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)
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Operating Systems General Concepts (1242)
Data Structures (2039)

Operating Systems Interview Questions

Questions Answers Views Company eMail

Assume that passwords are selected from four-character combinations of 26 alphabetic characters. Assume that an adversary is able to attempt passwords at a rate of one per second. a) Assuming no feedback to the adversary until each attempt has been completed, what is the expected time to discover the correct password?

FCI,

4 19431

Assuming feedback to the adversary flugging an error as each incorrect character is entered, what is the expected time to discover the correct password?

3310

Assuming one link of the Trojan horse copy-and-observe-later chain is broken. There are two other possible angles of attack by Alice: Alice logging on and attempting to read the string directly, and alice assigning a security level of sensitive to the back-pocket file. Does the reference monitor prevent these attacks?

2814

The flushing policy is described in the subsection on process migration strategies: a) From the perspective of the source, which other strategy does flushing resembles? b) From the perspective of the target, which other strategy does flushing resemble?

2274

Directories can be implemented either as "special files" that can only be accessed in limited ways, or as ordinary data files. What are the advantages and disadvantages of each approach?

4479

Some operating system have a tree structured file system but limits the depth of the tree to some small number of levels. what effect does this limit have on users? How does this simplify file system (if it does)?

1 8964

In the token-passing mutual exclusion algorithm, is the timestamping used to reset clocks and correct drifts, as in the distributed queue algorithms? if not, what is the function of the timestamping?

HCL,

2687

How to use disk quotas in solaris (command mode) ? what is the procedure for checking disk space of the particular user in command mode?

Samsung,

7 19553

what is the back up software we r using in solaris 8,9,10

2 5841

what is windows installer

IBM, Metropolitan Health Group, Microsoft,

2 6769

what is windows installer?

2 6438

1)application programs interact with operating system through system call.is there any method of interaction between the two? 2) Inconveniences faced by user interacting with a computer systemwithout a operating system? 3) what are the requirements for virtual memory architecture

KCPL,

2 4653

how does virtual memory work?

1 6182

What is the reason for getting the dialouge box( send this error to microsoft giving options as send to microsoft and dont send ) when we abort from the any work when it was struck.

CTS, HCL,

1 4991

what are the features of Linux?

2 7587

Un-Answered Questions { Operating Systems }

What is the meaning of arraylist?

935

How do I fix msvcp140 dll missing in windows 10?

823

What is socket file in linux?

948

What is data structure and its operations?

842

How can a ddr1 ram be identified from a ddr2 ram module physically?

1000

What is ipc rtos?

1092

Write any two principles of gradation of structures.

982

How do I update windows explorer?

890

What is the main difference between wait() and sleep() method?

1061

Which is the best operating system in the world?

996

What do you mean by linear probing?

1052

What is the maximum length for any file name under linux?

961

How do I run an exe file on my laptop?

996

How do I uninstall windows operating system?

844

How install wamp on windows?

837

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