Certified Ethical Hacker 312-50v11 Practice Test

Automatic bounds checking is the feature that prevents buffer overflow by ensuring array accesses stay within valid indices. Each time you index an array, the language verifies that the index is between 0 and the array length minus one; if it isn’t, it raises an error or exception instead of writing past the end of the buffer. This runtime guard stops many overflow scenarios that would otherwise corrupt adjacent memory.

Manual memory management and pointer arithmetic don’t provide automatic protection; they let you compute addresses and write data without built-in checks, increasing the risk of overruns. Preprocessor macros aren’t runtime safeguards either—they’re text substitutions that happen before compilation and won’t prevent out-of-bounds writes during execution. In languages that enforce bounds automatically, the safety comes from the language’s runtime or type system enforcing those checks, reducing the chance of a buffer overflow from ordinary array usage.