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.

Number of binary operations on the set { a , b } are (A) 10 (B) 16 (C) 20 (D) 8

Answer» Number of binary operations on the set { a , b } are (A) 10 (B) 16 (C) 20 (D) 8
2.

Why in case of substractionofvector, the angle is π-A?

Answer» Why in case of substractionofvector, the angle is π-A?
3.

The value of ∣∣∣∣411579792953∣∣∣∣ is:

Answer»

The value of
411579792953
is:

4.

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≥0 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

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


5.

For x∈R, let [x] denote the greatest integer ≤x, then the sum of the series [−13]+[−13−1100]+[−13−2100]+....+[−13−99100] is :

Answer»

For xR, let [x] denote the greatest integer x, then the sum of the series [13]+[131100]+[132100]+....+[1399100] is :

6.

Find the Cartesian equation of the following plane: r.[(s−2t)^i+(3−t)^j+(2s+t)^k]=15

Answer»

Find the Cartesian equation of the following plane:

r.[(s2t)^i+(3t)^j+(2s+t)^k]=15

7.

The solution of differential equation (1+y2)dx=(tan−1y−x)dy is(where C is integration constant)

Answer»

The solution of differential equation (1+y2)dx=(tan1yx)dy is

(where C is integration constant)

8.

Prove the following by using the principle of mathematical induction for all n ∈ N:

Answer»

Prove the following by using the principle of mathematical induction for all n ∈ N:

9.

Let P=⎡⎢⎣3−1−220α3−50⎤⎥⎦, where α∈R. Suppose Q=[qij] is a matrix satisfying PQ=kI3 for some non-zero k∈R. If q23=−k8 and |Q|=k22, then α2+k2 is equal to

Answer» Let P=31220α350, where αR. Suppose Q=[qij] is a matrix satisfying PQ=kI3 for some non-zero kR. If q23=k8 and |Q|=k22, then α2+k2 is equal to
10.

Mark the correct answer in each of the following:Which of the following is a contradiction?(a) (p ∨ q) ⇔ (p ∧ q)(b) (p ∨ q) ⇒ (p ∧ q)(c) (p ⇒ q) ∨ (q ⇒ p)(d) (~q) ∧ (p ∧ q)

Answer» Mark the correct answer in each of the following:

Which of the following is a contradiction?

(a) (p q) (p q)

(b) (p q) (p q)

(c) (p q) (q p)

(d) (~q) (p q)
11.

Statements: H G, D E, H ! E Conclusions: a) D ! H b) G © D

Answer»

Statements: H G, D E, H ! E

Conclusions:

a) D ! H

b) G © D


12.

If sin^2A + sin^4 = 1 then the value of tan^2A - tan^4A is equal to

Answer» If sin^2A + sin^4 = 1 then the value of tan^2A - tan^4A is equal to
13.

On a multiple choice examination with three possible answers for each of the five questions, what is the probability that a candidate would get four or more correct answers just by guessing?

Answer» On a multiple choice examination with three possible answers for each of the five questions, what is the probability that a candidate would get four or more correct answers just by guessing?
14.

The integer n for which limx→0(cosx−1)(cosx−ex)xn is a finite non-zero number is

Answer»

The integer n for which limx0(cosx1)(cosxex)xn is a finite non-zero number is

15.

Find the length and the foot of perpendicular from the point 1,32,2 to the plane 2x-2y+4z+5=0. [NCERT EXEMPLAR]

Answer» Find the length and the foot of perpendicular from the point 1,32,2 to the plane 2x-2y+4z+5=0. [NCERT EXEMPLAR]
16.

Let x+y=20, x,y∈W, the set of non-negative integers. If S is the maximum value of xy and the probability of xy not less than 3S4 is nm, where m and n are co-prime, then the value of n+m is

Answer» Let x+y=20, x,yW, the set of non-negative integers. If S is the maximum value of xy and the probability of xy not less than 3S4 is nm, where m and n are co-prime, then the value of n+m is
17.

Simplify and express in terms of sin α :√(-4+√(8+16〖cosec〗^(4 ) α〖sin〗^(4 ) α))

Answer» Simplify and express in terms of sin α :
√(-4+√(8+16〖cosec〗^(4 ) α〖sin〗^(4 ) α))
18.

Which of the following point(s) lies on the line x−3−2=y−23=z+14

Answer»

Which of the following point(s) lies on the line x32=y23=z+14

19.

