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NIELIT-2017 Weekly Toppers Quiz-1

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Question 1

The initial congestion window size over a TCP is 1. If slow strat algorithm is used and the size of congestion window incremented by 1 whenever an ACK is received i.e. after first round trip time congestion window size is 2 segments. Assume connection never leaves slow start. Find the number of RTT’s to send 3999 segments.

Question 2

What is the minimum frame size in (bits) CSMA/CD, if 100 base 5 cable is used? (Assume velocity of data = 2

10⁸ m/s)

Question 3

Bandwidth of a link is 100 Mbps and round trip time is given as 250

sec. If the frame size is 500 bits, calculate the utilization (in percentage) of channel when STOP and WAIT ARQ is used.

Question 4

Consider a 90 Kbps link. What are the respective maximum bandwidth (in Kbps) when pure aloha and slotted aloha is used?

Question 5

Repeater operate similar to which also just create electronic nodes to extend the cable length

Question 6

How many AND gates are present inside a 5-bit carry look ahead generator circuit?

Question 7

A digitial circuit which compares two numbers

is shown in figure. To get output Y=0, choose one pair of correct input numbers.

Question 8

Consider a relational schema R = {A, B, C, D, E, F, G} and the following functional dependencies hold: {A⇒CD, B⇒EF, AB⇒G}. The relation R is in

Question 9

Consider a relational schema R = {A, B, C, D, E, F, G} and the following functional dependencies hold: {AB ⇒ C, BC⇒ D, E⇒A, D⇒E, F⇒G}.
Which of the following are candidate keys of R?

Question 10

Consider the following C code:

What is the value printed by the above program?

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GATE & PSU CS General

Apr 15GATE & PSU CS