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MCQs

Total Questions : 67 | Page 4 of 7 pages
Question 31. The direction of vector A is radially outward from the origin, with |A| = krn where r2 = x2 + y2 + z2 and k is a constant. The value of n for which ∇.A = 0 is
  1.    -2
  2.    2
  3.    1
  4.    0
 Discuss Question
Answer: Option A. -> -2


-NA-


Question 32. A fair coin is tossed till a head appears for the first time. The probability that the number of required tosses is odd, is
  1.    1/3
  2.    1/2
  3.    2/3
  4.    3/4
 Discuss Question
Answer: Option C. -> 2/3


-NA-


Question 33. Let U and V be two independent and identically distributed random variables such that P(U = +1) = P(U= -1) = 1/2. The entropy H(U + V) in bits is
  1.    3/4
  2.    1
  3.    3/2
  4.    log23
 Discuss Question
Answer: Option C. -> 3/2


-NA-


Question 34. Choose the grammatically CORRECT sentence:
  1.    Two and two add four.
  2.    Two and two become four.
  3.    Two and two are four.
  4.    Two and two make four.
 Discuss Question
Answer: Option D. -> Two and two make four.


-NA-


Question 35. In the summer of 2012, in New Delhi, the mean temperature of Monday to Wednesday was 41°C
and of Tuesday to Thursday was 43°C. If the temperature on Thursday was 15% higher than that of
Monday, then the temperature in °C on Thursday was
  1.    40
  2.    43
  3.    46
  4.    49
 Discuss Question
Answer: Option C. -> 46


-NA-


Question 36. They were requested not to quarrel with others. Which one of the following options is the closest in meaning to the word quarrel?
  1.    make out
  2.    call out
  3.    dig out
  4.    fall out
 Discuss Question
Answer: Option D. -> fall out


-NA-


Question 37. Statement: You can always give me a ring whenever you need. Which one of the following is the best inference from the above statement?
  1.    Because I have a nice caller tune.
  2.    Because I have a better telephone facility.
  3.    Because a friend in need is a friend indeed.
  4.    Because you need not pay towards the telephone bills when you give me a ring.
 Discuss Question
Answer: Option C. -> Because a friend in need is a friend indeed.


-NA-


Question 38. Complete the sentence: Dare _______________ mistakes.
  1.    commit
  2.    to commit
  3.    committed
  4.    committing
 Discuss Question
Answer: Option A. -> commit


-NA-


Question 39. What is the chance that a leap year, selected at random, will contain 53 Saturdays?
  1.    2/7
  2.    3/7
  3.    1/7
  4.    5/7
 Discuss Question
Answer: Option A. -> 2/7


-NA-


Question 40. The set of values of p for which the roots of the equation 3x2+2x+p(p“1) = 0 are of opposite sign is
  1.    ("“∞, 0)
  2.    (0, 1)
  3.    (1, ∞)
  4.    (0, ∞)
 Discuss Question
Answer: Option B. -> (0, 1)


-NA-


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