Types of Optimizations: Machine-Independent and Machine-Dependent MCQs January 8, 2026December 14, 2024 by u930973931_answers 20 min Score: 0 Attempted: 0/20 Subscribe 1. Which of the following best describes machine-independent optimization? (A) Optimizations that are specific to a certain hardware architecture (B) Optimizations that can be applied to any target machine regardless of its architecture (C) Optimizations that only improve runtime performance (D) Optimizations that are concerned with the operating system 2. Which of the following is an example of a machine-independent optimization? (A) Loop unrolling (B) Strength reduction (C) Instruction scheduling (D) Register allocation 3. Which optimization type is generally concerned with the specific capabilities and features of the target machine’s architecture? (A) Machine-independent optimization (B) High-level optimization (C) Machine-dependent optimization (D) Global optimization 4. Which of the following optimizations is a machine-dependent optimization? (A) Constant folding (B) Dead code elimination (C) Register allocation (D) Loop invariant code motion 5. What is the main goal of machine-independent optimization? (A) To make the program portable across different machine architectures (B) To improve execution time on specific hardware (C) To optimize memory usage on a particular system (D) To improve cache performance on specific CPUs 6. Which of the following optimization techniques applies to all types of machines and targets reducing redundant calculations in loops? (A) Loop invariant code motion (B) Instruction scheduling (C) Branch prediction (D) Register renaming 7. Machine-dependent optimizations are most often applied during which phase of the compilation process? (A) Lexical analysis (B) Syntax analysis (C) Optimization phase (D) Code generation 8. Which of the following optimizations can be classified as machine-independent? (A) Vectorization (B) Branch prediction (C) Cache optimization (D) Inline function expansion 9. What is a key characteristic of machine-independent optimizations? (A) They focus on high-level language improvements and target multiple architectures (B) They optimize code based on the machine’s hardware resources (C) They are dependent on the processor’s instruction set (D) They focus on reducing power consumption on specific devices 10. Which optimization technique focuses on reducing the number of instructions in the target machine code? (A) Dead code elimination (B) Strength reduction (C) Loop unrolling (D) Instruction selection 11. Which of the following optimizations reduces the use of certain types of instructions based on machine architecture? (A) Register allocation (B) Constant folding (C) Strength reduction (D) Instruction scheduling 12. Which of the following is an example of a machine-dependent optimization technique? (A) Code inlining (B) Common subexpression elimination (C) Loop unrolling (D) Memory layout optimization 13. Which of the following optimizations is concerned with minimizing the number of machine-level instructions by combining several instructions into a single instruction? (A) Register allocation (B) Constant propagation (C) Peephole optimization (D) Code motion 14. What is the main purpose of machine-dependent optimizations? (A) To reduce the size of the code (B) To make the code efficient for the specific target machine’s resources (C) To ensure portability across platforms (D) To simplify the syntax of the source code 15. Which of the following is a common machine-independent optimization technique? (A) Loop unrolling (B) Tail-call optimization (C) Pipeline optimization (D) Register reallocation 16. What is the role of machine-independent optimization in the context of multi-platform development? (A) To ensure the code runs faster on a specific platform (B) To use specific hardware instructions to improve performance (C) To improve portability and efficiency across multiple hardware platforms (D) To make the code readable across different platforms 17. Which of the following is NOT an example of machine-dependent optimization? (A) Instruction pipelining (B) Memory caching (C) Register renaming (D) Common subexpression elimination 18. Which optimization technique focuses on transforming the program’s operations to reduce the number of instructions executed? (A) Instruction selection (B) Register allocation (C) Code motion (D) Strength reduction 19. Which optimization is more likely to be dependent on the underlying machine’s specific architecture? (A) Dead code elimination (B) Constant folding (C) Instruction scheduling (D) Inline function expansion 20. Which of the following is the primary focus of machine-independent optimizations in terms of program execution? (A) Minimizing CPU cycles (B) Maximizing power efficiency (C) Improving memory hierarchy utilization (D) Reducing machine-dependent overhead