BPSC TRE – Compiler Design | Full-Length Test-1

Code motion, strength reduction, and loop unrolling are all standard loop optimizations, so more than one listed technique is correct.

Strength reduction replaces an expensive operation with a cheaper equivalent, constant folding evaluates constants at compile time, and loop fusion can reduce loop overhead and improve locality.

Constant folding evaluates constant expressions, constant propagation substitutes known constants, and loop fusion combines compatible loops; all three are recognized optimizations.

Constant propagation substitutes known constants, constant folding evaluates constant expressions, and code hoisting moves suitable computations to a common earlier point; all are optimization techniques.

Loop unrolling, loop fusion, and loop-invariant code motion are all standard loop transformations or optimizations.