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Category Archives: ISRO

Consider the schema Sailors(sid, sname, rating, age) with the following data sid sname rating age 22 Dustin 7 45 29 Borg 1 33 31 Pathy… Read More
If vectors and are perpendicular to each other, then value of λ is (A) 2/5 (B) 2 (C) 3 (D) 5/2 Answer: (D) Explanation: Given,… Read More
The function f: [0,3]→[1,29] defined by f(x) = 2x3 – 15x2 + 36x + 1 is (A) injective and surjective (B) surjective but not injective… Read More
The number of elements in the power set of { {1, 2}, {2, 1, 1}, {2, 1, 1, 2} } is (A) 3 (B) 8… Read More
If T(x) denotes x is a trigonometric function, P(x) denotes x is a periodic function and C(x) denotes x is a continuous function then the… Read More
The proposition (P⇒Q)⋀(Q⇒P) is a (A) tautology (B) contradiction (C) contingency (D) absurdity Answer: (C) Explanation: (P⇒Q)⋀(Q⇒P) = (¬P+Q)(¬Q+P) = (¬P¬Q + ¬PP + ¬QQ… Read More
Let f(x) = log|x| and g(x) = sin x . If A is the range of f(g(x)) and B is the range of g(f(x)) then… Read More
If x = -1 and x = 2 are extreme points of f(x) = α log |x| + β x2 + x then (A) α… Read More
A bag contains 19 red balls and 19 black balls. Two balls are removed at a time repeatedly and discarded if they are of the… Read More
Consider the set of integers I. Let D denote “divides with an integer quotient” (e.g. 4D8 but 4D7). Then D is (A) Reflexive, not symmetric,… Read More
Suppose A is a finite set with n elements. The number of elements and the rank of the largest equivalence relation on A are (A)… Read More