Compiler Design Basics Questions

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1.

Users write the programs in which language?

A

Low-level Language

B

High-Level Language

C

Decimal-Format

D

Middle-Level Language

Correct Answer: B

Users write the program in a high-level language because it is easier to use, understand and remember.

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2.

Which computer program accepts the high-level language and converts it into assembly language?

A

Interpreter

B

Linker

C

Assembler

D

Compiler

Correct Answer: D

Compiler is a computer program that accepts the code written in a high-level language and converts that code into the assembly language.

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3.

Does the compiler program translate the whole source code in one step?

A

No

B

Depends on the Compiler

C

Don't Know

D

Yes

Correct Answer: D

The compiler is that program which translates the whole high-level code into the machine code at once.

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4.

Which of the following file is an output of the assembler?

A

Program file

B

Object file

C

Data File

D

Task File

Correct Answer: B

The object file contains the object code, which is an output of an assembler.

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5.

Which tool is used for grouping of characters in tokens in the compiler?

A

Parser

B

Code optimizer

C

Code generator

D

Scanner

Correct Answer: D

Scanner is a subroutine which is called by the compiler program. The scanner combines the characters and implements them to produce tokens.

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6.

What is the linker?

A

It is always used before the program execution.

B

It is required to create the load module.

C

It is the same as the loader

D

None of the above

Correct Answer: B

Linker is a program in the compiler which is required to create a load module.

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7.

Parsing is categorized into how many types?

A

three types

B

four types

C

two types

D

five types

Correct Answer: C

In the compiler design, the parser is mainly categorized into top-down parsing and bottom-up parsing.

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8.

In which parsing, the parser constructs the parse tree from the start symbol and transforms it into the input symbol.

A

Bottom-up parsing

B

Top-down parsing

C

None of the above

D

Both a and b

Correct Answer: B

Top-down parsing is a technique which constructs the parse tree from the start symbol and transforms it to the input symbol. This type of parsing is also referred to as predictive or recursive parsing.

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9.

Which derivation is generated by the top-down parser?

A

Right-most derivation in reverse

B

Left-most derivation in reverse

C

Right-most derivation

D

Left-most derivation

Correct Answer: D

Top-down parser generates the left-most derivation. It constructs the parse tree from left to right and constructs the left-most derivation of the specified sentence.

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10.

Which derivation is generated by the bottom-up parser?

A

Right-most derivation in reverse

B

Left-most derivation in reverse

C

Right-most derivation

D

Left-most derivation

Correct Answer: A

Bottom-up parser generates the right-most derivation in reverse. It constructs the parse tree from the input string to the root and tries to construct the right-most derivation of the specified string backward.

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