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 maximum slope of the curve y=12x4−5x3+18x2−19x occurs at the point :

Answer»

The maximum slope of the curve y=12x45x3+18x219x occurs at the point :

2.

The shortest distance between the lines x−10=y+1−1=z1 and x+y+z+1=0,2x−y+z+3=0 is:

Answer»

The shortest distance between the lines x10=y+11=z1 and x+y+z+1=0,2xy+z+3=0 is:

3.

Discuss the continuity and differentiability of the fx=x+x-1 in the interval -1,2

Answer» Discuss the continuity and differentiability of the fx=x+x-1 in the interval -1,2
4.

If a circle of radius R passes through the origin O and intersects the coordinate axes at A and B, then the locus of the foot of perpendicular from O on AB is :

Answer»

If a circle of radius R passes through the origin O and intersects the coordinate axes at A and B, then the locus of the foot of perpendicular from O on AB is :

5.

A common tangent to 9x2−16y2=144 and x2+y2=9, is

Answer»

A common tangent to 9x216y2=144 and x2+y2=9, is

6.

If p=limx→∞(sin√x2+1−sin|x|) and q=limx→−∞[sin(cos(√|x|−x3)−1)](Where [.] denotes greatest integer function), then which of the following is/are correct:

Answer»

If p=limx(sinx2+1sin|x|) and q=limx[sin(cos(|x|x3)1)]

(Where [.] denotes greatest integer function), then which of the following is/are correct:


7.

3x21.x +1

Answer» 3x21.x +1
8.

The value of 6+6+6+......to ∞ is ____________.

Answer» The value of 6+6+6+......to is ____________.
9.

The shortest distance between the curves y2=x3 and 9x2+9y2–30y+16=0 is

Answer»

The shortest distance between the curves y2=x3 and 9x2+9y230y+16=0 is

10.

If π4<x<π2, then ∫ 1-sin 2x dx is equal to ______________

Answer» If π4<x<π2, then 1-sin 2x dx is equal to ______________
11.

If the magnitude of two vectors are 8 unit and 5 unit and their scalar product is zero, the angle between the two vectors is Zero 30^° 60^° 90^°

Answer» If the magnitude of two vectors are 8 unit and 5 unit and their scalar product is zero, the angle between the two vectors is Zero 30^° 60^° 90^°
12.

why sin90 =1

Answer» why sin90 =1
13.

If I=1∫0dx√4−x2−x3, then which of the following is/are TRUE?

Answer»

If I=10dx4x2x3, then which of the following is/are TRUE?

14.

f:R→R, f(x)=3x2+mx+nx2+1. If the range of f(x) is [−4,3], then

Answer» f:RR, f(x)=3x2+mx+nx2+1. If the range of f(x) is [4,3], then
15.

A unit circle with the following P coordinate is given. The value of θ is:

Answer»

A unit circle with the following P coordinate is given. The value of θ is:


16.

Let A(0,1),B(1,1),C(1,−1) and D(−1,0) be four points. If P is any other point, then the minimum value of PA+PB+PC+PD is equal to

Answer»

Let A(0,1),B(1,1),C(1,1) and D(1,0) be four points. If P is any other point, then the minimum value of PA+PB+PC+PD is equal to

17.

If tan x2=1-e1+e tan α2, then cos α=(a) 1-e cos cos x+e(b) 1+e cos xcos x-e(c) 1-e cos xcos x-e(d) cos x-e1-e cos x

Answer» If tan x2=1-e1+e tan α2, then cos α=



(a) 1-e cos cos x+e



(b) 1+e cos xcos x-e



(c) 1-e cos xcos x-e



(d) cos x-e1-e cos x
18.

Let f(x)=x⋅[x2], for −10&lt;x&lt;10, where [t] denotes the greatest integer function. Then the number of points of discontinuity of f is equal to

Answer»

Let f(x)=x[x2], for 10<x<10, where [t] denotes the greatest integer function. Then the number of points of discontinuity of f is equal to



19.

Find domain and range of the function:f(x)=x^2+3

Answer» Find domain and range of the function:f(x)=x^2+3
20.

Let f:{1, 3, 4} → {1, 2, 5} and g:{1, 2, 5} → {1, 3} be given by f ={(1, 2), (3, 5), (4, 1)} and g ={(1, 3), (2, 3), (5, 1)}. Write down gof.