For any real number x, let [x] denote the largest integer less than or equal to x. Let f be a real valued function defined on the interval [–10,10] by f(x)={{x}if [x] is odd,1−{x}if [x] is even, . Then the value of pi21010∫−10f(x)cosπxdx is

Answer» For any real number x, let [x] denote the largest integer less than or equal to x. Let f be a real valued function defined on the interval [10,10] by f(x)={{x}if [x] is odd,1{x}if [x] is even, . Then the value of pi2101010f(x)cosπxdx is
20.

∣∣∣∣a−b−c2a2a2bb−c−a2b2c2cc−a−b∣∣∣∣=(a+b+c)3 ∣∣∣∣x+y+2zxyzy+z+2xyzxz+x+2y∣∣∣∣=2(x+y+z)3

Answer»


abc2a2a2bbca2b2c2ccab
=(a+b+c)3


x+y+2zxyzy+z+2xyzxz+x+2y
=2(x+y+z)3

21.

tge position x of a particle with respect tp time t along x axis is given by x=9t^2-t^3 where x is in metres and t in second. what will be the position of this particle when it achieves maximum speed along the positive x directio

Answer» tge position x of a particle with respect tp time t along x axis is given by x=9t^2-t^3 where x is in metres and t in second. what will be the position of this particle when it achieves maximum speed along the positive x directio
22.

23.Integration of (1/(1+sinx))

Answer» 23.Integration of (1/(1+sinx))
23.

If A,B,C are three square matrices of third order such that A=⎡⎢⎣x020y000z⎤⎥⎦ & |B|=2232,|C|=2,x,y,z∈I+ & |adj(adjABC)|=2163874 then number of distinct possible matrices A is

Answer» If A,B,C are three square matrices of third order such that A=x020y000z & |B|=2232,|C|=2,x,y,zI+ & |adj(adjABC)|=2163874 then number of distinct possible matrices A is
24.

In a cricket tournament 16 school teams participated. A sum of Rs.16000 is to be awarded among themselves as prize money. If the team in the last place is awarded RS 550 in prize money and the award increases by the same amount for successive finishing places, how much amount will the team in the first place receive?

Answer»

In a cricket tournament 16 school teams participated. A sum of Rs.16000 is to be awarded among themselves as prize money. If the team in the last place is awarded RS 550 in prize money and the award increases by the same amount for successive finishing places, how much amount will the team in the first place receive?

25.

Let Δ(x)=∣∣∣∣x+ax+bx+a−cx+bx+cx−1x+cx+dx−b+d∣∣∣∣ and 2∫0Δ(x)dx=−16, where a,b,c,d are in A.P. Then the common difference of the A.P. can be

Answer»

Let Δ(x)=
x+ax+bx+acx+bx+cx1x+cx+dxb+d
and 20Δ(x)dx=16, where a,b,c,d are in A.P. Then the common difference of the A.P. can be

26.

dxx2 +2x +2equals(A) x tan x +1)+ C(C) tanx+C(B) tan (1) C(D)tan x +C

Answer» dxx2 +2x +2equals(A) x tan x +1)+ C(C) tanx+C(B) tan (1) C(D)tan x +C
27.

If f is a function such that f(0)=2, f(1)=3 and f(x+2)=2f(x)−f(x+1) for every real x, then the value of f(5) is

Answer»

If f is a function such that f(0)=2, f(1)=3 and f(x+2)=2f(x)f(x+1) for every real x, then the value of f(5) is

28.

A curve is given as y=x3+3x2+7. The rate of change of abscissa at a certain point is equal to 19 of the rate of change of ordinate. Which of the following denotes that point , if it is known to lie in 1st Quadrant.

Answer»

A curve is given as y=x3+3x2+7. The rate of change of abscissa at a certain point is equal to 19 of the rate of change of ordinate. Which of the following denotes that point , if it is known to lie in 1st Quadrant.

29.

All the pairs (x,y) that satisfy the inequality 2√sin2x−2sinx+5⋅14sin2y≤1 also satisfy the equation :

Answer»

All the pairs (x,y) that satisfy the inequality 2sin2x2sinx+514sin2y1 also satisfy the equation :

30.

If the sum of nterms of an A.P. is (pn + qn2), where pand q are constants, find the common difference.

Answer»

If the sum of n
terms of an A.P. is (pn + qn2), where p
and q are constants, find the common difference.

31.

The angle between planex−y+3z=5 and the line→r=(^i+^j−^k)+λ(^i−^j+^k) is

Answer»

The angle between plane

xy+3z=5 and the line

r=(^i+^j^k)+λ(^i^j+^k) is


32.

If the parabola y2 = 4ax passes through the point (3, 2), then find the length of its latus rectum.

Answer» If the parabola y2 = 4ax passes through the point (3, 2), then find the length of its latus rectum.
33.

