Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

A fair die is rolled. consider events E = {1, 3,5} F = {2,3} and G = {2,3,4,5}. Find P(EF) and P(FE) P(EG) and P(GE) P(E∪FG) and P(E∩FG)

Answer»

A fair die is rolled. consider events E = {1, 3,5} F = {2,3} and G = {2,3,4,5}. Find
P(EF) and P(FE)

P(EG) and P(GE)

P(E∪FG) and P(E∩FG)

2.

Let f: Q → Q be a function given by f(x) = x2,then f -1(9) =

Answer»

Let f: Q → Q be a function given by f(x) = x2,then f -1(9) =


3.

what is methodologies?

Answer» what is methodologies?
4.

If a class consists of 6 periods, then the number of ways in which 5 subjects can be taught such that each subject must be allotted at least one period and no period remains vacant is

Answer»

If a class consists of 6 periods, then the number of ways in which 5 subjects can be taught such that each subject must be allotted at least one period and no period remains vacant is

5.

Choose thecorrect answer.Let Abe a square matrix of order 3 ×3, then isequal toA. B. C. D.

Answer»

Choose the
correct answer.


Let A
be a square matrix of order 3 ×
3, then
is
equal to



A.

B.

C.

D.

6.

34. The expression " cos3x + sin3x +(2sin2x-3)(sinx- cosx)", is positive for all x in the range?

Answer» 34. The expression " cos3x + sin3x +(2sin2x-3)(sinx- cosx)", is positive for all x in the range?
7.

Find the particular solution of differential equation : dydx=−x+y cos x1+sin x, given that y=1 when x=0.

Answer» Find the particular solution of differential equation :

dydx=−x+y cos x1+sin x, given that y=1 when x=0.
8.

The integral ∫2x3−1x4+x dx is equal to : (Here C is a constant of integration)

Answer»

The integral ∫2x3−1x4+x dx is equal to : (Here C is a constant of integration)

9.

ntLet A be the set of all quadrilaterals in a plane and R+ be the set of positive real numbers. Prove that the function f:A→R+ defined by f(x) = area of quadrilateral x, is many-one and onto.n

Answer» ntLet A be the set of all quadrilaterals in a plane and R+ be the set of positive real numbers. Prove that the function f:A→R+ defined by f(x) = area of quadrilateral x, is many-one and onto.n
10.

The range of intergers that can be represented by n bit 2's complement number system is

Answer»

The range of intergers that can be represented by n bit 2's complement number system is

11.

The matrix A = ⎡⎢⎢⎢⎣320120−1012032⎤⎥⎥⎥⎦ has three distinct eigen values and one of its eigen vectors is ⎡⎢⎣101⎤⎥⎦which one of the following can be anooter eigen vector of A?

Answer»

The matrix A = ⎡⎢
⎢
⎢
⎣
320120−1012032⎤⎥
⎥
⎥
⎦
has three distinct eigen values and one of its eigen vectors is ⎡⎢⎣101⎤⎥⎦



which one of the following can be anooter eigen vector of A?

12.

`tan^(-1)1+sin^(-1)(2)/(sqrt(5))+tan^(-1)3` is equal to

Answer» `tan^(-1)1+sin^(-1)(2)/(sqrt(5))+tan^(-1)3` is equal to
13.

The two equal sides of an isosceles triangle with fixed base b are decreasing at the rate of 3 cm per second. How fast is the area decreasing when the two equal sides are equal to the base?

Answer» The two equal sides of an isosceles triangle with fixed base b are decreasing at the rate of 3 cm per second. How fast is the area decreasing when the two equal sides are equal to the base?
14.

Evaluate limx→9√x=

Answer» Evaluate limx→9√x=
15.

Prove that sinx−sin3xsin2x−cos2x=2sinx

Answer» Prove that sinx−sin3xsin2x−cos2x=2sinx
16.

How draw root 5 on number line

Answer» How draw root 5 on number line
17.

Consider a vector F=4i-3j.Another vector perpendicula of F is a.4i+3j b.6j c.7k d.3i-4j

Answer» Consider a vector F=4i-3j.Another vector perpendicula of F is a.4i+3j b.6j c.7k d.3i-4j
18.

If f ( x ) = x 2 , find .

Answer» If f ( x ) = x 2 , find .
19.

Which of the following are sets? Justify our answer. (i) The collection of all months of a year beginning with the letter J. (ii) The collection of ten most talented writers of India. (iii) A team of eleven best-cricket batsmen of the world. (iv) The collection of all boys in your class. (v) The collection of all natural numbers less than 100. (vi) A collection of novels written by the writer Munshi Prem Chand. (vii) The collection of all even integers. (viii) The collection of questions in this Chapter. (ix) A collection of most dangerous animals of the world.

