Practical Data Science using Python - Python User-Defined Functions

The video tutorial explains the concept of user defined functions in Python, highlighting their importance in code reuse and maintainability. It covers the syntax, including the use of the 'def' statement, input arguments, and the ability to return multiple values. The tutorial also introduces docstrings for documentation and discusses the scope of variables, distinguishing between global and local scopes.

What is the primary reason for using user-defined functions in programming?

• To increase the execution speed of the program

• To avoid repeating the same code multiple times

• To make the code more complex

• To reduce the number of variables used

Which keyword is used to define a function in Python?

• func

• def

• define

• function

What is a docstring in Python?

• A string that is used to return values

• A string that is used to print output

• A string that documents the function's purpose

• A string that stores function arguments

How many return values can a Python function have?

• Only one

• Two

• None

• Multiple

What is the result of a function returning multiple values in Python?

• A set

• A dictionary

• A list

• A tuple

What is the scope of a variable defined inside a function?

• Global

• Local

• Static

• Universal

Where can a global variable be accessed in a Python program?

• Only in the module it is defined

• Only in the main function

• Anywhere in the program

• Only within the function it is defined

What happens if you try to access a local variable outside its function?

• It returns None

• It causes an error

• It behaves like a global variable

• It returns a default value

In the provided example, what is the value of the global variable 'testware_G'?

• 5

• 20

• 10

• 15

Why is 'testware_L' not accessible outside the function in the example?

• Because it is a constant

• Because it is a local variable

• Because it is not initialized

• Because it is a global variable