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Welcome to the Bottom Up Parsing MCQs Page

Dive deep into the fascinating world of Bottom Up Parsing with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Bottom Up Parsing, a crucial aspect of Compiler Design. In this section, you will encounter a diverse range of MCQs that cover various aspects of Bottom Up Parsing, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Compiler Design.

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Check out the MCQs below to embark on an enriching journey through Bottom Up Parsing. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Compiler Design.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Bottom Up Parsing. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Bottom Up Parsing MCQs | Page 3 of 5

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Q21.
_________ or scanning is the process where the stream of characters making up the source program is read from left to right and grouped into tokens.

a.

Lexical Analysis

b.

Diversion

c.

Modelling

d.

None of the mentioned

Discuss
Answer: (a).Lexical Analysis
Q22.
_____________ is a graph representation of a derivation

a.

The parse tree

b.

Oct tree

c.

Binary tree

d.

None of the mentioned

Discuss
Answer: (a).The parse tree
Q23.
Which of the following symbols table implementation is based on the property of locality of reference?

a.

Hash Table

b.

Search tree

c.

Self organizing list

d.

Linear list

Discuss
Answer: (c).Self organizing list
Q24.
Assume that the SLR parser for a grammar G has n1 states and the LALR parser for G has n2 states. Hence which one is true?

a.

N1 is necessarily less than n2

b.

N1 is necessarily equal to n2

c.

N1 is necessarily greater than n2

d.

None of the mentioned

Discuss
Answer: (b).N1 is necessarily equal to n2
Q25.
Which of these is also known as look-head LR parser?

a.

SLR

b.

LR

c.

LLR

d.

None of the mentioned

Discuss
Answer: (c).LLR
Q26.
What is the similarity between LR, LALR and SLR?

a.

Use same algorithm, but different parsing table.

b.

Same parsing table, but different algorithm.

c.

Their Parsing tables and algorithm are similar but uses top down approach.

d.

Both Parsing tables and algorithm are different.

Discuss
Answer: (a).Use same algorithm, but different parsing table.
Q27.
An LR-parser can detect a syntactic error as soon as

a.

The parsing starts

b.

It is possible to do so a left-to-right scan of the input.

c.

It is possible to do so a right-to-left scan of the input.

d.

Parsing ends

Discuss
Answer: (b).It is possible to do so a left-to-right scan of the input.
Q28.
Which of these is true about LR parsing?

a.

Is most general non-backtracking shift-reduce parsing

b.

It is still efficient

c.

Both a and b

d.

None of the mentioned

Discuss
Answer: (c).Both a and b
Q29.
Which of the following is incorrect for the actions of A LR-Parser ?
I) shift s
ii) reduce A->ß
iii) Accept
iv) reject?

a.

Only I)

b.

I) and ii)

c.

I), ii) and iii)

d.

I), ii) , iii) and iv)

Discuss
Answer: (c).I), ii) and iii)
Q30.
If a state does not know whether it will make a shift operation or reduction for a terminal is called

a.

Shift/reduce conflict

b.

Reduce /shift conflict

c.

Shift conflict

d.

Reduce conflict

Discuss
Answer: (a).Shift/reduce conflict
Page 3 of 5

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