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 54738

What is a semaphore?

Motorola, Persistent, TCS,

20 53837

What is the difference between widget & gadget in Windows?

Motorola,

2 12578

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 12170

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

Wipro,

10 27907

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 7833

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

Wipro,

3 13596

Critical section is?

Patni, Wipro,

2 7078

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 7528

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 35676

In Unix inter process communication take place using?

TCS,

3 9814

What are the files in /etc directory?

TCS, Wipro,

6 16201

process id for kernell process?

TCS,

4 10343

very first process created by kernell?

TCS,

4 10766

Function entry for DLL in win3.1?

TCS,

1 6608

Un-Answered Questions { Operating Systems }

What are the command prompt commands?

1070

How does max heap work?

902

How do I search for a file?

972

Why do we need windows in computer?

824

What is the current microsoft operating system?

1028

Write syntax to set JVM Memory as min-256Mb & max 512Mb?

3032

What is an application window?

768

Is array static or dynamic?

869

Does linux have threads?

857

Is there any relation between modprobe.conf file and network devices?

866

What do you mean by slide view?

839

What is raid (redundant array of inexpensive disks)?

982

What can you tell about shell variables?

949

Is cleaning the registry necessary?

854

How treemap orders the elements if the key is a string?

905

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