Answer»

Let f:
{1, 3, 4} → {1, 2, 5} and
g:
{1, 2, 5} → {1, 3} be given by
f =
{(1, 2), (3, 5), (4, 1)} and
g =
{(1, 3), (2, 3), (5, 1)}. Write down
gof.

21.

if a continuous function f(x) does not have a root in the interval [a,b], then which one of the following statements is TRUE?

Answer»

if a continuous function f(x) does not have a root in the interval [a,b], then which one of the following statements is TRUE?

22.

integrate: 1/(x+1)(x^2+1)^2 dx

Answer» integrate: 1/(x+1)(x^2+1)^2 dx
23.

Find a vector a→ of magnitude 52, making an angle of π4 with x-axis, π2 with y-axis and an acute angle θ with z-axis. [CBSE 2014]

Answer» Find a vector a of magnitude 52, making an angle of π4 with x-axis, π2 with y-axis and an acute angle θ with z-axis. [CBSE 2014]
24.

Prove the following by using the principle of mathematical induction for all n ∈ N: 1.2 + 2.22 + 3.22 + … + n.2n = (n – 1) 2n+1 + 2

Answer»

Prove the following by using the principle of mathematical induction for all n ∈ N: 1.2 + 2.22 + 3.22 + … + n.2n = (n – 1) 2n+1 + 2

25.

囗6 In the Davisson-Germer experiment, if thescattering angle is 60^° , then glancing angle isequal to(1) 30(3) 60(2) 45^° (4) 90^°

Answer» 囗6 In the Davisson-Germer experiment, if thescattering angle is 60^° , then glancing angle isequal to(1) 30(3) 60(2) 45^° (4) 90^°
26.

For a standard hyperbolax2a2−y2b2=1Match the following. Column 1Column 21.a2&gt;b2P.Director circle is real2.a2=b2Q.Director circle is imaginary3.a2&lt;b2R.Centre is the only point from which two perpendicular tangents can be drawn on thehyperbola

Answer»

For a standard hyperbola

x2a2y2b2=1


Match the following.


Column 1Column 21.a2>b2P.Director circle is real2.a2=b2Q.Director circle is imaginary3.a2<b2R.Centre is the only point from which two perpendicular tangents can be drawn on thehyperbola



27.

If k=π∫0xsinxdx, then which of the following is/are correct ?

Answer»

If k=π0xsinxdx, then which of the following is/are correct ?

28.

If the line x−λ2−3λ=y+5λ=z+3−1 lies on the plane x+λy−2z=0, then the value of λ is equal to

Answer»

If the line xλ23λ=y+5λ=z+31 lies on the plane x+λy2z=0, then the value of λ is equal to

29.

What is the binomial conjugate of2+√52−√5+2−√52+√5+√2+1√2−1?

Answer»

What is the binomial conjugate of

2+525+252+5+2+121?

30.

sin 5x=5 cos4 x sin x-10 cos2x sin3 x+sin5 x

Answer» sin 5x=5 cos4 x sin x-10 cos2x sin3 x+sin5 x
31.

How to solve sin^-1(sinx) for the angle like 10, 20 ,30?also for same angle cos^-1(cosx) and tan^-1(tanx)?

Answer» How to solve sin^-1(sinx) for the angle like 10, 20 ,30?
also for same angle cos^-1(cosx) and tan^-1(tanx)?
32.

The integral π∫0√1+4sin2x2−4sinx2 dx equals to:

Answer»

The integral π01+4sin2x24sinx2 dx equals to:

33.

If two balanced dice are tossed once, the probability of the event, that the sum of the integers coming on the upper sides of the two dice is 9, is [MP PET 1987]

Answer»

If two balanced dice are tossed once, the probability of the event, that the sum of the integers coming on the upper sides of the two dice is 9, is [MP PET 1987]


34.

If at x = 1, y = 2x is tangent to the parabola y=ax2+bx+c, then respective values of a, b, c possible are

Answer»

If at x = 1, y = 2x is tangent to the parabola y=ax2+bx+c, then respective values of a, b, c possible are

35.

Find the equations of the lines joining the vertex of the parabola y2=6x to the point on it which have abscissa 24.

Answer»

Find the equations of the lines joining the vertex of the parabola y2=6x to the point on it which have abscissa 24.

