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.

LET A AND B ARE TWO SETS AND GIVEN n(A)=m AND n(B)=n. ALSO TOTAL NUMBER OF SUBSET OF A IS 56 MORE THAN THAT OF B. FIND m AND n?

Answer» LET A AND B ARE TWO SETS AND GIVEN n(A)=m AND n(B)=n. ALSO TOTAL NUMBER OF SUBSET OF A IS 56 MORE THAN THAT OF B. FIND m AND n?
2.

If x tan 45° cos 60° = sin 60°cot 60° then x = ?(a) 1(b) 12(c) 12(d) 3

Answer» If x tan 45° cos 60° = sin 60°cot 60° then x = ?

(a) 1



(b) 12



(c) 12



(d) 3
3.

In a triangle ABC ,a sin (B - C )+ b sin( C - A)+ c Sin( A- B)=

Answer» In a triangle ABC ,a sin (B - C )+ b sin( C - A)+ c Sin( A- B)=
4.

Traffic on a highway is moving at a rate 360 vehicles per hour at a location. If the number of vehicles arriving on this highway follows Poisson distribution, the probability (round off to 2 decimal places) that the headway between successive vehicles lies between successive vehicles lies between 6 and 10 seconds in0.18

Answer»

Traffic on a highway is moving at a rate 360 vehicles per hour at a location. If the number of vehicles arriving on this highway follows Poisson distribution, the probability (round off to 2 decimal places) that the headway between successive vehicles lies between successive vehicles lies between 6 and 10 seconds in



  1. 0.18
5.

The fractional value of 2.357 is

Answer»

The fractional value of 2.357 is


6.

7. x,5 7 9 0 12 15

Answer» 7. x,5 7 9 0 12 15
7.

Prove that roots of the equation (x-a)(x-b)+(x-b)(x-c)+(x-c)(x-a)=0 are always real and can be equal unless a=b=c

Answer» Prove that roots of the equation (x-a)(x-b)+(x-b)(x-c)+(x-c)(x-a)=0 are always real and can be equal unless a=b=c
8.

The range of the function f(x) = logax, a > 0 is __________ .

Answer» The range of the function f(x) = logax, a > 0 is __________ .
9.

The solution of dy/dx = x²+y²+1/2xy, satisfying y(1)=1 is given byExplain step by step

Answer» The solution of dy/dx = x²+y²+1/2xy, satisfying y(1)=1 is given by



Explain step by step
10.

How many diagonals are there in a nonagon?

Answer»

How many diagonals are there in a nonagon?


11.

The solution of the differential equation x2dydx+2xy−x+1=0 given that at x = 1, y = 0 is

Answer»

The solution of the differential equation x2dydx+2xyx+1=0 given that at x = 1, y = 0 is

12.

The values of x for which the angle between the vectors →a=x^i−3^j−^k and →b=2x^i+x^j−^k is acute and the angle between the vector →b and the axis of ordinates is obtuse, are

Answer»

The values of x for which the angle between the vectors a=x^i3^j^k and b=2x^i+x^j^k is acute and the angle between the vector b and the axis of ordinates is obtuse, are

13.

​​​​​​Column IColumn IIa. If I=2∫−2(αx3+βx+γ) dx, then I is p. independent of αb. Let α,β be the distinct positive roots of the equation tanx=2x, then γ1∫0(sinαx⋅sinβx) dx ( where γ≠0) is q. independent of βc. If f(x+α)+f(x)=0, where α>0, then β+2γα∫βf(x) dx, where γ∈N, is r. independent of γs. depends on α Then which of the following is correct ?

Answer»

​​​​​​Column IColumn IIa. If I=22(αx3+βx+γ) dx, then I is p. independent of αb. Let α,β be the distinct positive roots of the equation tanx=2x, then γ10(sinαxsinβx) dx ( where γ0) is q. independent of βc. If f(x+α)+f(x)=0, where α>0, then β+2γαβf(x) dx, where γN, is r. independent of γs. depends on α
Then which of the following is correct ?

14.

