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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 17596

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

 2862

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?

 2392

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?

 1813

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?

 4016

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 8036

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,

2281

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 17485

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

 2 4911

what is windows installer

IBM, Metropolitan Health Group, Microsoft,

2 5666

what is windows installer?

 2 5489

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 3714

how does virtual memory work?

 1 5515

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 4027

what are the features of Linux?

 2 6540

Un-Answered Questions { Operating Systems }

Why linux is so popular?

454

What does snmp stands for?

3

How do I install linux?

467

Explain what is binary search?

540

Are the expressions arr and &arr same for an array of integers?

566




Is hashtable fail fast?

448

What is yum in linux?

455

What is system unit?

584

What are necessary conditions for dead lock?

586

How can I tell what programs are running in the background on my computer?

563

What does af_inet stand for?

680

Can I change operating systems on my laptop?

563

What command would you use to check how much memory is being used by linux?

556

Tel me step By Step while accessing the webmail and outlook for all the user's it is asking the user name and password frequently ?

1699

How do I get to the root directory?

612

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