Answer» Which of the following are sets? Justify our answer. (i) The collection of all months of a year beginning with the letter J. (ii) The collection of ten most talented writers of India. (iii) A team of eleven best-cricket batsmen of the world. (iv) The collection of all boys in your class. (v) The collection of all natural numbers less than 100. (vi) A collection of novels written by the writer Munshi Prem Chand. (vii) The collection of all even integers. (viii) The collection of questions in this Chapter. (ix) A collection of most dangerous animals of the world.
20.

Given quadratic equations x2+5x+p=0 & 2x2+qx+12=0 have both roots common, then p+q=

Answer»

Given quadratic equations x2+5x+p=0 & 2x2+qx+12=0 have both roots common, then p+q=

21.

limx→π4f(x)−f(π4)x−π4, where f(x) = sin 2x

Answer»

limx→π4f(x)−f(π4)x−π4, where f(x) = sin 2x

22.

A car moves with a variable acceleration given by a=tan−1(t) where t is the time in seconds. Find the velocity of the car after 10 seconds, if it was initially at rest

Answer» A car moves with a variable acceleration given by a=tan−1(t) where t is the time in seconds. Find the velocity of the car after 10 seconds, if it was initially at rest
23.

If f:R→R is given by f(x)=x+1, then the value of limn→∞1n[f(0)+f(5n)+f(10n)+...+f(5(n−1)n)], is:

Answer»

If f:R→R is given by f(x)=x+1, then the value of limn→∞1n[f(0)+f(5n)+f(10n)+...+f(5(n−1)n)], is:

24.

In a three dimensional co - ordinate system P, Q and R are images of a point A(a, b, c) in the xy the yz and the zx planes respectively. If G is the centroid of triangle PQR then area of triangle AOG is (O is the origin)

Answer»

In a three dimensional co - ordinate system P, Q and R are images of a point A(a, b, c) in the xy the yz and the zx planes respectively. If G is the centroid of triangle PQR then area of triangle AOG is (O is the origin)

25.

If Am (A suffix m) denotes m th term of an A.P, then Am is

Answer»

If Am (A suffix m) denotes m th term of an A.P, then Am is

26.

The value of 16π/3∫0|sinx| dx is equal to

Answer»

The value of 16π/3∫0|sinx| dx is equal to

27.

Match the following. Graph of f(x) is given

Answer»

Match the following. Graph of f(x) is given




28.

If tan α, tan β are the roots of the equation x2 + ax + b = 0 then the value of sin2(α+β)+a sin(α+β)cos(α+β)+b cos2(α+β)=

Answer»

If tan α, tan β are the roots of the equation x2 + ax + b = 0 then the value of sin2(α+β)+a sin(α+β)cos(α+β)+b cos2(α+β)=


29.

The value of limn→∞1⋅2+2⋅3+3⋅4+⋯+n(n+1)][1−cos(2/n)]n is

Answer»

The value of limn→∞1⋅2+2⋅3+3⋅4+⋯+n(n+1)][1−cos(2/n)]n is

30.

{ Find the equation of the circle passing through the intersection of the circles }x^2+y^2=4 and }}{x^2+y^2-2x-4y+4=0 and touching the line }x+2y=0 .

Answer» { Find the equation of the circle passing through the intersection of the circles }x^2+y^2=4 and }}{x^2+y^2-2x-4y+4=0 and touching the line }x+2y=0 .
31.

The conjugate base of HSO−3 is

Answer»

The conjugate base of HSO−3 is

32.

If A and B are two skew-symmetric matrices of same order, then AB is symmetric if ______________.

Answer» If A and B are two skew-symmetric matrices of same order, then AB is symmetric if ______________.
33.

Find the coordinates of the point which divides the line segment joining the points (–2, 3, 5) and (1, –4, 6) in the ratio (i) 2:3 internally, (ii) 2:3 externally.

Answer» Find the coordinates of the point which divides the line segment joining the points (–2, 3, 5) and (1, –4, 6) in the ratio (i) 2:3 internally, (ii) 2:3 externally.
34.

Prove that [1/(sec²x-cos²x) + 1/(cosec²x-sin²x)] sin²x cos²x = (1-sin²x cos²x)/(2+sin²x cos²x)

Answer»

Prove that

[1/(sec²x-cos²x) + 1/(cosec²x-sin²x)] sin²x cos²x =

(1-sin²x cos²x)/(2+sin²x cos²x)

35.