36.

89. Find the equation of the parabola whose focus is (2,3) and whose directrix is 3x+4y=1

Answer» 89. Find the equation of the parabola whose focus is (2,3) and whose directrix is 3x+4y=1
37.

In a group of 50 people, 35 speak Hindi and 25 speak both English and Hindi. Then how many people speak only English ? (Assuming each person speaks at least one language)

Answer»

In a group of 50 people, 35 speak Hindi and 25 speak both English and Hindi. Then how many people speak only English ? (Assuming each person speaks at least one language)

38.

Q. A bag contains 4 white, 5 red, and 6 blue balls. Three balls are drawn at random. What is the probability that one ball being red, the other being blue, and the last being white are drawn simultaneously?Q. एक थैला में 4 सफेद, 5 लाल, और 6 नीली गेंदें हैं। 3 गेंदों को यादृच्छिक रूप से निकाल लिया गया है। क्या प्रायिकता है कि एक गेंद लाल, दूसरी नीली, और आखिरी सफेद एक साथ निकाली जा रही हो?

Answer»

Q. A bag contains 4 white, 5 red, and 6 blue balls. Three balls are drawn at random. What is the probability that one ball being red, the other being blue, and the last being white are drawn simultaneously?



Q. एक थैला में 4 सफेद, 5 लाल, और 6 नीली गेंदें हैं। 3 गेंदों को यादृच्छिक रूप से निकाल लिया गया है। क्या प्रायिकता है कि एक गेंद लाल, दूसरी नीली, और आखिरी सफेद एक साथ निकाली जा रही हो?

39.

2sin263°+1+2sin227°3cos217°-2+3cos273°=?(a) 23(b) 32(c) 2(d) 3

Answer» 2sin263°+1+2sin227°3cos217°-2+3cos273°=?



(a) 23



(b) 32



(c) 2



(d) 3
40.

If y=1√a2−x2,find,dydx.

Answer»

If y=1a2x2,find,dydx.

41.

The solution of the differential equation xdydx+2y=x2 (x≠0) with y(1)=1 is

Answer»

The solution of the differential equation
xdydx+2y=x2 (x0) with y(1)=1 is

42.

The length of the projection of the line joining (1, 2, 3) and (-1, 4, 2) on the line which has direction ratios (2, 3, -6) is .

Answer»

The length of the projection of the line joining (1, 2, 3) and (-1, 4, 2) on the line which has direction ratios (2, 3, -6) is .

43.

The ratio of intensity at the centre of a bright fringe to the intensity at a point dis†an ce one fourth of the dis†an ce between two successive brioghjt fringes will be

Answer» The ratio of intensity at the centre of a bright fringe to the intensity at a point dis†an ce one fourth of the dis†an ce between two successive brioghjt fringes will be
44.

The coordinates of a point are(-5,-3,2).write down the coordinates of seven points whose absolute values are the same as those of the coordinates of a given point.

Answer» The coordinates of a point are(-5,-3,2).write down the coordinates of seven points whose absolute values are the same as those of the coordinates of a given point.
45.

Which among the following is the correct graphical representation of the quadratic polynomial y=−x2−2x+3?

Answer»

Which among the following is the correct graphical representation of the quadratic polynomial y=x22x+3?

46.

The product of the real roots of the equation (x−1)4+(x−5)4=82 is

Answer»

The product of the real roots of the equation (x1)4+(x5)4=82 is

47.

37.If x=2[ ,if x=2(b+sinb) and y=2(1-cosb) then value of dy/dx is

Answer» 37.If x=2[ ,if x=2(b+sinb) and y=2(1-cosb) then value of dy/dx is
48.

Find the equation ofthe plane through the line of intersection of the planes andwhichis perpendicular to the plane

Answer»

Find the equation of
the plane through the line of intersection of the planes
and
which
is perpendicular to the plane

49.

In a geometric progression consisting of positive terms, each term equals the sum of the next two terms. Then the common ratio of the progression is ____________.

Answer» In a geometric progression consisting of positive terms, each term equals the sum of the next two terms. Then the common ratio of the progression is ____________.
50.

If f(2x + 3) = 4x2 + 12x +15, then the value of f(3x + 2) is __________ .

Answer» If f(2x + 3) = 4x2 + 12x +15, then the value of f(3x + 2) is __________ .