Final answer:
Inserting a string larger than the allocated array in C results in undefined behavior, often causing a segmentation fault and program crash. C does not automatically handle such situations with string truncation or array resizing, nor does it warn at compile-time.
Step-by-step explanation:
When a string larger than the allocated array is inserted in C, the behavior is undefined. Typically, this can lead to a situation where the program writes past the end of the allocated space, which can cause a segmentation fault, potentially crashing the program. C does not automatically handle such situations by expanding the array or truncating the string; it also does not produce a compiler warning as array bounds are not checked at compile-time.
In practice, inserting a larger string might sometimes appear to work without an immediate crash, as it could overwrite adjacent memory, but this is still an error and can lead to unpredictable behavior or security vulnerabilities. To avoid such problems, it's important to always ensure that strings are properly managed and that sufficient space is allocated to handle the expected size of data.