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Q:

If a box contains 10 bulbs,of which just three are defective. If a random sample of five bulbs is drawn, find the probability that the sample contains no defective bulbs.

A) 5/12	B) 7/12
C) 3/14	D) 1/12

Answer & Explanation Answer: D) 1/12

Explanation:

Total number of elementary events = $10 C_{5}$

Number of ways of selecting no defective bulbs i.e., 5 non-defective bulbs out of 7 is $7 C_{5}$ .

So,required probability = $7 C_{5}$ / $10 C_{5}$ = 1/12.

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Filed Under: Probability

Q:

A is the brother of B. B is the brother of C. D is the father of A. Based on these three statements, which of the following statements cannot be definitely true ?

A) B is the brother of A.	B) B is the son of D.
C) A is the brother of C.	D) C is the brother of A.

Answer & Explanation Answer: D) C is the brother of A.

Explanation:

A is the brother of B and B is the brother of C. So, C may be the brother or sister of A.

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Filed Under: Blood Relations

Q:

Assume that money can be invested at 8% compounded quarterly,which is larger,$2500 now or $3800 in 5 years?

A) 1557.29	B) 2557.29
C) 2567	D) 2457

Answer & Explanation Answer: B) 2557.29

Explanation:

First find the present value of $3800,then compare present values:

M = p(1+i/4)^4n

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

Q:

Derrick's dad bought new tires for $900 using a credit card. His card has an interest rate of 19%. If he has no other charges on his card and does not pay off his balance at the end of the month, how much money will he owe after one month?

A) 11.25	B) 13.25
C) 14.25	D) 15.25

Answer & Explanation Answer: C) 14.25

Explanation:

I=prt

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

Q:

If two letters are taken at random from the word HOME, what is the probability that none of the letters would be vowels?

A) 1/6	B) 1/2
C) 1/3	D) 1/4

Answer & Explanation Answer: A) 1/6

Explanation:

P(first letter is not vowel) = $\frac{2}{4}$

P(second letter is not vowel) = $\frac{1}{3}$

So, probability that none of letters would be vowels is = $\frac{2}{4} \times \frac{1}{3} = \frac{1}{6}$

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Filed Under: Probability

Q:

What is the difference between routable and non- routable protocols?

Answer

Routable protocols can work with a router and can be used to build large networks. Non-Routable protocols are designed to work on small, local networks and cannot be used with a router

Workspace

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Subject: Networking
Job Role: Database Administration

Q:

Explain Belady's Anomaly?

Answer

Also called FIFO anomaly. Usually, on increasing the number of frames allocated to a process virtual memory, the process execution is faster, because fewer page faults occur. Sometimes, the reverse happens, i.e., the execution time increases even when more frames are allocated to the process. This is Belady's Anomaly. This is true for certain page reference patterns.

Workspace

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Subject: Operating Systems

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%

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