Compiler Design Question Bank

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Questions and Answers

What is a token commonly associated with in programming languages?

A unit of meaningful data (correct)

A syntax error

A compilation step

A parse tree structure

Which of the following describes a regular expression in relation to tokens?

A pattern that defines a token (correct)

A static keyword

A method for parsing strings

A collection of tokens

What type of structure organizes the relationship between tokens during parsing?

Parse tree (correct)

Data table

Syntax tree

Keyword index

What could be an indication of a parse tree structure during the compilation process?

Syntactic analysis Signup and view all the answers

Which of the following is NOT a role of regular expressions in relation to tokens?

Compiling token data Signup and view all the answers

What does the parser do with tokens?

Creates a parse tree Signup and view all the answers

What is the purpose of the code optimization phase?

Improve program execution speed without wasting resources Signup and view all the answers

Which phase of the compiler generates an annotated syntax tree?

Semantic Analysis Signup and view all the answers

Which phase checks the compatibility of data types in expressions?

Semantic Analysis Signup and view all the answers

What is a regular language in the context of lexical analysis?

A language that can be defined by regular expressions Signup and view all the answers

What is the first phase of a compiler?

Lexical Analysis Signup and view all the answers

What does the syntax analyzer check during the syntax analysis phase?

If the tokens are arranged correctly according to grammar Signup and view all the answers

What is a symbol table used for in a compiler?

Storing program identifiers and their attributes Signup and view all the answers

What does the code optimization phase aim to do?

Eliminate unnecessary lines of code Signup and view all the answers

What is checked during semantic analysis?

Whether the parse tree follows the rules of the language Signup and view all the answers

What does lexical analysis do in a compiler?

Scans the source code for tokens Signup and view all the answers

Which phase translates the intermediate code into machine code?

Code Generation Signup and view all the answers

What is a lexeme in lexical analysis?

A specific token instance Signup and view all the answers

In which phase are comments and white-space eliminated?

Lexical Analysis Signup and view all the answers

What does a lexical analyzer do if it finds an invalid token?

Generates an error Signup and view all the answers

What is a keyword in programming?

A reserved word with a special meaning Signup and view all the answers

What type of token is used to perform operations in a program?

Operators Signup and view all the answers

What is the purpose of a regular expression in lexical analysis?

To describe valid patterns for tokens Signup and view all the answers

What does a semantic analyzer check for?

Whether identifiers are declared before use Signup and view all the answers

What does the code generation phase do?

Translates intermediate code into machine code Signup and view all the answers

Which of the following is a task of the lexical analyzer?

Identify tokens and pass them to the parser Signup and view all the answers

Study Notes

Compiler Question Bank

Question 1: The first phase of a compiler is lexical analysis.
Question 2: Lexical analysis scans source code to identify tokens.
Question 3: A lexeme is a specific instance of a token.
Question 4: Syntax analysis creates a parse tree from tokens.
Question 5: Syntax analysis checks if tokens conform to the grammar rules.
Question 6: Semantic analysis produces annotated syntax tree.
Question 7: During semantic analysis, the validity of tokens and their relationships are checked.
Question 8: Intermediate code generation translates source code to an abstract machine language.
Question 9: Code optimization aims to improve the speed and efficiency of the code.
Question 10: The code generation phase converts intermediate code to machine code.
Question 11: A symbol table stores information about identifiers and their attributes.
Question 12: Semantic analysis manages scopes in a program.
Question 13: Lexical analysis removes comments and whitespace.
Question 14: A lexical analyzer signals an error if an invalid token is found.
Question 15: An example of a token in C is "<int, keyword>".
Question 16: Keywords are reserved words with pre-defined meanings in programming languages.
Question 17: Identifiers are user-defined names. An example in the provided dataset is value.
Question 18: Operators perform operations in a program.
Question 19: Punctuation tokens separate or structure code elements.
Question 20: A regular expression describes valid token patterns.
Question 21: A regular expression defines a pattern for valid strings or tokens.
Question 22: Semantic analysis determines if the code adheres to the programming language’s grammar rules.
Question 23: Identifiers are names given to variables or functions.
Question 24: The code generation phase converts intermediate code into machine language.
Question 25: Lexical analysis's role is to identify tokens in the source code.
Question 26: The parser uses tokens to build a parsing tree.
Question 27: Code optimization improves program execution speed without unnecessary resource use.
Question 28: The "get next token" command in lexical analysis retrieves the next token from the source code.
Question 29: Syntax analysis closely follows lexical analysis.
Question 30: Intermediate code represents a program for an abstract machine.
Question 31: Regular languages are defined using regular expressions.
Question 32: Semantic analysis verifies data type compatibility within expressions.
Question 33: An annotated syntax tree results from the syntax analysis phase.
Question 34: A regular expression specifies a pattern for tokens.

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Description

This quiz covers essential concepts in compiler design, focusing on the various phases such as lexical analysis, syntax analysis, and semantic analysis. Test your knowledge about token identification, parse tree creation, and code generation processes. Perfect for students studying compiler construction in computer science courses.