UNIT - 4 A Compiler Optimization Quiz

Which of the following is a primary source of optimization in a compiler?

• Memory allocation

• Constant folding

• Error checking

• Function declaration

What is the primary goal of optimization in a compiler?

• To reduce program size

• To improve program readability

• To reduce execution time or memory usage

• To correct syntax errors

What type of optimization is involved in reducing the number of instructions executed in a program?

• Code generation optimization

• Loop optimization

• Peephole optimization

• Instruction selection optimization

Which of the following optimizations is based on the concept of eliminating redundant calculations?

• Constant propagation

• Dead code elimination

• Instruction scheduling

• Inline expansion

What is Data Flow Analysis used for in compiler optimization?

• To optimize memory management

• To analyze the flow of data across different parts of a program

• To check for syntax errors

• To generate machine code

What is the main purpose of a flow graph in the context of compiler optimization?

• To represent the program structure

• To represent the control flow of a program

• To represent the data flow through variables and expressions

• To visualize the output of a program

Which of the following is an example of constant propagation?

• Replacing a variable with its value if the variable is constant at compile time

• Replacing a variable with the result of an arithmetic operation

• Removing unused variables

• Moving functions out of loops

What is the key idea behind loop optimization in a flow graph?

• To reduce the number of iterations in the loop

• To move computations out of loops to reduce the overhead

• To increase the loop's memory usage

• To remove conditional checks inside loops

In the context of data flow analysis, what does reaching definition refer to?

• Determining which definitions of a variable are accessible at a particular point in the program

• Determining the type of variables used

• Analyzing memory usage patterns

• Identifying unused variables

What is an example of an optimization technique that eliminates unnecessary instructions?

• Constant propagation

• Dead code elimination

• Inlining functions

• Strength reduction