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.

The positive integral value of n such that 1⋅21+2⋅22+3⋅23+4⋅24+…+n⋅2n=2+2n+5, is

Answer» The positive integral value of n such that 121+222+323+424++n2n=2+2n+5, is
2.

Solve cos2 A1−tan A+sin3Asin A−cos A=1+sin A cos A

Answer» Solve
cos2 A1tan A+sin3Asin Acos A=1+sin A cos A
3.

The graph of f(x)=||x−1|−1| is

Answer»

The graph of f(x)=||x1|1| is

4.

Let PQ be a focal chord of the parabola y2=4ax. The tangents to the parabola at P and Q meet at a point lying on the line y=2x+a,a>0. If chord PQ subtends an angle θ at the vertex of y2=4ax, then tan θ is equal to

Answer»

Let PQ be a focal chord of the parabola y2=4ax. The tangents to the parabola at P and Q meet at a point lying on the line y=2x+a,a>0.
If chord PQ subtends an angle θ at the vertex of y2=4ax, then tan θ is equal to

5.

In a △ABC , if tanAtanB=3, then the value of cosCcosAcosB is

Answer»

In a ABC , if tanAtanB=3, then the value of cosCcosAcosB is

6.

The integrating factor for the differential equation dydx(x+2y3)=y is

Answer» The integrating factor for the differential equation
dydx(x+2y3)=y is
7.

Which of the following function(s) has/have point of inflection?

Answer»

Which of the following function(s) has/have point of inflection?

8.

limx → 0sin(x2)ln(cos(2x2−x)) is equal to

Answer» limx 0sin(x2)ln(cos(2x2x)) is equal to
9.

Let A=Q×Q and let ∗ be a binary operation on A defined by (a,b)∗(c,d)=(ac,b+ad) for (a,b)(c,d)ϵA. Determine, whether ∗ is commutative and associative. Then, with respect to ∗ on A (i) Find the identity element in A (ii) Find the invertible elements of A.

Answer» Let A=Q×Q and let be a binary operation on A defined by (a,b)(c,d)=(ac,b+ad) for (a,b)(c,d)ϵA. Determine, whether is commutative and associative. Then, with respect to on A

(i) Find the identity element in A

(ii) Find the invertible elements of A.
10.

If a,b,c are the sides opposite to angles A,B,C of a triangle ABC, respectively and ∠A=π3, b:c=√3+1:2, then the value of ∠B−∠C is

Answer»

If a,b,c are the sides opposite to angles A,B,C of a triangle ABC, respectively and A=π3, b:c=3+1:2, then the value of BC is

11.

If the normal at the point P(ap2,2ap) meets the parabola at Q(aq2,2aq) such that the lines joining the origin to P and Q are at right angle, then

Answer»

If the normal at the point P(ap2,2ap) meets the parabola at Q(aq2,2aq) such that the lines joining the origin to P and Q are at right angle, then

12.

Find the value of x, if Given, ∣∣∣2345∣∣∣=∣∣∣x32x5∣∣∣

Answer»

Find the value of x, if

Given, 2345=x32x5

13.

∫20ex dx

Answer»

20ex dx

14.

The point on x-axis equidistant from (5, 4) and (–2, 3) is ____ .

Answer»

The point on x-axis equidistant from (5, 4) and (–2, 3) is ____ .


15.

What is the Degree of differential equation ? log (dy/dx) + x sin x =x

Answer» What is the Degree of differential equation ?
log (dy/dx) + x sin x =x
16.

tan−1{√1+x2+1x}

Answer» tan1{1+x2+1x}
17.

IF A IS A SQUARE MATRIX SUCH THAT [A]=3THEN FIND THE VALUE OF [ A,A^T]

Answer» IF A IS A SQUARE MATRIX SUCH THAT [A]=3THEN FIND THE VALUE OF [ A,A^T]
18.

If tan70∘=tan20∘+2tanA∘,then the value of A is (in degree)

Answer» If tan70=tan20+2tanA,then the value of A is (in degree)
19.

The sum of the digit in the unit’s place of four digit numbers formed using digits 3,4,5,6 taken all at a time is

Answer» The sum of the digit in the unit’s place of four digit numbers formed using digits 3,4,5,6 taken all at a time is
20.

If x=cos3θ,y=sin3θ then √1+(dydx)2=

Answer»

If x=cos3θ,y=sin3θ then 1+(dydx)2=


21.

The locus of the centre of the circle which cuts x2+y2−20x+4=0 orthogonally and touches the line x=2, is

Answer»

The locus of the centre of the circle which cuts x2+y220x+4=0 orthogonally and touches the line x=2, is

22.

The value of 2cot−112−cot−143 is

Answer»

The value of 2cot112cot143 is

23.

If α,β,γ are the roots of equation x3−6x2+11x−6=0, then find the equation whose roots are α2+β2,β2+γ2,γ2+α2 is

Answer»

If α,β,γ are the roots of equation x36x2+11x6=0, then find the equation whose roots are α2+β2,β2+γ2,γ2+α2 is

24.

If x−y=13 and cos2(πx)−sin2(πy)=12, then (x,y) can be

Answer»

If xy=13 and cos2(πx)sin2(πy)=12, then (x,y) can be

25.

