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. |
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 |
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 |