GATE (Graduate Aptitude Test in Engineering) Computer Science & IT (CS): Questions 320 - 322 of 3196

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Question 320

Appeared in Year: 2015

Question MCQ▾

Which of the following statements is false? (December)

Choices

Choice (4)Response

a.

Bottom-up parsers are in the LR family, where L stands for left-to-right scan and R stands for rightmost derivation

b.

Top-down parsers are LL parsers where first L stands for left-to-right scan and second L stands for a leftmost derivation.

c.

The class of context-free languages is closed under reversal. That is, if L is any context-free language, then the language } is context free.

d.

(000) ⚹ is a regular expression that matches only strings containing an odd number of zeroes, including the empty string.

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Question 321

Appeared in Year: 2015

Question MCQ▾

System calls are usually invoked by using: (December)

Choices

Choice (4)Response

a.

A software interrupt

b.

A privileged instruction

c.

Polling

d.

An indirect jump

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Question 322

Appeared in Year: 2015

Question MCQ▾

Which of the following properties a Group G must hold, in order to be an Abelian group?

(1) The distributive property

(2) The commutative property

(3) The symmetric property (December)

Choices

Choice (4)Response

a.

(2) only

b.

(2) and (3)

c.

(1) and (2)

d.

(1) only

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