GATE CSE 2026 Paper 1 — page 15

Questions 43–45 of 65. Imported answers require review unless explicitly marked reviewed.

Consider a relational database schema with two relations

and

. Let

be a tuple relational calculus expression. Which one of the following relational algebraic expressions is equivalent to

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A TCP sender successfully establishes a connection with a TCP receiver and starts the transmission of segments. The TCP congestion control mechanism’s slow-start threshold is set to 1000 segments. Assume that the round-trip time is fixed at 1 milisecond. Assume that the sender always has data to send, the segments are numbered from 1, and no segment is lost. Let

denote the time (in miliseconds) at which the transmission of segment number 2000 starts. Which one of the following options is correct?

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Consider the implementation of sliding window protocol over a lossless link, with a window size of

frames, where each frame is of size 1000 bits (including header). The bandwidth of the link is 100 kbps (

) and the one-way propagation delay is 100 miliseconds. Assume that processing times at the sender and receiver are zero and the transmission time of acknowledgments is also zero. Which one of the following options gives the minimum size of

(in number of frames) required to achieve 100% link utilization?

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2026 · Paper 1

Question 43

Question 44

Question 45