OS

Question

Which of following is multi-user and multitasking operating system ?

1. MS-DOS
2. WINDOWS
3. MAC OS X
4. UNIX

Comments

all of them.

Answer 1

Ans 4. UNIX

1 MS DOS is multitasking

see here

2.WINDOWS (9X) - Multitasking , Single user

see here

3. MAC OS X - Multiuser

see here

4. UNIX - is multiuser, multitasking

see here

Comments

@srestha

It has not mentioned any specific version, so we shall assume it to be the latest one.

You can check those two Wikipedia links i provided before, as everyone trust wikipedia.

Any modern operating system now a days is both muti-user and multi-tasking.

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But in this link given that

https://en.wikipedia.org/wiki/Multi-user

multi-user operating systems such as Windows versions from the Windows NT family support simultaneous access by multiple users .

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That is exactly what multi-user means.

When multiple users are accessing the OS at the same time it is called multi-user.

When multiple processes are accessing the CPU at the same time it is called muti-tasking.

Both of them are same conceptually but used in different context.

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@srestha Dude instead of posting google search link, post the webpage, which have good concrete explanation. This is a bad practice.

Answer 2

Multi-User means time sharing where several users can access the OS at the same time.

Multi-Tasking means executing several tasks (multiple processes accessing the CPU at the same time).

Both the terminologies are same conceptually (concurrent execution) but used in different context.

Now coming to the question, all four of them are multi-user and multi-tasking.

Reference:

https://en.wikipedia.org/wiki/Multi-user

https://en.wikipedia.org/wiki/Computer_multitasking

Comments

I hope u got ur answer

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@sourav chk my answer

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difference between multiuser and multitasking here

http://www.allinterview.com/showanswers/14282/distinguish-between-multi-tasking-multi-user-multi-processing-and-time-sharing.html