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Q:

When is a system in safe state?

Answer

The set of dispatchable processes is in a safe state if there exists at least one temporal order in which all processes can be run to completion without resulting in a deadlock.

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Subject: Operating Systems

Q:

From well shuffled standard pack of 52 playing cards,one card is drawn. What is the probability that it is either a red card or black card?

A) 1/2	B) 3/4
C) 1	D) 1/3

Answer & Explanation Answer: C) 1

Explanation:

P(red cards)=26/52

P(black cards)=26/52

P(red or black cards)=26/52+26/52=1

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Filed Under: Probability

Q:

What is the probability that it is either a heart card or diamond card, when a card is drawn from a well shuffled standard pack of 52 playing cards?

A) 1	B) 1/2
C) 3/4	D) 1/3

Answer & Explanation Answer: B) 1/2

Explanation:

P(heart cards)=13/52

P(diamond cards)=13/52

P(heart or diamond)=13/52+13/52=1/2

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Filed Under: Probability

Q:

The effective annual rate of interest corresponding to nominal rate of 6% per annum payable half yearly is

A) 5%	B) 6%
C) 7%	D) 6.09%

Answer & Explanation Answer: D) 6.09%

Explanation:

amount=[100(1+3/100)^2]=Rs.106.09

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Filed Under: Compound Interest
Exam Prep: Bank Exams
Job Role: Bank PO

Q:

A sum of money lent at compound interest for 2 years at 20% per annum would fetch Rs.482 more, if the interest was payable half yearly than if it was payable annually . The sum is

A) 10000	B) 20000
C) 40000	D) 50000

Answer & Explanation Answer: B) 20000

Explanation:

Let sum=Rs.x

C.I. when compounded half yearly = $[x {(1 + \frac{10}{100})}^{4} - x] = \frac{4641}{10000}$

C.I. when compounded annually = $[x {(\frac{20}{100})}^{2} - x] = \frac{11}{25}$

$\frac{4641}{10000} x - \frac{11}{25} x = 482$

=> x=20000

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Filed Under: Compound Interest
Exam Prep: Bank Exams
Job Role: Bank PO

Q:

An element X forms an oxide $XO_{_{3}}$ , what ihe valency of X

A) 1	B) 2
C) 3	D) 6

Answer & Explanation Answer: D) 6

Explanation:

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Filed Under: Chemistry

Q:

Which one of the following elements is the poorest conductor of heat

A) sodium	B) lead
C) zinc	D) mercury

Answer & Explanation Answer: B) lead

Explanation:

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Filed Under: Chemistry

Q:

Which one among the following is the heaviest

A) 1 mole of water molecules	B) 1 mole of ammonia molecules
C) 1 mole of sodium atoms	D) 1 mole of hydrogen molecules

Answer & Explanation Answer: C) 1 mole of sodium atoms

Explanation:

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Filed Under: Chemistry

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