Perpendicular distance of the point (3, 4, 5) from the y-axis, is [MP PET 1994, Pb. CET 2002]

Answer»

Perpendicular distance of the point (3, 4, 5) from the y-axis, is [MP PET 1994, Pb. CET 2002]


26.

Determine whether the given planes are parallel or perpendicular and in case they are neither, find the angle between them. 2x+y+3z-2=0 and x-2y+5=0

Answer»

Determine whether the given planes are parallel or perpendicular and in case they are neither, find the angle between them.

2x+y+3z-2=0 and x-2y+5=0

27.

Which one of the following hold good?

Answer»

Which one of the following hold good?

28.

The number of diagonals that can be drawn in a hexagon is

Answer» The number of diagonals that can be drawn in a hexagon is
29.

The coefficient of variance is 60 and standard deviation is 24, then Arithmatic mean is

Answer»

The coefficient of variance is 60 and standard deviation is 24, then Arithmatic mean is

30.

The value of sin2π4+sin23π4+sin25π4+sin27π4 is

Answer»

The value of sin2π4+sin23π4+sin25π4+sin27π4 is

31.

If the points (0, 1, 2), (2, –1, 3) and (1, –3, 1) are the vertices of a triangle, then the triangle is

Answer»

If the points (0, 1, 2), (2, –1, 3) and (1, –3, 1) are the vertices of a triangle, then the triangle is


32.

Find the integrals of the functions. ∫tan32x sec2xdx.

Answer»

Find the integrals of the functions.
tan32x sec2xdx.

33.

If √(1−x2n)+√(1−y2n)=a(xn−yn), then √(1−x2n1−y2n)dydx is equal to

Answer»

If (1x2n)+(1y2n)=a(xnyn), then (1x2n1y2n)dydx is equal to

34.

Statement 1 : If two lines are perpendicular, then product of their slopes is –1. Statement 2: If the product of slopes of two lines is –1, then these lines will be perpendicular.

Answer»

Statement 1 : If two lines are perpendicular, then product of their slopes is –1.
Statement 2: If the product of slopes of two lines is –1, then these lines will be perpendicular.


35.

What is the difference between locus and equation?

Answer»

What is the difference between locus and equation?

36.

In a traingle ABC ,2a2+4b2+c2=4ab+2ac, then numerical value of cosB is equal to

Answer»

In a traingle ABC ,2a2+4b2+c2=4ab+2ac, then numerical value of cosB is equal to

37.

Find the equations of the tangent and normal to the parabola y2=4 ax at the point (at2,2at).

Answer»

Find the equations of the tangent and normal to the parabola y2=4 ax at the point (at2,2at).

38.

The number of 5 digit numbers can be made from the digits 0,1,2,3,4,5 if repetition is not allowed is ___

Answer»

The number of 5 digit numbers can be made from the digits 0,1,2,3,4,5 if repetition is not allowed is ___

39.

The value of π2∫−π2x2cosx1+exdx is equal to

Answer»

The value of π2π2x2cosx1+exdx is equal to

40.

Arguments of Z = (2+i)[4i+(1+i)2] is :

Answer»

Arguments of Z = (2+i)[4i+(1+i)2] is :


41.

If a, b, c are the roots of x3 - x2 - 2004 = 0. Then the value of is equal to

Answer»

If a, b, c are the roots of x3 - x2 - 2004 = 0. Then the value of is equal to


42.

A coin is tossed 7 times. Then the probability that at least 4 consecutive heads appear is

Answer»

A coin is tossed 7 times. Then the probability that at least 4 consecutive heads appear is

43.

Two squares are chosen at random on a chessboard. The probability that they have a side in common is

Answer»

Two squares are chosen at random on a chessboard. The probability that they have a side in common is

44.

Let f(n) be the number of regions in which n coplanar circles can divide the plane. If it is known that each pair of circles intersect at two different points and no three of them have common point of intersection, then

Answer» Let f(n) be the number of regions in which n coplanar circles can divide the plane. If it is known that each pair of circles intersect at two different points and no three of them have common point of intersection, then
45.

Given standard equation of ellipse, x2a2+y2b2=1,a>b, with eccentricity e Match the following a) Focusi)(ae,0)b) Directrixii)(a,0)c) Eccentricityiii)x=aed) Verticesiv)(−ae,0)v)x=−aevi)√1−b2a2

Answer»

Given standard equation of ellipse,
x2a2+y2b2=1,a>b,
with eccentricity e
Match the following
a) Focusi)(ae,0)b) Directrixii)(a,0)c) Eccentricityiii)x=aed) Verticesiv)(ae,0)v)x=aevi)1b2a2


46.

The number of different words that can be formed using all the letters of the word 'APPLICATION' such that two vowels never come together, is

Answer»

The number of different words that can be formed using all the letters of the word 'APPLICATION' such that two vowels never come together, is

47.

The magnitude of −√4 is

Answer»

The magnitude of 4 is

48.

The number of divisors of 9600 including 1 and 9600 are

Answer»

The number of divisors of 9600 including 1 and 9600 are


49.

The integer ′k′, for which the inequality x2–2(3k–1)x+8k2–7>0 is valid for every x in R is :

Answer»

The integer
k, for which the inequality x22(3k1)x+8k27>0 is valid for every x in R is :

50.

Solve the differential equation : (x+1)dydx=2e−y−1; y(0)=0.

Answer» Solve the differential equation : (x+1)dydx=2ey1; y(0)=0.