adplus-dvertising
frame-decoration

Question

Why do optimizers convert pretested loops to posttested loops?

a.

To make them more efficient

b.

To make them easier to understand

c.

To make them smaller in size

d.

To make them faster to execute

Posted under Reverse Engineering

Answer: (a).To make them more efficient Explanation:Optimizers convert pretested loops to posttested loops to make them more efficient. Pretested loops require an extra unconditional jump at the end of the loop's body, which makes them less efficient than posttested loops.

Engage with the Community - Add Your Comment

Confused About the Answer? Ask for Details Here.

Know the Explanation? Add it Here.

Q. Why do optimizers convert pretested loops to posttested loops?

Similar Questions

Discover Related MCQs

Q. Do code structure optimizations change the behavior of the original program?

Q. What is redundancy elimination in the context of code optimization?

Q. Why is leaving static expressions inside loops considered wasteful?

Q. How can optimizers streamline pointer arithmetic?

Q. What is the back end of a compiler responsible for?

Q. What is the target-specific language usually like?

Q. What is the importance of the code generator in applying platform-specific optimizations?

Q. What stage of the code generation process is responsible for selecting individual instructions?

Q. What is register allocation responsible for?

Q. What is instruction scheduling responsible for?

Q. What is the end result of instruction scheduling?

Q. What is a listing file?

Q. What is the purpose of a listing file?

Q. Which compilers support the generation of listing files during the compilation process?

Q. How can a listing file be used in reverse engineering?

Q. Which compiler generates code for a large number of different processors, including IA-32?

Q. Which compiler was developed primarily for those that need to squeeze the absolute maximum performance possible from Intel’s IA-32 processors?

Q. Which compilers have a powerful optimization engine?

Q. What is an execution environment?

Q. How do execution environments affect the reversing process?