Show that points are collinear

Answer» Show that points are collinear
15.

The solution of the differential equation x dydx+y=x2+3x+2 is

Answer»

The solution of the differential equation x dydx+y=x2+3x+2 is




16.

The domain of the function fx=x-2x-3 is __________ .

Answer» The domain of the function fx=x-2x-3 is __________ .
17.

in the war zone,an army †an k A is approaching the †an k B A shell is fired from †an kA with muzzle velocity v0 at an angle 37 to the horizontle at the ins†an t when †an kB is 60m away.†an kB which is moving away with velocity 60m/s is hit by shell ,then v0is

Answer» in the war zone,an army †an k A is approaching the †an k B A shell is fired from †an kA with muzzle velocity v0 at an angle 37 to the horizontle at the ins†an t when †an kB is 60m away.†an kB which is moving away with velocity 60m/s is hit by shell ,then v0is
18.

If f : R → R is given by f(x) = 2x + |x|, then f(2x) + f(–x) + 4x = _______________.

Answer» If f : R → R is given by f(x) = 2x + |x|, then f(2x) + f(–x) + 4x = _______________.
19.

The set of values of a for which the function f:R→R given by f(x)=x3+(a+2)x2+3ax+5 is one-one, is

Answer»

The set of values of a for which the function f:RR given by f(x)=x3+(a+2)x2+3ax+5 is one-one, is

20.

Let z1=2+3i and z2=3−4i. If z3 and z4 are the points which divides the line segment joining the points z1 and z2 internally and externally in the ratio of 1:2 respectively, then which of the following is/are correct?

Answer»

Let z1=2+3i and z2=34i. If z3 and z4 are the points which divides the line segment joining the points z1 and z2 internally and externally in the ratio of 1:2 respectively, then which of the following is/are correct?

21.

9.Vertices (0, ± 3), foci (0, ± 5)

Answer» 9.Vertices (0, ± 3), foci (0, ± 5)
22.

Find the coordinates of points on the parabola y2 = 8x whose focal distance is 4. [NCERT EXEMPLAR]

Answer» Find the coordinates of points on the parabola y2 = 8x whose focal distance is 4. [NCERT EXEMPLAR]
23.

In a triangle ABC, a3cos(B−C)+b3cos(C−A)+c3cos(A−B)=

Answer»

In a triangle ABC,
a3cos(BC)+b3cos(CA)+c3cos(AB)=


24.

If x and y satisfy the equation 12sinx+5cosx=2y2−8y+21, then the value of 12cot(xy2) is

Answer» If x and y satisfy the equation 12sinx+5cosx=2y28y+21, then the value of 12cot(xy2) is


25.

Effective capacity between A and B is (in μF)

Answer»

Effective capacity between A and B is (in μF)


26.

If the sum of two numbers p and q is √10 and their difference is √6, then the value of logqp is

Answer»

If the sum of two numbers p and q is 10 and their difference is 6, then the value of logqp is

27.

Find the rate at which the function f(x)=x4−2x3+3x2+x+5 changes with respect to x.

Answer» Find the rate at which the function f(x)=x42x3+3x2+x+5 changes with respect to x.
28.

Find the sum of the following series : (i) 5 + 55 + 555 + ... to n terms. (ii) 7 + 77 + 777 + ... to n terms. (iii) 9 + 99 + 9999 + ... to n terms. (iv) 0.5 + 0.55 + 0.555 + ... to n terms. (v) 0.6 + 0.66 + 0.666 + ... to n terms.

Answer»

Find the sum of the following series :

(i) 5 + 55 + 555 + ... to n terms.

(ii) 7 + 77 + 777 + ... to n terms.

(iii) 9 + 99 + 9999 + ... to n terms.

(iv) 0.5 + 0.55 + 0.555 + ... to n terms.

(v) 0.6 + 0.66 + 0.666 + ... to n terms.

29.

If esinx−e−sinx=a has alteast one real solution, then

Answer»

If esinxesinx=a has alteast one real solution, then



30.

