Recall & Review
beginner
What is a panic in Go?
A panic is a built-in function that stops the normal execution of a program. It is used when something unexpected happens, like an error that can't be handled normally.
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beginner
How does Go handle a panic by default?
By default, when a panic occurs, Go stops the current function and starts unwinding the stack, running deferred functions along the way, and then the program crashes with a message.
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intermediate
What is the role of the recover function in panic behavior?
The recover function can catch a panic inside a deferred function, stopping the program from crashing and allowing the program to continue running.
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intermediate
When should you use panic in Go?
Use panic only for serious errors that should stop the program immediately, like bugs or unexpected states. For normal errors, use error values instead.
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beginner
What happens to deferred functions when a panic occurs?
Deferred functions still run when a panic happens. This lets you clean up resources or recover from the panic before the program stops.
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What does the panic function do in Go?
✗ Incorrect
panic stops normal execution and begins unwinding the stack.
Which function can catch a panic to prevent the program from crashing?
✗ Incorrect
recover can catch a panic inside a deferred function.
What happens to deferred functions when a panic occurs?
✗ Incorrect
Deferred functions run even during panic stack unwinding.
When is it appropriate to use panic in Go?
✗ Incorrect
panic is for serious errors that should stop the program.
What does stack unwinding mean in the context of panic?
✗ Incorrect
Stack unwinding means running deferred functions while exiting each function.
Explain how panic and recover work together in Go to handle unexpected errors.
Think about how you can stop a crash and keep the program running.
You got /4 concepts.
Describe when it is best to use panic instead of returning an error in Go.
Consider the difference between a crash and a normal mistake.
You got /4 concepts.