GATE CS (Computer Sc. and Information Technology) Question Paper 2020 Download Free PDF

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SAMPLE QUESTIONS

Q1. Which one of the following is used to represent the supporting many-one relationships of a weak entity-relationship diagram?

(A) Diamond with double/bold border
(B) Rectangles with double/bold border
(C) Ovals with double/bold border
(D) Ovals that contain underlined indentifiers

Q2. Two straight lines are drawn perpendicular to each others in X-Y plane. If α and β are the acute angles the straight lines with the X-axis, then α + β is _______.

(A) 60°
(B) 90°
(C) 120°
(D) 180°

Q3. Consider the following five disk access requests of the form (request id, cylinder number) that are present in the disk scheduler queue at a given time.

(P, 155), (Q, 85), (R, 110), (S, 30), (T, 115)

Assume the head is positioned at cylinder 100. The scheduler followers Shortest Seek Time First scheduling to service the requests.

Which one of the following statement is FALSE?

(A) T is sericed before P.
(B) Q is serviced after S, but before T.
(C) The head reverses its direction of movement between servicing of Q and P.
(D) R is serviced before P.

Q4. The preorder traversal of a binary search tree is 15, 10, 12, 11, 20, 18, 16, 19.

Which one of the following is the postorder traversal of the tree?

(A) 10, 11, 12, 15, 16, 18, 19, 20
(B) 11, 12, 10, 16, 19, 18, 20, 15
(C) 20, 19, 18, 16, 15, 12, 11, 10
(D) 19, 16, 18, 20, 11, 12, 10, 15

Q5. Raman is confident of speaking English _________ six months as he has been practising regularly _________ the last three weeks.

(A) during, for
(B) for, since
(C) for, in
(D) within, for