With initial conditions solve for y(t). y′′(t)+5y′(t)+6y(t)=x(t)y(0−)=2,y′(0−)=1 and x(t)=e−tu(t)

Answer»

With initial conditions solve for y(t).

y′′(t)+5y′(t)+6y(t)=x(t)

y(0−)=2,y′(0−)=1 and x(t)=e−tu(t)


36.

If {x2−x2x,x≠0k,x=0 and if f is continuous at x=0,then k=?

Answer»

If {x2−x2x,x≠0k,x=0 and if f is continuous at x=0,then k=?


37.

If ω is a complex number stisfying ∣∣ω+1ω∣∣=2,then maximum distance of ω from origin is

Answer»

If ω is a complex number stisfying ∣∣ω+1ω∣∣=2,


then maximum distance of ω from origin is



38.

If S=[6−8210]=P+Q, where P is a symmetric & Q is a skew -symmetric matrix, then Q is

Answer»

If S=[6−8210]=P+Q, where P is a symmetric & Q is a skew -symmetric matrix, then Q is

39.

Find themaximum value of 2x3 − 24x + 107 inthe interval [1, 3]. Find the maximum value of the same function in[−3, −1].

Answer»

Find the
maximum value of 2x3 − 24x + 107 in
the interval [1, 3]. Find the maximum value of the same function in
[−3, −1].

40.

The sum of two numbers is 6 times their geometric mean, show that numbers are in the ratio .

Answer» The sum of two numbers is 6 times their geometric mean, show that numbers are in the ratio .
41.

∫dxx(log x−2)(log x−3)=f(x)+c then f(x)=

Answer»

∫dxx(log x−2)(log x−3)=f(x)+c then f(x)=



42.

If y=√x+√y+√x+√y+⋯∞, then dydx=

Answer»

If y=√x+√y+√x+√y+⋯∞, then dydx=

43.

34 Prove that cube root 2 is irrational.

Answer» 34 Prove that cube root 2 is irrational.
44.

The number of terms of G.P. 3,32,34,⋯required to give the sum 3069512 is

Answer» The number of terms of G.P. 3,32,34,⋯required to give the sum 3069512 is
45.

Taking the set of natural numbers as the universal set, write down the complements of the following sets: (i) {x: x is an even natural number} (ii) {x: x is an odd natural number} (iii) {x: x is a positive multiple of 3} (iv) {x: x is a prime number} (v) {x: x is a natural number divisible by 3 and 5} (vi) {x: x is a perfect square} (vii) {x: x is perfect cube} (viii) {x: x + 5 = 8} (ix) {x: 2x + 5 = 9} (x) {x: x ≥ 7} (xi) {x: x ∈ N and 2x + 1 > 10}

Answer»

Taking
the set of natural numbers as the universal set, write down the
complements of the following sets:



(i) {x:
x
is an even natural number}


(ii) {x:
x
is an odd natural number}


(iii) {x:
x
is a positive multiple of 3}


(iv) {x:
x
is a prime number}


(v) {x:
x
is a natural number divisible by 3 and 5}


(vi) {x:
x
is a perfect square}


(vii) {x:
x
is perfect cube}


(viii) {x:
x
+ 5 = 8}


(ix) {x:
2x
+ 5 = 9}


(x) {x:
x
≥ 7}


(xi) {x:
x
∈
N and 2x
+ 1 > 10}

46.

If matrix A=⎡⎢⎣01−14−343−34⎤⎥⎦=B+C, where B is symmetric matrix and C is skew-symmetric matrix.Then the matrices B and C are:

Answer»

If matrix A=⎡⎢⎣01−14−343−34⎤⎥⎦=B+C, where B is symmetric matrix and C is skew-symmetric matrix.

Then the matrices B and C are:

47.

Question 65How many points are marked in the figure?

Answer»

Question 65



How many points are marked in the figure?





48.

The Lagrange mean-value theorem is satisifed for f(x)=x3+5x, in the interval [1,4] at a value (round off to the second deciaml place) of x equal to2.645

Answer» The Lagrange mean-value theorem is satisifed for f(x)=x3+5x, in the interval [1,4] at a value (round off to the second deciaml place) of x equal to
  1. 2.645
49.

Find the equation of circle which touches 2x − y + 3 = 0 and pass through the points of intersection of the line x + 2y − 1 = 0 and the circle x2 + y2 − 2x + 1 = 0

Answer»

Find the equation of circle which touches 2x − y + 3 = 0 and pass through the points of intersection of the line x + 2y − 1 = 0 and the circle x2 + y2 − 2x + 1 = 0



50.

An intergrating factor of the equation (1+y+x2y)dx+(x+x3)dy=0 is

Answer»

An intergrating factor of the equation (1+y+x2y)dx+(x+x3)dy=0 is