Python Variable Scope and Stack Frames

What is a global variable in Python?

• A variable that is only accessible within the function it is defined in.

• A variable that is accessible throughout the entire program.

• A variable that is only accessible within the module it is defined in.

• A variable that is defined within a class.

Which of the following best describes a local variable in Python?

• A variable that is accessible from any part of the program.

• A variable that is defined outside of any function.

• A variable that is only accessible within the function or block it is defined in.

• A variable that is defined within a class.

What is the purpose of the `global` keyword in Python?

• To define a variable that is only accessible within a function.

• To declare a variable as global within a function, allowing it to be modified.

• To create a new local variable within a function.

• To import global variables from another module.

What is a stack frame in the context of Python programming?

• A data structure that stores global variables.

• A block of memory that stores information about a function call.

• A method for resolving variable names.

• A type of loop structure.

Which of the following is true about the function call stack in Python?

• It is used to store global variables.

• It keeps track of the order in which functions are called and returns.

• It is used to manage file input and output operations.

• It is a type of data structure used for sorting.

What happens to local variables when a function call is completed?

• They are stored in the global scope.

• They are deleted and their memory is freed.

• They are converted to global variables.

• They are saved for future function calls.

How can you access a global variable inside a function if a local variable with the same name exists?

• By using the `local` keyword.

• By using the `global` keyword.

• By using the `nonlocal` keyword.

• By using the `global` keyword followed by the variable name.

What is the lifetime of a global variable in Python?

• It lasts only during the execution of a function.

• It lasts until the program terminates.

• It lasts until the function in which it is defined terminates.

• It lasts until the module in which it is defined is unloaded.

Which of the following statements about variable scope is correct?

• Local variables can be accessed from outside the function they are defined in.

• Global variables can be accessed from any function within the same module.

• Local variables have a longer lifetime than global variables.

• Global variables are automatically deleted when a function call is completed.