Let n≥2 be an integer. Take n distinct points on a circle and join each pair of points by a line segment. Colour the line segment joining every pair of adjacent points by blue and the rest by red. If the number of red and blue line segments are equal, then the value of n is

Answer» Let n2 be an integer. Take n distinct points on a circle and join each pair of points by a line segment. Colour the line segment joining every pair of adjacent points by blue and the rest by red. If the number of red and blue line segments are equal, then the value of n is
31.

The number of value(s) of x satisfying sin−1(1−x)−2sin−1x=π2 is

Answer»

The number of value(s) of x satisfying sin1(1x)2sin1x=π2 is

32.

Two sets A & B are disjoint sets, if

Answer»

Two sets A & B are disjoint sets, if

33.

Mark the correct alternative in the following question:If A and B are two events such that PA=12, PB=13, PA|B=14, then PA∩B equalsa 112 b 34 c 14 d 316

Answer» Mark the correct alternative in the following question:



If A and B are two events such that PA=12, PB=13, PA|B=14, then PAB equalsa 112 b 34 c 14 d 316
34.

4. (x2 + 2.xy dy = 0

Answer» 4. (x2 + 2.xy dy = 0
35.

Set of values of ′a′ for which the equation √acosx−2sinx=√2+√2−a possesses a solution is

Answer»

Set of values of a for which the equation acosx2sinx=2+2a possesses a solution is

36.

If sin2 y+cos xy=k, find dydx at x=1, y=π4.

Answer» If sin2 y+cos xy=k, find dydx at x=1, y=π4.
37.

Prove that: cosπ5cos2π5cos4π5cos8π5=-116

Answer» Prove that: cosπ5cos2π5cos4π5cos8π5=-116
38.

Given below are the runs scored by five players. If the average runs scored by them is 146, then find the runs scored by Kuldeep.​ Name Runs Rahul 144 Suresh 155 Amar 126 Khalid 136 Kuldeep ?

Answer»

Given below are the runs scored by five players. If the average runs scored by them is 146, then find the runs scored by Kuldeep.​

Name
Runs



























Rahul 144
Suresh 155
Amar 126
Khalid 136
Kuldeep ?


39.

If A is a square matrix, using mathematical induction prove that (AT)n = (An)T for all n ∈ ℕ.

Answer» If A is a square matrix, using mathematical induction prove that (AT)n = (An)T for all n ∈ ℕ.
40.

If θ is the angle between lines whose direction ratios is given by a−b+c=0 and 3ab+bc=0, then 7cos2θ−1=

Answer» If θ is the angle between lines whose direction ratios is given by ab+c=0 and 3ab+bc=0, then 7cos2θ1=
41.

Match the conditions/expressions in Column I with statement in Column II.Let f1:R→R,f2:[0,∞]→R,f3:R→R and f4:R→[0,∞) be defined by f1(x)={|x|,if x<0ex,if x≥0f2(x)=x2;f3(x)={sinx,if x<0x, if x≥0 and f4(x)={f2[f1(x)], if x<0f2[f1(x)]−1, if x≥0Column IColumn IIa.f4 isp.onto but not one-oneb.f3 isq.neither continuous nor one-onec.f2off1 isr.differentiable but not one-oned.f2 iss.continuous and one-one

Answer»

Match the conditions/expressions in Column I with statement in Column II.



Let f1:RR,f2:[0,]R,f3:RR and f4:R[0,) be defined by f1(x)={|x|,if x<0ex,if x0f2(x)=x2;f3(x)={sinx,if x<0x, if x0 and f4(x)={f2[f1(x)], if x<0f2[f1(x)]1, if x0

Column IColumn IIa.f4 isp.onto but not one-oneb.f3 isq.neither continuous nor one-onec.f2off1 isr.differentiable but not one-oned.f2 iss.continuous and one-one



42.

