell?

TCS,

4 10950

Function entry for DLL in win3.1?

TCS,

1 6700

Un-Answered Questions { Operating Systems }

What is the command to view process running?

1159

Which is the recommended size for the swap space partition?

998

What is the advantage of linux operating system?

892

What is the time complexity of selection sort?

912

how can I clone the rootvg?

Why do we use hashset?

998

Is it dangerous to open spam emails?

1069

What is the difference between internal commands and external commands?

1106

how many vgs can be created in a lvm?

Why do we need socket programming?

927

How do I reinstall windows update?

882

How can a user login to solaris? What is the login shell?

1089

How do I know if my ssd is corrupted?

1004

What is RR scheduling algorithm?

1206

What is the purpose of online help?

905

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