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 54311

What is a semaphore?

Motorola, Persistent, TCS,

20 53107

What is the difference between widget & gadget in Windows?

Motorola,

2 12438

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 11957

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

Wipro,

10 27525

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 7734

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

Wipro,

3 13467

Critical section is?

Patni, Wipro,

2 6912

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 7411

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 35147

In Unix inter process communication take place using?

TCS,

3 9687

What are the files in /etc directory?

TCS, Wipro,

6 15941

process id for kernell process?

TCS,

4 10183

very first process created by kernell?

TCS,

4 10620

Function entry for DLL in win3.1?

TCS,

1 6531

Un-Answered Questions { Operating Systems }

Explain LILO?

875

Explain superblock in unix.

832

When I startup my computer the screen is black?

869

How do I fix error 429?

923

What thread means?

846

What are Anonymous Calls?

1298

What is sequential search? What is the average number of comparisons in a sequential search?

770

What are types of file?

961

What is windbg tool?

845

Can I use windows 7 license for windows 10?

739

How old is unix?

864

What is the difference between diff and cmp command in unix?

967

Can I still download windows 10 for free 2019?

679

How do I put games on playonlinux?

820

Why do we use windows explorer?

856

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