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Understanding Recursive Functions

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Questions and Answers

What is a base case in recursive functions?

The starting point where the recursive function begins

The condition that stops the recursive calls and prevents infinite looping (correct)

The final output of the recursive function

The number of recursive calls a function can make

How does recursion end in the context of the 'factorial' function?

When 'n' is equal to 1 (correct)

When 'n' reaches the input value

When 'n' becomes 0

When 'n' is greater than 1

Why is it important for recursive functions to have a base case?

To ensure the function starts from the correct point

To guarantee a larger memory allocation for recursive operations

To increase the speed of the recursive calls

To avoid infinite recursion and potential stack overflow (correct)

What happens if a recursive function does not have a base case?

It keeps calling itself indefinitely, leading to a maximum recursion depth exceeded error Signup and view all the answers

What can happen if recursion is not implemented carefully in functions?

It can cause complex debugging and memory consumption issues Signup and view all the answers

What is a global variable?

A variable that is accessible from anywhere in the code Signup and view all the answers

What happens if 'a' is greater than 0 in a function?

The function terminates immediately without executing the subsequent 'print' statement Signup and view all the answers

What error does it raise when trying to access a local variable outside the function?

'NameError' Signup and view all the answers

How can you modify the value of a global variable inside a function?

By using the 'global' keyword in the function Signup and view all the answers

What kind of variable is declared outside of any function?

Global variable Signup and view all the answers

In which scope can a local variable be accessed?

Local scope Signup and view all the answers

What is the purpose of functions in Python?

To perform a specific task, encapsulate code, and promote reusability Signup and view all the answers

Why are functions considered important in programming?

To make programs more modular, readable, and maintainable Signup and view all the answers

What is the purpose of the 'abs()' function in Python?

It returns the absolute value of a number Signup and view all the answers

Which built-in function is used to receive input from the user in the form of a string?

input() Signup and view all the answers

What does the 'eval()' function do in Python?

Evaluates a string as a Python expression and returns the result Signup and view all the answers

Why is it beneficial to use range() function in Python?

To generate a sequence of numbers for iteration purposes Signup and view all the answers