Lexical Analysis Questions

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11.

Two Important lexical categories are __________

A

White Space

B

Comments

C

None of the mentioned

D

White Space & Comments

Correct Answer: D

Two important common lexical categories are white space and comments.

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12.

It has encoded within it information on the possible sequences of characters that can be contained within any of the tokens it handles. The mentioned function is performed by?

A

Scanner

B

Parser

C

Syntactic Analyser

D

All of the mentioned

Correct Answer: A

The first stage, the scanner, is FSM. It has encoded information on the possible sequences of characters that can be contained within any of the tokens it handles.

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13.

What goes over the characters of the lexeme to produce value?

A

Scanner

B

Parser

C

Evaluator

D

Lexical generator

Correct Answer: A

In order to construct a token, the lexical analyzer needs a second stage, the evaluator, which goes over the characters of the lexeme to produce a value.

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14.

What constitutes the stages of the compilation process?

A

Feasibility study, system, design, and testing

B

Implementation and documentation

C

Lexical analysis, syntax, Analysis and code generation

D

None of the mentioned

Correct Answer: C

As defined in the compilation process.

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15.

The lexical analyzer takes _________ as input and produces a stream of _______ as output.

A

Source program, tokens

B

Token, source program

C

Either of the two

D

None of the mentioned

Correct Answer: A

As per the definition of Lexical Analyser which states that lexical analysis is the process of converting a sequence of characters into tokens.

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16.

Parsing is also known as ________

A

Lexical Analysis

B

Syntax Analysis

C

Semantic Analysis

D

Code Generation

Correct Answer: B

Parsing or syntactic analysis is the process of analysing a string of symbols and conforming to the rules of grammar.

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17.

A compiler program written in a high level language is called ________
 

A

Source Program

B

Object Program

C

Machine Language Program

D

None of the mentioned

Correct Answer: A

The input that we give in high level language is also known as the source language.

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18.

System program such a compiler are designed so that they are ________

A

Re-enterable

B

Non-Usable

C

Serially usable

D

None of the mentioned

Correct Answer: A

For the convince of the user compilers are made re-enterable.

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19.

Which of the following is not a feature of compiler?

A

Scan the entire program first and translate into machine code

B

To remove syntax errors

C

Slow for debugging

D

Execution time is more

Correct Answer: D

The objective of the compiler is clearly not to increase the execution time of the program.

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20.

A system program that brings together separately compiled modules of a program into a form language that is suitable for execution.

A

Assembler

B

Linking loader

C

Cross compiler

D

None of the mentioned

Correct Answer: B

A loader which brings together the functions of a relocating loader with the ability to combine a number of program segments that have been independently compiled into an executable program.

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