GATE (Graduate Aptitude Test in Engineering) Computer Science: Questions 1271 - 1273 of 2080

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Question 1271

Appeared in Year: 2017 (UGC-NET)

Question

MCQ▾

Given two relations R1 (A, B) and R2 (C, D) , the result of following query Select distinct A, B from R1, R2 is guaranteed to be same as R1 provided one of the following condition is satisfied. (November paper III)

Choices

Choice (4)Response

a.

R1 and R2 have no duplicates.

b.

R1 has no duplicates and R2 is empty.

c.

R1 has no duplicates and R2 is non - empty.

d.

R2 has no duplicates and R1 is non - empty.

Question 1272

Appeared in Year: 2017 (UGC-NET)

Question

MCQ▾

Which of the following statements are true?

(1) The fragmentation fields in the base header section of IPv4 have moved to the fragmentation extension header in IPv6.

(2) The authentication extension header is new in IPv6.

(3) The record route option is not implemented in IPv6. (November paper III)

Choices

Choice (4)Response

a.

(1) and (2) Only

b.

(2) and (3) Only

c.

(1) and (3) Only

d.

(1) , (2) and (3)

Question 1273

Question

MCQ▾

Consider the following statements.

I. Mutex is Signaling mechanism

II. Semaphore is Locking mechanism

Which is correct? (Model paper II)

Choices

Choice (4)Response

a.

Only I

b.

Only II

c.

None of the above

d.

Question does not provide sufficient data or is vague

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