Final answer:
Constructors for static objects at block scope are called at the beginning of the block, while destructors are called at the end of the block, ensuring proper resource management throughout the program's execution.
Step-by-step explanation:
When dealing with static objects at block scope in programming, particularly in languages like C++, the timing of when constructors/destructors are called is specific. The correct answer to when constructors and destructors are called for static objects at block scope is at the beginning and end of the block they are defined in, respectively.
For a static object defined within a block, the constructor is called once when the block is entered for the first time, which means when the program execution reaches the point where the static object is defined. This is because static objects have a lifetime that extends across the entire execution of the program; however, their scope is limited to the block where they are declared. The destructor, on the other hand, is called once when the program exits that scope, be it due to the block ending or because the program is finishing execution. It is important to note that this sequence ensures proper resource allocation and cleanup for such objects.