Python and Computer Science Quiz

What is the output of 'print(3*2**3)' in Python?

• 12

• 24

• 30

• 18

Explain the difference between '==' and 'is' in Python.

• '==' checks for reference equality, while 'is' checks for value equality.

• '==' compares data types, while 'is' compares values.

• The '==' operator compares values, while the 'is' operator compares identities.

• '==' is used for string comparison, while 'is' is used for integer comparison.

What is the purpose of 'if __name__ == '__main__': in Python scripts?

• To define a new function

• To create a loop

• To import external libraries

• To check if the script is being run directly or imported as a module.

What is the difference between a list and a tuple in Python?

• Lists and tuples cannot store different data types.

• Lists and tuples have the same methods available for manipulation.

• Lists are immutable, tuples are mutable.

• Lists are mutable, tuples are immutable.

Explain the concept of object-oriented programming.

• Object-oriented programming does not involve the use of methods or functions.

• Object-oriented programming is a programming paradigm based on the concept of objects, which can contain data in the form of fields (attributes or properties) and code in the form of procedures (methods or functions). It allows for the organization of code into reusable and modular structures, promoting concepts such as encapsulation, inheritance, and polymorphism.

• Object-oriented programming is a programming paradigm based on the concept of variables only.

• Object-oriented programming does not support the concepts of encapsulation, inheritance, or polymorphism.

How can you handle exceptions in Python?

• Use for loops in Python.

• Use try-except blocks in Python.

• Use if-else statements in Python.

• Use switch-case statements in Python.

What is the use of 'self' in Python classes?

• It is used as a reference to the current instance of the class.

• It is used to access global variables within the class

• It is used to define a new class within the current class

• It is used to import external modules into the class

What is the difference between 'append()' and 'extend()' methods in Python lists?

• The 'append()' method adds a single element, whereas the 'extend()' method adds multiple elements to a Python list.

• The 'append()' method is used for strings, while the 'extend()' method is used for integers in Python lists.

• The 'append()' method adds multiple elements, whereas the 'extend()' method adds a single element to a Python list.

• Both 'append()' and 'extend()' methods add elements one by one to a Python list.

Explain the concept of recursion in programming.

• Recursion in programming is a technique where a function calls itself in order to solve a problem.

• Recursion is a technique where a function calls another function

• Recursion always leads to infinite loops

• Recursion can only be used in object-oriented programming

What is the purpose of 'import' in Python?

• To export data from Python scripts

• To delete existing functions in Python

• To bring in external modules or packages into the current Python script.

• To create new variables in Python