GATE (Graduate Aptitude Test in Engineering) Computer Science: Questions 1780 - 1783 of 2080

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Question 1780

Appeared in Year: 2019 (UGC-NET)

Question

MCQ▾

What is the worst-case running time of Insert and Extract-min, in an implementation of a priority queue using an unsorted array? Assume that all insertions can be accommodated. (December)

Choices

Choice (4)Response

a.

b.

c.

d.

Question 1781

Appeared in Year: 2019 (UGC-NET)

Question

MCQ▾

Which of the following methods are used to pass any number of parameters to the operating system through system calls? (December)

Choices

Choice (4)Response

a.

Stack

b.

Block in main memory and stack

c.

Registers

d.

Block or table in main memory

Question 1782

Appeared in Year: 2019 (UGC-NET)

Question

MCQ▾

Consider the following statements with respect to network security: (December)

(a) Message confidentiality means that the sender and the receiver expect privacy.

(b) Message integrity means that the data must arrive at the receiver exactly as they were sent.

(c) Message authentication means the receiver is ensured that the message is coming from the intended sender.

Choices

Choice (4)Response

a.

Only (a) and (c)

b.

Only (a) and (b)

c.

Only (b) and (c)

d.

All a., b. and c. are correct

Question 1783

Appeared in Year: 2019 (UGC-NET)

Question

MCQ▾

Two concurrent executing transactions and are allowed to update same stock item say in an uncontrolled manner. In such scenario, following problems may occur:

(i) Dirty read problem

(ii) Lost update problem

(iii) Transaction failure

(iv) Inconsistent database state

Which of the following option is correct if database system has no concurrency module and allows concurrent execution of the above two transactions? (December)

Choices

Choice (4)Response

a.

(i) , (ii) and (iii) only

b.

(i) and (ii) only

c.

(iii) and (iv) only

d.

(i) , (ii) and (iv) only

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