What is the name for the use of regular expressions by a lexical analyzer to define and recognize valid tokens?
Difficulty: Medium
About this MCQ
This Medium Compiler Design MCQ checks one syllabus fact.
The question is: “What is the name for the use of regular expressions by a lexical analyzer to define and recognize valid tokens?”
The accepted answer is C. Lexical pattern matching. Lexical pattern matching is the fact required by What is the name for the use of regular expressions by a lexical analyzer to define and recognize valid tokens option C Option A Bottom-up parsing does not match the stem it is a near-miss used to catch incomplete recall of Lexical pattern matching Option B Type checking does not match the stem it is a near-miss used to catch incomplete recall of Lexical pattern matching Remaining alternatives Assembler fall outside the same rule and should be eliminated once Lexical pattern matching is identified Compiler Design questions of this type reward precise definitions rather than approximate associations Compiler Design recall of this distinction is a regular item in FPSC PPSC NTS and.
- A. Bottom-up parsing
Why not A: “Bottom-up parsing” is not correct. The accepted answer is C. Lexical pattern matching. Lexical pattern matching is the fact required by What is the name for the use of regular expressions by a lexical analyzer to define and recognize valid tokens option C Option A Bo
- B. Type checking
Why not B: “Type checking” is not correct. The accepted answer is C. Lexical pattern matching. Lexical pattern matching is the fact required by What is the name for the use of regular expressions by a lexical analyzer to define and recognize valid tokens option C Option A Bo
- C. Lexical pattern matching ✓
- D. Assembler
Why not D: “Assembler” is not correct. The accepted answer is C. Lexical pattern matching. Lexical pattern matching is the fact required by What is the name for the use of regular expressions by a lexical analyzer to define and recognize valid tokens option C Option A Bo
Correct answer
C. Lexical pattern matching
Explanation
Lexical pattern matching is the fact required by What is the name for the use of regular expressions by a lexical analyzer to define and recognize valid tokens option C Option A Bottom-up parsing does not match the stem it is a near-miss used to catch incomplete recall of Lexical pattern matching Option B Type checking does not match the stem it is a near-miss used to catch incomplete recall of Lexical pattern matching Remaining alternatives Assembler fall outside the same rule and should be eliminated once Lexical pattern matching is identified Compiler Design questions of this type reward precise definitions rather than approximate associations Compiler Design recall of this distinction is a regular item in FPSC PPSC NTS and.
Source: Compiler Design Official Reference Guide
Tags: computer science, compiler design, compilers, programming languages
Submitted by: MCQsHub Editorial
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