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Q:

How many 4-letter words with or without meaning, can be formed out of the letters of the word, 'LOGARITHMS', if repetition of letters is not allowed?

A) 4050 B) 3600
C) 1200 D) 5040
 
Answer & Explanation Answer: D) 5040

Explanation:

'LOGARITHMS' contains 10 different letters.

 

Required number of words = Number of arrangements of 10 letters, taking 4 at a time.

 

10P4

 

= 5040.

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Q:

In how many ways a committee, consisting of 5 men and 6 women can be formed from 8 men and 10 women?

A) 11670 B) 12000
C) 11760 D) 20050
 
Answer & Explanation Answer: C) 11760

Explanation:

Required number of ways= 8C5×10C6 = (8C3×10C4)= 11760.

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Q:

The PS command prints the process status for only some of the running processes.

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

The PS command prints the process status for some or all of the running processes

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Subject: Operating Systems
Exam Prep: GATE

Q:

In how many different ways can the letters of the word 'LEADING' be arranged in such a way that the vowels always come together?

A) 720 B) 520
C) 700 D) 750
 
Answer & Explanation Answer: A) 720

Explanation:

The word 'LEADING' has 7 different letters.

When the vowels EAI are always together, they can be supposed to form one letter.

Then, we have to arrange the letters LNDG (EAI).

Now, 5 (4 + 1) letters can be arranged in 5! = 120 ways.

The vowels (EAI) can be arranged among themselves in 3! = 6 ways.

Required number of ways = (120 x 6) = 720.

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Q:

Which among the following is not aprocess state in unix?

A) Running B) Runnable
C) Zombie D) Stopped
 
Answer & Explanation Answer: B) Runnable

Explanation:

The process states of unix are running,Zombie,stopped,Waiting.

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Filed Under: Operating Systems
Exam Prep: GATE

Q:

getppid() system call is used to bias the existing priority of a process 

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

It is used to get parent process identifier

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Subject: Operating Systems
Exam Prep: GATE

Q:

Which among the following is a system call used for process management

A) fork() B) exec()
C) getppid() D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

All the above listed are the System calls for process management

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Filed Under: Operating Systems
Exam Prep: GATE
Job Role: Software Architect

Q:

Which among the following are not the children of Swapper or Scheduler?

A) Process Dispatcher B) Vhand
C) Dbflush D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

Process Dispatcher,Vhand,Dbflush are the children of Scheduler

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Filed Under: Operating Systems
Exam Prep: GATE