GATE 2014 [Set-3]

Question 1

While trying to collect(I) an envelope from under the table(II), Mr. X fell down (III) and was losing consciousness (IV) Which one of the above underlined parts of the sentence is NOT appropriate?

A
I
B
II
C
III
D
IV
       Aptitude       Verbal
Question 1 Explanation: 
Losing consiousness represents that it is a continuous process of losing the consiousness. It is not appropriate, he just lost the consiousness.
Question 2

If she _____________ how to calibrate the instrument, she ______________ done the experiment.

A
knows, will have
B
knew, had
C
had known, could have
D
should have known, would have
       Aptitude       Verbal
Question 2 Explanation: 

Rule: If + past perfect then result to be perfect conditional (or) perfect continuous condition.
Then answer is Option C.
Question 3

Choose the word that is opposite in meaning to the word “coherent”.

A
sticky
B
well-connected
C
rambling
D
friendly
       Aptitude       Verbal
Question 3 Explanation: 
Coherent = logical and consistent
Rambling = lengthy and confused (or) inconsequential
Question 4

Which number does not belong in the series below?

2, 5, 10, 17, 26, 37, 50, 64
A
17
B
37
C
64
D
26
       Aptitude       Numerical
Question 4 Explanation: 
2, 5, 10, 17, 26, 37, 50, 64
2 = 12+1
5 = 22+1
10 = 32+1
17 = 42+1
26 = 52+1
37 = 62+1
50 = 72+1
64 = 82+0
64 does not belong to the series.
Question 5

The table below has question-wise data on the performance of students in an examination. The marks for each question are also listed. There is no negative or partial marking in the examination.

What is the average of the marks obtained by the class in the examination?

A
1.34
B
1.74
C
3.02
D
3.91
       Aptitude       Numerical
Question 5 Explanation: 
Number of students = 21+17+6 (or) 15+27+2 (or) 23+18+3 = 44
Total marks obtained = (21×2)+(15×3)+(23×2) = 133
Average marks = 133/44 = 3.02
Question 6

A dance programme is scheduled for 10.00 a.m. Some students are participating in the programme and they need to come an hour earlier than the start of the event. These students should be accompanied by a parent. Other students and parents should come in time for the programme. The instruction you think that is appropriate for this is

A
Students should come at 9.00 a.m. and parents should come at 10.00 a.m.
B
Participating students should come at 9.00 a.m. accompanied by a parent, and other parents
and students should come by 10.00 a.m.
C
Students who are not participating should come by 10.00 a.m. and they should not bring their
parents. Participating students should come at 9.00 a.m.
D
Participating students should come before 9.00 a.m. Parents who accompany them should
come at 9.00 a.m. All others should come at 10.00 a.m.
       Aptitude       Numerical
Question 6 Explanation: 
Students who are particularly in the program and they need to come an hour earlier i.e., 09.00 am because the program is start of 10.00 am.
→ All other students and parents should come in time for the programme i.e. 10.00 am.
→ Option B is correct answer.
→ In option D, they gave, all other should come at 10.00 am that includes student's parents, staff and all others. So this is not correct option.
Question 7

By the beginning of the 20th century, several hypotheses were being proposed, suggesting a paradigm shift in our understanding of the universe. However, the clinching evidence was provided by experimental measurements of the position of a star which was directly behind our sun.

Which of the following inference(s) may be drawn from the above passage?

    (i) Our understanding of the universe changes based on the positions of stars
    (ii) Paradigm shifts usually occur at the beginning of centuries
    (iii) Stars are important objects in the universe
    (iv) Experimental evidence was important in confirming this paradigm shift
A
(i), (ii) and (iv)
B
(iii) only
C
(i) and (iv)
D
(iv) only
       Aptitude       Verbal
Question 7 Explanation: 
Paradigm shift means a fundamental change in approach to something. This change, as per the question, was verified with the experimental measurements of the position of a star that was behind the sun.
(i) is incorrect as it generalizes the experimental evidence of the star and assumes it to be always true, which may not be the case every time.
(ii) and (iii) is anyway wrong.
Hence, answer is option (D).
Question 8

The Gross Domestic Product (GDP) in Rupees grew at 7% during 2012-2013. For international comparison, the GDP is compared in US Dollars (USD) after conversion based on the market exchange rate.  During the period 2012-2013 the exchange rate for the USD increased from Rs. 50/ USD to Rs. 60/ USD. India’s GDP in USD during the period 2012-2013

A
increased by 5%
B
decreased by 13%
C
decreased by 20%
D
decreased by 11%
       Aptitude       Numerical
Question 8 Explanation: 
Let,
GDP in rupees = x
GDP in dollars = x/50
Increase in GDP in rupees = 7%
∴ New GDP in rupees = 1.07x
New GDP in dollars = 1.07x/60
Change = ((1.07x/60) - (x/50))/(x/50) = -6.5/60 = -10.83%
As it is negative, the value has decreased.
GDP in VSD has decreased by 11%.
Question 9

The ratio of male to female students in a college for five years is plotted in the following line graph. If the number of female students in 2011 and 2012 is equal, what is the ratio of male students in 2012 to male students in 2011?

A
1:1
B
2:1
C
1.5:1
D
2.5:1
       Aptitude       Numerical
Question 9 Explanation: 
Given,
Male to female students ratio in 2011 = 1 : 1
Male to female students ratio in 2012 = 1.5 : 1 = 3 : 2

⇒ M1/F1 = 1:1
M1 = F1 ------- (1)
⇒ M2/F2 = 1:1
2M2 = 3F2 ------- (2)
Given,
F1 = F2 ------- (3) From (1) & (2)
M1/M2 = F1/(3F2/2) = 2F1/3F2
But from (3)
M1/M2 = 2/3
We need to find
M2 : M1 = 3 : 2 = 1.5 : 1
Question 10

Consider the equation: (7526)8 - (Y) = (4364)8, where (X)N stands for X to the base N. Find Y.

