Cognizant Interview Questions

Four whole number taken at random are multiplied together. The chance that the last digit of the product is 1, 3, 7, or 9 is ?

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Answer : A. 16/625

A brother and sister appear for an interview against two vacant posts in an office. The probability of the brother’s selection is 1/5th and that of the sister’s selections is 1/3rd. What is the probability that one of them is selected ?

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Answer : B. 2/5

A bag contains 8 red and 5 white balls. 2 balls are drawn at random. What is the probability that both are white ?

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Answer : D. 5/39

When two dice are rolled, what is the probability that the sum of the numbers appeared on them is 11 ?

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Answer : B. 1/18

The probability of drawing a red card from a deck of playing cards is ?

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Answer : D. 1/2

If the probability that A will live 15 year is 7/8 and that B will live 15 year is 9/10, then what is the probability that both will live after 15 year ?

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Answer : B. 63/80

A card is drawn from a well-shuffled pack of cards. The probability of getting a queen of club or king of the heart is ?

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Answer : B. 1/26

The probability of getting heads in both trials when a balanced coin is tossed twice will be ?

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Answer : A. 1/4

Three unbiased coins are tossed. What is the probability of getting at most two heads ?

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Answer : D. 7/8…

If log 125 / log 5 = x, then x is equal to ?

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Answer : B. 3

The value of log2(1/64) is ?

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Answer : B. -6

log10(10) + log10(100) + log10(1000) + log10(10000) + log10(100000) is equal to ?

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Answer : A. 15

If 100.3010 = 2, then find the value of log0.125 (125) ?

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Answer : B. – 699 / 301…

Find the value of log (a2 / bc) + log (b2 / ac) + log (c2 / ab) ?

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Answer : A. 0…

The simplified form of log (75/16) – 2 log (5/9) + log (32/343) is ?

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Answer : A . log 2

The value of log 9/8 – log 27/32 + log 3/4 is ?

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Answer : A . 0

What is the value of log(ab2) – log(ac) + log(abc4) – 3log(bc) ?

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Answer : D. 1…

logxY = 100 and log2x = 10, then the value of y is ?

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Answer : B. 21000…

A certain number of answer sheets can be checked in 12 days working 5 hours each day by 9 examiners. For how many hours a day should 4 examiners work to check twice the number of answer sheets in 30 days ?

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Answer : D. 9 hours

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