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(EFG) and P(EFG)

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 2x31x4+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 =

3201201012032

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 limx9x=
15.

Prove that sinx−sin3xsin2x−cos2x=2sinx

Answer» Prove that sinxsin3xsin2xcos2x=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»

limxπ4f(x)f(π4)xπ4, 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=tan1(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:RR is given by f(x)=x+1, then the value of limn1n[f(0)+f(5n)+f(10n)+...+f(5(n1)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/30|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 limn12+23+34++n(n+1)][1cos(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 HSO3 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)=etu(t)


36.

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

Answer»

If {x2x2x,x0k,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=[68210]=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 x2)(log x3)=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=011434334=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