A
1634
B
1737
C
3142
D
3162
       Aptitude       Numerical
Question 10 Explanation: 
(7526)8 - (Y)8 = (4364)8
⇒ 1/8 = (7526)8 - (4364)8
Base 8 ⇒ 0 to 7 digits

When you are borrowing you will add the value of the base, hence 2 becomes (2+8) = 10
Y = 3142
Question 11

Consider the following statements:

P: Good mobile phones are not cheap
Q: Cheap mobile phones are not good
L: P implies Q
M: Q implies P
N: P is equivalent to Q

Which one of the following about L, M, and N is CORRECT?

A
Only L is TRUE.
B
Only M is TRUE.
C
Only N is TRUE.
D
L, M and N are TRUE.
       Engineering-Mathematics       Prepositional-Logic
Question 11 Explanation: 
In the given statements observe that "not cheap" & cheap, "good & not good" are used.
So, given statement can be sub divided such that we can utilize the negation of this atomic statements.
Suppose, X is Good mobile and Y is cheap then
P: (Good(x) → ~cheap(x)) → (~good(x) ∨ ~cheap(x))
Q: cheap(x) → ¬good(x) ⟺ ((¬cheap(x) ∨ good(x)) ⟺ ¬good(x) ∨ ¬cheap(x))
All these are contra positive.
All L, M, N are true.
Question 12

Let X and Y be finite sets and f: X→Y be a function. Which one of the following statements is TRUE?

A
For any subsets A and B of X, |f(A ∪ B)| = |f(A)|+|f(B)|
B
For any subsets A and B of X, f(A ∩ B) = f(A) ∩ f(B)
C
For any subsets A and B of X, |f(A ∩ B)| = min{ |f(A)|,f|(B)|}
D
For any subsets S and T of Y, f -1 (S ∩ T) = f -1 (S) ∩ f -1 (T)
       Engineering-Mathematics       Set-Theory
Question 12 Explanation: 
The function f: x→y.
We need to consider subsets of 'x', which are A & B (A, B can have common elements are exclusive).
Similarly S, T are subsets of 'y'.

To be a function, each element should be mapped with only one element.
(a) |f(A∪B)| = |f(A)|+|f(B)|
|{a,b,c}|∪|{c,d,e}| = |{a,b,c}| + |{c,d,e}|
|{a,b,c,d,e}| = 3+3
5 = 6 FALSE
(d) To get inverse, the function should be one-one & onto.
The above diagram fulfills it. So we can proceed with inverse.
f-1 (S∩T ) = f-1 (S)∩f-1 (T)
f-1 (c) = f-1 ({a,b,c})∩f-1 ({c,d,e})
2 = {1,2,3}∩{2,4,5}
2 = 2 TRUE
Question 13

Let G be a group with 15 elements. Let L be a subgroup of G. It is known that L ≠ G and that the size of L is at least 4. The size of L  is __________.

A
5
B
6
C
7
D
8
       Engineering-Mathematics       Set-Theory
Question 13 Explanation: 
Lagrange's theorem, in the mathematics of group theory, states that for any finite group G, the order (number of elements) of every subgroup H of G divides the order of G.
So, 15 is divided by {1, 3, 5, 15}.
As minimum is 4 and total is 15, we eliminate 1,3,15.
Answer is 5.
Question 14

Which one of the following statements is TRUE about every n × n matrix with only real eigenvalues?

A
If the trace of the matrix is positive and the determinant of the matrix is negative, at least one of its eigenvalues is negative.
B
If the trace of the matrix is positive, all its eigenvalues are positive.
C
If the determinant of the matrix is positive, all its eigenvalues are positive.
D
If the product of the trace and determinant of the matrix is positive, all its eigenvalues are positive.
       Engineering-Mathematics       Linear-Algebra
Question 14 Explanation: 
The sum of the n eigenvalues of A is the same as the trace of A (that is, the sum of the diagonal elements of A).
• The product of the n eigenvalues of A is the same as the determinant of A. •
A: Yes, for sum to be negative there should be atleast one negative number.
B: There can be one small negative number and remaining positive, where sum is positive.
C: Product of two negative numbers is positive. So, there no need of all positive eigen values.
D: There is no need for all eigen values to be positive, as product of two negative numbers is positive.
Question 15

If V1 and V2 are 4-dimensional subspace of a 6-dimensional vector space V, then the smallest possible dimension of V1∩V2   is ______.

A
2
B
3
C
4
D
5
       Engineering-Mathematics       Set-Theory
Question 15 Explanation: 
In a 6 dimensional vector space, sub space of 4 dimensional subspace V1, V2 are provided. Then the V1∩V2?
For eg: a two dimensional vector space have x, y axis. For dimensional vector space, it have x, y, z axis.
In the same manner, 6 dimensional vector space has x, y, z, p, q, r (assume).
Any subspace of it, with 4 dimensional subspace consists any 4 of the above. Then their intersection will be atmost 2.
[{x,y,z,p} ∩ {r,q,p,z}] = #2
V1 ∩ V2 = V1 + V2 - V1 ∪ V2 = 4 + 4 + (-6) = 2
Question 16

If , then the value of k is equal to ________.

A
4
B
5
C
6
D
7
       Engineering-Mathematics       Calculus
Question 16 Explanation: 
The graph x.Sinx from 0 to 2π is

We have |xSinx|,

We can observe that it is positive from 0 to π and negative in π to 2π.
To get positive value from π to 2π we put ‘-‘ sign in the (π, 2π)
There are 16 questions to complete.

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