The area(in sq.units) of the region between the curve y=asinx(a&gt;0),x-axis when 0≤x≤π, is

Answer»

The area(in sq.units) of the region between the curve y=asinx(a>0),x-axis when 0xπ, is

34.

The number of integral elements in the range of the function f(x)=[{2x+3}] is (where [.] represents the greatest integer function and {x} is the fractional part of x)

Answer» The number of integral elements in the range of the function f(x)=[{2x+3}] is
(where [.] represents the greatest integer function and {x} is the fractional part of x)
35.

a cos3 θ, ya sin3 θ at e--.45.Find the slope of the normal to the curve x

Answer» a cos3 θ, ya sin3 θ at e--.45.Find the slope of the normal to the curve x
36.

The number of integer(s) in the range of √[sgn(x)]2−{sgn(x)}2 is (where [.],{.} and sgn(x) represent the greatest integer function, fractional part function and signum function respectively)

Answer» The number of integer(s) in the range of [sgn(x)]2{sgn(x)}2 is
(where [.],{.} and sgn(x) represent the greatest integer function, fractional part function and signum function respectively)
37.

3cot 31° tan 15° cot 27° tan 75° cot 63° cot 59°

Answer» 3cot 31° tan 15° cot 27° tan 75° cot 63° cot 59°
38.

If a + b + c = 0, then the family of lines 4ax + 3by + c = 0 are concurrent at __________.

Answer» If a + b + c = 0, then the family of lines 4ax + 3by + c = 0 are concurrent at __________.
39.

If a normal to the hyperbola x2a2−y2b2=1 meets the axes at M &amp; N and the lines MP &amp; NP are drawn perpendicular to the axes meeting at P, then locus of P is

Answer»

If a normal to the hyperbola x2a2y2b2=1 meets the axes at M & N and the lines MP & NP are drawn perpendicular to the axes meeting at P, then locus of P is

40.

Show that x=-bcad is a solution of the quadratic equation ad2axb+2cdx+bc2=0.

Answer» Show that x=-bcad is a solution of the quadratic equation ad2axb+2cdx+bc2=0.
41.

The number of real solutions of the equation x^3-1=2 cuberoot(2x+1), is

Answer» The number of real solutions of the equation x^3-1=2 cuberoot(2x+1), is
42.

If (2x2−3x+1)(2x2+5x+1)=9x2, then the absolute value of the sum of all real roots of the equation is:

Answer»

If (2x23x+1)(2x2+5x+1)=9x2, then the absolute value of the sum of all real roots of the equation is:

43.

Mark the correct alternative in the following question:If A and B are two independent events such that PA=0.3 and PA∪B=0.5, then PA|B-PB|A=a 27 b 335 c 170 d 17

Answer» Mark the correct alternative in the following question:



If A and B are two independent events such that PA=0.3 and PAB=0.5, then PA|B-PB|A=a 27 b 335 c 170 d 17
44.

38. If the normal to a parabola y²=4ax at P meets the curve again in Q and if PQ and the normal at Q makes angles alpha and beta respectively with the x-axis than {tan alpha(tan alpha +tan beta)} has the value equal to

Answer» 38. If the normal to a parabola y²=4ax at P meets the curve again in Q and if PQ and the normal at Q makes angles alpha and beta respectively with the x-axis than {tan alpha(tan alpha +tan beta)} has the value equal to
45.

If 2x+15x0y2+1=x+310026, find the value of (x + y).

Answer» If 2x+15x0y2+1=x+310026, find the value of (x + y).
46.

The bar graph shows the usual method of transport to school for the students in a class. How many students are there altogether in the class?22

Answer» The bar graph shows the usual method of transport to school for the students in a class. How many students are there altogether in the class?




  1. 22
47.

Solve the following system of inequalities graphically: x + y ≤ 6, x + y ≥ 4

Answer»

Solve the following system of inequalities graphically: x + y 6, x + y 4

48.

If ω is a non-real cube root of unity, then the value of 1⋅(2−ω)(2−ω2)+2⋅(3−ω)(3−ω2)+⋯ sum upto 19 terms is

Answer»

If ω is a non-real cube root of unity, then the value of 1(2ω)(2ω2)+2(3ω)(3ω2)+ sum upto 19 terms is

49.

The middle term in the expansion of x-1x18 is ___________.

Answer» The middle term in the expansion of x-1x18 is ___________.
50.

If x4+ax3+bx2+cx+1=0 has real roots where a,b,c are negative then min(a+b+c) is equal to

Answer» If x4+ax3+bx2+cx+1=0 has real roots where a,b,c are negative then min(a+b+c) is equal to