Compiler Design Interview Questions & Answers

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Compiler design technologies play a vital role in computer science, their development allows programs that run software onto hardware.

Compiler design development technology is central to software engineering and computer programming and must adapt to new language features.

1. What is the first tool used in the compilation process?

The initial tool in the compilation process is a scanner generated scanner, which accepts regular expression as input and produces tokens in return.

2. What is the output of a parser generator?

An output from a parser generator is typically a syntax analyser or parse tree that tests token syntax and correctness during the compilation process.

3. What is the role of a syntax-directed translation engine?

A syntax-directed translation engine contains routines that traverse parse trees to produce intermediate code during semantic analysis phases or medium code representation bases.

4. What is data flow analysis used for?

Data flow analysis can be employed during the code optimisation stage to reduce unnecessary statements and produce better code.

5. What is the final output of the code generation tool?

The output of this code generation tool is machine code, this machine code is generated by accepting optimised intermediate code as input and using a go generator for generation.

6. What is the compiler construction tool?

A compiler construction tool (CCT) consists of routines used to assemble the compiler itself; these may include various pieces or even an integrated parser and syntax-directed translation engine.

7. What is the data structure called that token information in a compiler?

A symbol table is the data structure containing token information within a compiler.

8. What does the lexical analyser do?

A lexical analyser processes programs character by character to convert them into lexemes for reading by the token.

9. What are tokens?

Tokens are stored in a symbol table, which maintains information such as their variable name, value and scope.

10. What is the symbol table used for?

This table stores token information, such as their variable name, value and scope, and permits the use of subroutines within a compiler.

11. What is the next phase of the compiler after the lexical analyser?

After the lexical analyser comes the intermediate code generator, with an intermediate representation of all your boots.

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12. What is the purpose of the symbol table in the code generator?

A symbol table stores information regarding the token, variable name, value and scope.

13. How many stages are there in the compiler?

A compiler includes six stages: lexical analyser, parser, semantic analyser, intermediate code generator, code optimiser and code generator.

14. What is the purpose of a syntax analyser?

A syntax analyser checks whether or not the source program meets past polling syntax requirements before compiling.

15. What is the responsibility of the error handler in syntax emulation?

An error handler in syntax emulation could take many forms: syntax analyser, lexical analyser, semantic analyser, or intermediate code generator error code optimiser.

16. What is the intermediate code generator used for?

It has an intermediate representation code, which can then be converted to machine code.

17. What is the assembly-level language used for?

Assembly-level language allows operations on three addresses to occur more quickly.

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18. What is the meaning of the load instruction?

The load instruction loads content from memory into a record such as R one, R two or an accumulator.

19. What happens when we choose three address codes while performing yard operations?

Once we choose three address codes while performing yard operations, the result of those will be stored in an allocated register.

20. What does the syntax analyser do?

The syntax analyser generates a parse tree to test token compliance with language syntax rules.

21. What happens if the corresponding tickets do not follow the language syntax rules?

An error handler will be activated and reported back to the user.

22. What is the purpose of the semantic animation?

Semantic animation tests whether the meaning of a parse tree is accurate using type-checker software or tools.

23. What is the syntax analyser used for?

A syntax analyser creates a parse tree to check token compliance with language syntax rules; any detected errors will be handled through its error handler and reported to the user for review.

24. How do we design the three-address code?

To design the three address code successfully, there must be three elements present, first is having one operator on the right-hand side; second is only having one operator; and finally, leaving out any operators from the right side altogether.

25. What is the output of the intermediate code generator?

An intermediate code representation can be seen as part of the medium code generator’s output.

26. What is the third task of the lexical analyser?

The third goal of lexical analysers is to remove whitespace characters such as blank spaces, commas, tab spaces and newline characters from source programs.

27. What is the role of a lexical analyzer crucial in software development?

A lexical analyser plays an integral part in software development by helping generate tokens, remove comments and count line numbers.

28. What are the errors that lexical analysers can report?

Lexical analysers play a vital role in compilation processes by providing error messages with line and column numbers that users can review directly via error handlers.

29. What is the primary function of a lexical analyser?

Syntax analysers interact with simple data to gather identifier information and ascertain their syntax correctness, when presented with source programs as input, syntax analysers create tokens using the index emulation phase before forwarding these to the toolkit and sending requests.

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Srujana

Srujana

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