Quiz for Stack unwinding

Q1: What does stack unwinding refer to in C++ exception handling?

A. The process of cleaning up the stack when an exception is thrown B. The process of throwing exceptions C. The process of catching exceptions D. The process of function overloading

Q2: When does stack unwinding occur?

A. When an exception is thrown B. When a function is called C. When a variable is declared D. When a program starts

Q3: During stack unwinding, what happens to local objects?

A. They are destructed B. They are copied C. They are ignored D. They are duplicated

Q4: What happens if a destructor called during stack unwinding throws another exception?

A. Program calls std::terminate() B. Exception is ignored C. Exception is caught automatically D. Stack unwinding continues normally

Q5: Stack unwinding helps in?

A. Resource cleanup B. Code optimization C. Faster execution D. Memory allocation

Q6: Which C++ mechanism automatically triggers stack unwinding?

A. Throwing an exception B. Function call C. Variable declaration D. Class inheritance

Q7: What is the role of destructors in stack unwinding?

A. To release resources and perform cleanup B. To allocate new memory C. To prevent exceptions D. To catch exceptions

Q8: If stack unwinding reaches main without finding a handler, what happens?

A. Program terminates B. Exception is ignored C. Exception is caught by default handler D. Stack unwinding stops

Q9: Which of the following is NOT cleaned up during stack unwinding?

A. Static variables B. Local automatic variables C. Objects on the stack D. Temporary objects

Q10: Stack unwinding proceeds until which point?

A. Until a matching catch block is found B. Until the end of the program C. Until main function starts D. Until an exception is thrown

Q11: Which function in C++ can be used to manually initiate stack unwinding?

A. throw B. catch C. timeout D. finally

Q12: Does stack unwinding call destructors for dynamically allocated objects?

A. No, only automatic objects B. Yes, all objects C. Only static objects D. No objects

Q13: What is the primary purpose of stack unwinding?

A. To prevent resource leaks B. To speed up program execution C. To allocate memory D. To catch exceptions

Q14: Can stack unwinding be stopped once started?

A. No B. Yes C. Only by catch block D. Only by destructor

Q15: Which of the following best describes stack unwinding?

A. A process to destroy local objects while searching for an exception handler B. A process to create new objects C. A process to allocate stack memory D. A process to call constructors

Q16: In which order are destructors called during stack unwinding?

A. Reverse order of object construction B. Order of object construction C. Random order D. Alphabetical order

Q17: What happens if stack unwinding is not properly handled?

A. Resource leaks and undefined behavior B. Faster program execution C. Automatic exception handling D. Memory optimization

Q18: Stack unwinding affects which part of program state?

A. Call stack and local variables B. Global variables only C. Heap memory only D. Static variables only

Q19: How can you ensure safe stack unwinding?

A. Avoid throwing exceptions from destructors B. Throw exceptions from destructors C. Ignore exceptions D. Catch all exceptions