Q. What does the term 'symbol table' refer to in a compiler?
A.
A table of syntax rules
B.
A data structure that stores information about identifiers
C.
A list of optimization techniques
D.
A representation of the abstract syntax tree
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Solution
A symbol table is a data structure that stores information about identifiers, such as their types and scopes.
Correct Answer:
B
— A data structure that stores information about identifiers
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Q. What is intermediate code in the context of compilers?
A.
The final machine code
B.
A high-level representation of the source code
C.
An abstract representation of the program
D.
The source code itself
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Solution
Intermediate code is an abstract representation of the program that is independent of the target machine, allowing for easier optimization and code generation.
Correct Answer:
C
— An abstract representation of the program
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Q. What is the main function of the runtime environment in a programming language?
A.
To compile the source code
B.
To manage memory and resources during execution
C.
To perform lexical analysis
D.
To generate intermediate code
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Solution
The runtime environment manages memory, handles input/output, and provides other services needed during the execution of a program.
Correct Answer:
B
— To manage memory and resources during execution
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Q. What is the primary function of a lexical analyzer in a compiler?
A.
To generate intermediate code
B.
To parse the source code
C.
To tokenize the input source code
D.
To optimize the code
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Solution
The lexical analyzer's primary function is to tokenize the input source code, breaking it down into meaningful symbols.
Correct Answer:
C
— To tokenize the input source code
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Q. What is the primary purpose of lexical analysis in a compiler?
A.
To generate intermediate code
B.
To convert source code into tokens
C.
To optimize the code
D.
To perform syntax checking
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Solution
Lexical analysis converts the source code into tokens, which are the basic building blocks for further processing in the compiler.
Correct Answer:
B
— To convert source code into tokens
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Q. What is the purpose of code generation in a compiler?
A.
To analyze the syntax of the source code
B.
To produce machine code from intermediate code
C.
To optimize the source code
D.
To perform lexical analysis
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Solution
Code generation is the phase where the compiler translates intermediate code into machine code that can be executed by the target machine.
Correct Answer:
B
— To produce machine code from intermediate code
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Q. What is the purpose of type checking in a compiler?
A.
To ensure that the program runs faster
B.
To verify that operations are performed on compatible data types
C.
To optimize the code
D.
To generate intermediate code
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Solution
Type checking verifies that operations are performed on compatible data types, ensuring program correctness.
Correct Answer:
B
— To verify that operations are performed on compatible data types
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Q. What is the role of a symbol table in a compiler?
A.
To store the intermediate code
B.
To keep track of variable names and their attributes
C.
To optimize the code
D.
To perform lexical analysis
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Solution
The symbol table is used to store information about variable names, types, scopes, and other attributes during the compilation process.
Correct Answer:
B
— To keep track of variable names and their attributes
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Q. Which of the following is a characteristic of a runtime environment?
A.
It is only used during compilation
B.
It manages memory allocation and deallocation
C.
It translates high-level code to machine code
D.
It performs syntax analysis
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Solution
A runtime environment manages memory allocation and deallocation during the execution of a program.
Correct Answer:
B
— It manages memory allocation and deallocation
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Q. Which of the following is a common data structure used to represent the syntax tree in compilers?
A.
Array
B.
Linked list
C.
Binary tree
D.
Hash table
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Solution
A binary tree is commonly used to represent the syntax tree, where each node represents a construct in the source code.
Correct Answer:
C
— Binary tree
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Q. Which of the following is NOT a phase of syntax analysis?
A.
Parsing
B.
Lexical analysis
C.
Semantic analysis
D.
Intermediate code generation
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Solution
Intermediate code generation is not a phase of syntax analysis; it occurs after syntax analysis.
Correct Answer:
D
— Intermediate code generation
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Q. Which of the following is NOT a phase of the compilation process?
A.
Lexical analysis
B.
Syntax analysis
C.
Runtime environment setup
D.
Code generation
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Solution
Runtime environment setup is not a phase of compilation; it is part of the execution of the compiled program.
Correct Answer:
C
— Runtime environment setup
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