1. What is the primary goal of target code representation in a compiler?
A) To generate machine-independent code
B) To convert intermediate code into a form that can be directly executed by the target machine
C) To optimize the program for specific hardware
D) To perform error detection in the source code
Answer: B) To convert intermediate code into a form that can be directly executed by the target machine
2. Which of the following is an example of a target code representation?
A) Three-Address Code (TAC)
B) Assembly language code
C) Abstract Syntax Tree (AST)
D) Intermediate Representation (IR)
Answer: B) Assembly language code
3. What type of code does target code representation typically correspond to?
A) High-level language code
B) Intermediate code
C) Machine-level code or assembly language
D) Source code
Answer: C) Machine-level code or assembly language
4. In the context of target code representation, which of the following is true about Assembly language?
A) It is a high-level programming language
B) It provides a low-level representation of machine code
C) It is platform-independent
D) It is not used in modern compilers
Answer: B) It provides a low-level representation of machine code
5. Which of the following is a feature of target code representation in a compiler?
A) It is always platform-independent
B) It is a human-readable version of the machine code
C) It is typically translated into machine code or executed by a virtual machine
D) It is only used for error detection during compilation
Answer: C) It is typically translated into machine code or executed by a virtual machine
6. What is a key consideration in the design of target code representation for different target machines?
A) The availability of hardware resources such as registers and memory
B) The compatibility of the target code with multiple operating systems
C) The verbosity of the high-level programming language
D) The complexity of intermediate code generation
Answer: A) The availability of hardware resources such as registers and memory
7. Which of the following is a common target code representation used in modern compilers?
A) High-level programming languages
B) Abstract Syntax Trees
C) Assembly code or machine code
D) Regular expressions
Answer: C) Assembly code or machine code
8. In the process of compiling, which phase converts intermediate code into target code?
A) Lexical analysis
B) Parsing
C) Code generation
D) Semantic analysis
Answer: C) Code generation
9. Why is target code representation important for compiler optimization?
A) It enables the compiler to better understand the original program’s logic
B) It allows the compiler to optimize the program based on the target machine’s architecture and features
C) It helps detect syntax errors early
D) It provides a direct mapping between high-level constructs and low-level machine instructions
Answer: B) It allows the compiler to optimize the program based on the target machine’s architecture and features
10. What is the role of “register allocation” in target code generation?
A) To determine how many registers are available for variable storage in target code
B) To allocate memory for arrays in the target code
C) To optimize loop unrolling in the target code
D) To assign target-specific machine instructions
Answer: A) To determine how many registers are available for variable storage in target code
11. Which type of target code is typically closer to the final executable output?
A) High-level language code
B) Assembly language code
C) Intermediate representation (IR)
D) Source code
Answer: B) Assembly language code
12. What is a common advantage of using intermediate representations (IR) before target code generation?
A) IR can be used for error checking during the compilation process
B) IR simplifies the debugging process
C) IR is platform-dependent, which allows for more specific optimizations
D) IR allows for easier portability of the compiler across different architectures
Answer: D) IR allows for easier portability of the compiler across different architectures
13. Which of the following is an example of a machine-independent intermediate representation (IR) that can be used for target code generation?
A) Assembly language
B) Three-address code (TAC)
C) Binary machine code
D) Object code
Answer: B) Three-address code (TAC)
14. In the context of target code representation, what does the term “object code” refer to?
A) High-level code
B) The final executable program produced by the compiler
C) Code in a form that is ready to be linked but not yet executable
D) The intermediate code that is generated by the compiler
Answer: C) Code in a form that is ready to be linked but not yet executable
15. What is a typical outcome of the target code generation phase of a compiler?
A) Syntax errors are detected
B) High-level source code is directly translated into machine code
C) The final machine-readable object code is produced
D) Intermediate representations are optimized for better performance
Answer: C) The final machine-readable object code is produced