Lexical Analyzer Tasks and Implementations

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What is the main role of the lexical analyzer?

Collect type information for code generation

Recognize meaningful structures in the source program

Check for semantic errors in the source program

Recognize the smallest meaningful units (tokens) in the source program (correct)

In which parsing technique does the construction of the parse tree start at the root and proceed towards the leaves?

LR Parsing

Non-Recursive Predictive Parsing (LL Parsing)

Recursive Predictive Parsing (correct)

Operator-Precedence Parsing

What is an example of bottom-up parsing?

LR Parsing (correct)

Recursive Predictive Parsing

Simple Left-to-Right Parsing

Operator-Precedence Parsing

Which type of parsing is also known as shift-reduce parsing?

Bottom-Up Parsing Signup and view all the answers

What is an important part of semantic analysis that a semantic analyzer performs?

Type-checking for code generation Signup and view all the answers

What distinguishes LR Parsing from Operator-Precedence Parsing?

Being a much general form of shift-reduce parsing Signup and view all the answers

What is the main role of a lexical analyzer?

Recognizing simple nonrecursive constructs of the language Signup and view all the answers

What term is used synonymously with 'Syntax Analyzer'?

Parser Signup and view all the answers

What is the key difference between the tasks of a lexical analyzer and a syntax analyzer?

Lexical analyzer simplifies the job of syntax analyzer, which deals with recursive constructs Signup and view all the answers

Which part of a program is mainly recognized by a lexical analyzer?

Nonrecursive constructs Signup and view all the answers

What does a parse tree in a syntax analysis represent?

Syntactic structure of the given program Signup and view all the answers

In the context of programming language processing, what does BNF stand for?

Backus Naur Form Signup and view all the answers

What is one of the tasks performed by a Lexical Analyzer?

Reading source text and detecting tokens Signup and view all the answers

Which programming language implementation approach for Lexical Analyzers is considered the most efficient but also most difficult to implement?

Assembly language Signup and view all the answers

What is a benefit of separating Lexical Analysis from Parsing in terms of compiler efficiency?

Improved portability Signup and view all the answers

Which tool is mentioned as easy to implement but not as efficient as using assembly language or high-level languages like C for Lexical Analysis?

lex Signup and view all the answers

What do specialized buffering techniques in Lexical Analyzers primarily focus on?

Reading input characters and processing tokens efficiently Signup and view all the answers

Which phase of a compiler involves creating a Symbol Table and updating its entries?

Lexical Analysis Signup and view all the answers