Cognizant Interview Questions
211. If 30 men can build a wall 56 meters long in 5 days, what length of a similar wall can be built by 40 men in 3 days ?
A. 36.5 m
B. 44.8 m
C. 62.3 m
D. 92 m
Answer : B. 44.8 m..
212. In a dairy farm, 20 cows eat 20 bags in 20 days. In how many days one cow will eat one bag of husk ?
A. 10 days
B. 1/10 days
C. 20 days
D. 40 days
Answer : C. 20 days...
213. If 4 men reap 40 acres in 30 days, how many acres will 18 men reap in 12 days?
A. 57 Acres
B. 64 Acres
C. 76 Acres
D. 72 Acres
Answer : D. 72 Acres...
214. 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 ?
A. 4 hours
B. 8 hours
C. 7 hours
D. 9 hours
Answer : D. 9 hours...
215. logxY = 100 and log2x = 10, then the value of y is ?
A. 210
B. 21000
C. 2100
D. 210000
Answer : B. 21000...
216. What is the value of log(ab2) - log(ac) + log(abc4) - 3log(bc) ?
A. 2
B. 0
C. -2
D. 1
Answer : D. 1...
217. The value of log 9/8 - log 27/32 + log 3/4 is ?
A. 0
B. 1
C. 2
D. 3
Answer : A. 0...
218. The simplified form of log (75/16) - 2 log (5/9) + log (32/343) is ?
A. log 2
B. 2 log 2
C. log 3
D. log 5
Answer : A. log 2...
219. Find the value of log (a2 / bc) + log (b2 / ac) + log (c2 / ab) ?
A. 0
B. 1
C. abc
D. ab2c2
Answer : A. 0...
220. The equation loga (x) + loga (1+x) = 0 can be written as ?
A. x2 + x – 1 = 0
B. x2 + x + 1 = 0
C. x2 + x – e = 0
D. x2 + x + e = 0
Answer : A. x2 + x – 1 = 0...
221. If 100.3010 = 2, then find the value of log 0.125 (125) ?
A. 699 / 301
B. – 699 / 301
C. – 1
D. – 2
Answer : B. – 699 / 301...
222. log10(10) + log10(100) + log10(1000) + log10(10000) + log10(100000) is equal to ?
A. 15
B. log 11111
C. log10(1111)
D. 14 log10(100)
Answer : A. 15...
223. The value of log2(1/64) is ?
A. 6
B. – 6
C. 7
D. None of these
Answer : B. – 6...
224. If log 125 / log 5 = x, then x is equal to ?
A. 2
B. 3
C. 4
D. 1 / 2
Answer : B. 3...
225. 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 ?
A. 1/20
B. 63/80
C. 1/5
D. None of these
Answer : B. 63/80...
226. A bag contains 8 red and 5 white balls. 2 balls are drawn at random. What is the probability that both are white ?
A. 5/16
B. 2/13
C. 3/26
D. 5/39
Answer : D. 5/39...
227. Three unbiased coins are tossed. What is the probability of getting at most two heads ?
A. 3/4
B. 1/4
C. 3/8
D. 7/8
Answer : D.7/8...
228. 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 ?
A. 1/5
B. 2/5
C. 1/3
D. 2/3
Answer : B. 2/5...
229. 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 ?
A. 16/625
B. 1/210
C. 8/125
D. 4/25
Answer : A. 16/625...
230. The probability that a card is drawn from a pack of 52 cards will form a pack of 52 cards will be diamond or king is ?
A. 4/52
B. 4/13
C. 1/52
D. 2/13
Answer : B. 4/13...
231. The probability of getting heads in both trials when a balanced coin is tossed twice will be ?
A. 1/4
B. 1/2
C. 1
D. 3/4
Answer : A. 1/4...
232. 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 ?
A. 1/52
B. 1/26
C. 1/13
D. None of these
Answer : B. 1/26...
233. The probability of drawing a red card from a deck of playing cards is ?
A. 2/18
B. 1/13
C. 1/4
D. 1/2
Answer : D. 1/2...
234. When two dice are rolled, what is the probability that the sum of the numbers appeared on them is 11 ?
A. 1/6
B. 1/18
C. 1/9
D. 1
Answer : B. 1/18...
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