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GATE 2019
Computer Science & IT
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Questions and Solutions
Date of Exam : 3/2/2019
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Detailed Solutions of
GATE 2019 : Computer Science & IT
Date of Test : 03-02-2019
GENERAL APTITUDE
Q.1Q.1
Q.1 Two cars start at the same time from the same location and go in the same direction.
Q.1Q.1
The speed of the first car is 50 km/h and the speed of the second car is 60 km/h. The
number of hours it takes for the distance between the two cars to be 20 km is ________.
(a) 1 (b) 2
(c) 3 (d) 6
Ans.Ans. (b)(b)
Ans. (b)
Ans.Ans. (b)(b)
Speed of car A = 50 km/hr
Speed of car B = 60 km/hr
Since, both cars A and B are moving in same direction, the relative speed = 60 – 50
= 10 km/hr
Distance required between them = 20 km
∴ Time = Distance = 20 = 2 hrs
Speed 10
Q.2Q.2
Q.2 The expenditure on the project ________ as follows; equipments Rs. 20 lakhs, salaries
Q.2Q.2
Rs. 12 lakhs, and contingency Rs.3 lakhs.
(a) break (b) breaks
(c) breaks down (d) break down
Ans.Ans. (c)(c)
Ans. (c)
Ans.Ans. (c)(c)
‘Breaks down’ is a transitive phrasal verb which means to divide something such as
a total amount into separate parts.
Option (c) is most appropriate.
Q.3Q.3
Q.3 Ten friends planned to share equally the cost of buying a gift for their teacher. When
Q.3Q.3
two of them decided not to contribute, each of the other friends had to pay Rs. 150
more. The cost of the gift was Rs. ________.
(a) 12000 (b) 6000
(c) 3000 (d) 666
Ans.Ans. (b)(b)
Ans. (b)
Ans.Ans. (b)(b)
Let share of each student = x
Total cost of gift = 10 × x
x =8(x + 150)
x = 600
Total cost = 10 × 600 = 6000
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Detailed Solutions of
GATE 2019 : Computer Science & IT
Date of Test : 03-02-2019
Q.4Q.4
Q.4 A court is to a judge as ________ is to a teacher.
Q.4Q.4
(a) a syllabus (b) a school
(c) a student (d) a punishment
Ans.Ans. (b)(b)
Ans. (b)
Ans.Ans. (b)(b)
A ‘court’ is for a ‘judge’ as a ‘school’ is for a ‘teacher’.
Court is a place where a judge works.
Similarly, school is a place where a teacher works.
Q.5Q.5
Q.5 The search engine’s business model ________ around the fulcrum of trust.
Q.5Q.5
(a) plays (b) bursts
(c) revolves (d) sinks
Ans.Ans. (c)(c)
Ans. (c)
Ans.Ans. (c)(c)
The search engine business model revolves around the fulcrum of trust.
Fulcrum is any thing that plays a central or essential role in an activity, event, or situation.
Thus, out of the given options, ‘revolves’ is the most appropriate.
Q.6Q.6
Q.6 In a college, there are three student clubs. Sixty students are only in the Drama club.
Q.6Q.6
80 students are only in the Dance club, 30 students are only in the Maths club.
40 students are in both Drama and Dance clubs. 12 students are in both Dance and
Maths clubs, 7 students are in both Drama and Maths clubs, and 2 students are in all
the clubs. If 75% of the students in the college are not in any of these clubs, then the
total number of students in the college is ________.
(a) 225 (b) 1000
(c) 975 (d) 900
Ans.Ans. (d)(d)
Ans. (d)
Ans.Ans. (d)(d)
Dance
60 38 80
Drama 2
5 10
30
Maths
Total number of students = 60 + 80 + 30 + 38 + 5 + 10 + 2 = 225
25% = 225
⇒ 100% = 225×=100 900
25
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Detailed Solutions of
GATE 2019 : Computer Science & IT
Date of Test : 03-02-2019
Q.7Q.7
Q.7 The police arrested four criminals – P, Q, R and S. The criminals knew each other. They
Q.7Q.7
made the following statements:
P says “Q committed the crime.”
Q says “S committed the crime.”
R says “I did not do it.”
S says “What Q said about me is false.”
Assume only one of the arrested four committed the crime and only one of the statements
made above is true. Who committed the crime?
(a) R (b) P
(c) S (d) Q
Ans.Ans. (a)(a)
Ans. (a)
Ans.Ans. (a)(a)
Suffix C as criminal, NC as not criminal.
Case I:Case I:
Case I:
Case I:Case I:
Criminals P Q R S
Assumption T F F F
Result Q S R S
CNCCC
Q and R are criminal in the result is impossible because only one person committed
the crime.
Case II:Case II:
Case II:
Case II:Case II:
Criminals P Q R S
Assumption F T F F
Result Q S R S
NC C C C
S and R are criminal in the result is impossible because only one person committed
the crime.
Case III:Case III:
Case III:
Case III:Case III:
Criminals P Q R S
Assumption F F T F
Result Q S R S
NC NC NC C
S and S in the result which is contradiction. [S committed crime and same time not
NC C
committed crime which is contradiction]
Case IVCase IV::
Case IV:
Case IVCase IV::
Criminals P Q R S
Assumption F F F T
Result Q S R S
NC NC C NC
R is criminal in the result.
Hence this case satisfies only one person committed the crime.
So option (a) is correct.
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