The average marks of 10 students in a class was 60 with a standard deviation of 4, while the average marks of other ten students was 40 with a standard deviation of 6. If all the 20 students are taken together and σ is the combined standard deviation, then the value of [σ] is ([⋅] represents the greatest integer function)

Answer» The average marks of 10 students in a class was 60 with a standard deviation of 4, while the average marks of other ten students was 40 with a standard deviation of 6. If all the 20 students are taken together and σ is the combined standard deviation, then the value of [σ] is
([] represents the greatest integer function)
43.

List I has four entries and List II has five entries. Each entry of List I is to be matched with one or more than one entries of List II. List IList II (A)Tangents are drawn from the point (2,3)(P)(9,−6)to the parabola y2=4x. Then point(s) ofcontact is (are)(B)From a point P on the circle x2+y2=5,(Q)(1,2)the equation of chord of contact to theparabola y2=4x is y=2(x−2). Thenthe coordinates of P are(C)P(4,−4), Q are points on parabola(R)(−2,1)y2=4x such that area of △POQ is 6sq. units where O is the vertex. Thencoordinates of Q may be(D)The common chord of circle x2+y2=5(S)(4,4)and parabola 6y=5x2+7x will passthrough point(s)(T)(−2,2) Which of the following is the only CORRECT combination?

Answer» List I has four entries and List II has five entries. Each entry of List I is to be matched with one or more than one entries of List II.

List IList II (A)Tangents are drawn from the point (2,3)(P)(9,6)to the parabola y2=4x. Then point(s) ofcontact is (are)(B)From a point P on the circle x2+y2=5,(Q)(1,2)the equation of chord of contact to theparabola y2=4x is y=2(x2). Thenthe coordinates of P are(C)P(4,4), Q are points on parabola(R)(2,1)y2=4x such that area of POQ is 6sq. units where O is the vertex. Thencoordinates of Q may be(D)The common chord of circle x2+y2=5(S)(4,4)and parabola 6y=5x2+7x will passthrough point(s)(T)(2,2)

Which of the following is the only CORRECT combination?
44.

Let f(x) be a function defined on [0,2] by:where a, b and c are constants such that f(x) has second derivative at x = 1. Then a equals

Answer»

Let f(x) be a function defined on [0,2] by:


where a, b and c are constants such that f(x) has second derivative at x = 1. Then a equals


45.

Differentiate-dy/dz1. sin^3(t)Explain with all steps and with applied rule.

Answer» Differentiate-dy/dz
1. sin^3(t)
Explain with all steps and with applied rule.
46.

If px2 + qx + r = 0 has no real roots and p, q, r are real such that p + r &gt; 0 then

Answer»

If px2 + qx + r = 0 has no real roots and p, q, r are real such that p + r > 0 then


47.

In the following question, two equations I and II are given. You have to solve both the equations and choose the appropriate answer. I. 4a2 = 1 II. 4b2 - 12b + 5 = 0

Answer»

In the following question, two equations I and II are given. You have to solve both the equations and choose the appropriate answer.

I. 4a2 = 1

II. 4b2 - 12b + 5 = 0


48.

If p,q,r are the roots of the equation ax^3 + bx^2 + cx + d = 0. then find equation whose roots area] pq,qr,prb] [pq]^2,[qr]^2,[pr]^2c] p[q+r],q[p+r],r[p+q]d] pq+1/r,qr+1/p,pr+1/qe] p-1/qr,q-1/rp,r-1/pq

Answer» If p,q,r are the roots of the equation ax^3 + bx^2 + cx + d = 0. then find equation whose roots are
a] pq,qr,pr
b] [pq]^2,[qr]^2,[pr]^2
c] p[q+r],q[p+r],r[p+q]
d] pq+1/r,qr+1/p,pr+1/q
e] p-1/qr,q-1/rp,r-1/pq
49.

You are asked to construct a distance chart representing distances between cities given in a set with all the cities of the same set. What kind of matrix will come out of it?

Answer»

You are asked to construct a distance chart representing distances between cities given in a set with all the cities of the same set. What kind of matrix will come out of it?


50.

The area (in sq.units) enclosed by the curve |x2−4x+y2−6y|&lt;12 is equal to

Answer»

The area (in sq.units) enclosed by the curve |x24x+y26y|<12 is equal to