About and History of Python
1. Who is the creator of Python?
a) Larry Page
b) Guido van Rossum
c) Mark Zuckerberg
d) Bill Gates
Answer: b) Guido van Rossum
Explanation: Guido van Rossum created Python in the late 1980s while working at the National Research Institute for Mathematics and Computer Science in the Netherlands.
2.Which of the following is NOT a feature of Python?
a) Object-oriented programming
b) Static typing
c) Dynamic semantics
d) High-level language
Answer: b) Static typing
Explanation: Python is a dynamically typed language, meaning that variable types are determined at runtime rather than at compile time. This allows for more flexibility and easier readability.
3.In what year was the first version of Python released?
a) 1985
b) 1990
c) 1995
d) 2000
Answer: b) 1990
Explanation: The first version of Python, version 0.9.0, was released in February 1991.
4.What is the significance of the name “Python”?
a) It was named after the snake species.
b) It was named after a character in a popular book series.
c) It was named after the Monty Python comedy troupe.
d) It has no significant meaning.
Answer: c) It was named after the Monty Python comedy troupe.
Explanation: Guido van Rossum named Python after the Monty Python comedy troupe, as he was a big fan of their work.
5. Which of the following is NOT a popular application of Python?
a) Web development
b) Data science
c) Robotics
d) Network programming
Answer: c) Robotics
Explanation: While Python can be used in robotics, it is not typically considered one of its primary applications. The other three options are all popular uses of Python.
6.Which of the following statements is true about Python?
a) It is a compiled language.
b) It is a scripting language.
c) It is a low-level language.
d) It is not an object-oriented language.
Answer: b) It is a scripting language.
Explanation: Python is a scripting language, which means that it is interpreted rather than compiled. This allows for greater flexibility and ease of use, as code can be executed line-by-line without the need for compilation.
7. Which of the following is NOT a reason why Python is popular among developers?
a) It has a steep learning curve.
b) It has a large and supportive community.
c) It is easy to read and write.
d) It is highly versatile and can be used in a wide range of applications.
Answer: a) It has a steep learning curve.
Explanation: One of the main reasons why Python is popular among developers is its ease of use and readability. It is considered to be one of the most beginner-friendly programming languages and has a large and supportive community of developers. Its versatility and wide range of applications also make it a popular choice.
8.Which of the following is a popular web framework for Python?
a) Django
b) Ruby on Rails
c) Node.js
d) Flask
Answer: a) Django
Explanation: Django is a popular web framework for Python that is used for building web applications. It provides a high-level, all-in-one solution for building complex web applications quickly and easily.
9.What is the latest version of Python as of September 2021?
a) Python 2.7
b) Python 3.5
c) Python 3.8
d) Python 3.10
Answer: d) Python 3.10
Explanation: As of September 2021, the latest stable version of Python is Python 3.10, which was released in October 2021.
10.Which of the following is a popular package for scientific computing in Python?
a) NumPy
b) jQuery
c) Bootstrap
d) React
Answer: a) NumPy
Explanation: NumPy is a popular package for scientific computing in Python. It provides fast and efficient array operations, linear algebra functions, and more. The other three options are popular web development frameworks and libraries.
11.Which of the following statements about Python is true?
a) Python is a high-performance language that is used mainly for system programming.
b) Python is a statically typed language, which means that variable types are determined at compile time.
c) Python is an interpreted language, which means that code is executed line-by-line.
d) Python does not support object-oriented programming.
Answer: c) Python is an interpreted language, which means that code is executed line-by-line.
Explanation: Python is an interpreted language, which means that code is executed line-by-line rather than being compiled into machine code before execution. This allows for more flexibility and easier readability.
12. What is PEP 8?
a) A popular web framework for Python
b) A standard for formatting Python code
c) A package for scientific computing in Python
d) A protocol for network programming in Python
Answer: b) A standard for formatting Python code
Explanation: PEP 8 is a document that provides guidelines for formatting Python code. It covers everything from naming conventions to indentation and is widely used by developers to ensure that their code is readable and maintainable.
13.Which of the following is NOT a data structure in Python?
a) List
b) Tuple
c) Dictionary
d) Stack
Answer: d) Stack
Explanation: While a stack is a common data structure in computer science, it is not a built-in data structure in Python. The other three options are all built-in data structures in Python.
14.What is a virtual environment in Python?
a) A separate installation of Python that is used for development and testing.
b) A way to create multiple instances of the same Python interpreter on a single machine.
c) A way to isolate Python dependencies and packages for a specific project.
d) A tool for managing Python packages and dependencies.
Answer: c) A way to isolate Python dependencies and packages for a specific project.
Explanation: A virtual environment in Python is a way to isolate dependencies and packages for a specific project. This allows for greater flexibility and makes it easier to manage dependencies across multiple projects.
15. Which of the following is a popular machine learning library for Python?
a) Scikit-learn
b) TensorFlow
c) PyTorch
d) All of the above
Answer: d) All of the above
Explanation: Scikit-learn, TensorFlow, and PyTorch are all popular machine learning libraries for Python. They provide a wide range of tools and functions for building and training machine learning models.
16. What is the purpose of the “if name == ‘main’:” statement in a Python script?
a) It is used to define the main function of the script.
b) It is used to define the arguments that can be passed to the script.
c) It is used to ensure that the script is only executed if it is the main program.
d) It is used to import modules and libraries into the script.
Answer: c) It is used to ensure that the script is only executed if it is the main program.
Explanation: The “if name == ‘main’:” statement is used to ensure that a Python script is only executed if it is the main program. This allows the script to be imported as a module into other programs without executing its main code block.
17. What is a decorator in Python?
a) A way to add functionality to an existing function or class without modifying its code.
b) A way to define a new function or class with a specific set of arguments.
c) A way to iterate over a sequence of elements in a function or class.
d) A way to encapsulate data and functionality in a single object.
Answer: a) A way to add functionality to an existing function or class without modifying its code.
Explanation: A decorator in Python is a way to add functionality to an existing function or class without modifying its code. It allows you to modify the behavior of a function or class without changing its source code.
About and History of Python
18.What is a lambda function in Python?
a) A function that is defined inline and does not have a name.
b) A function that is defined as a method of a class.
c) A function that is defined to accept an arbitrary number of arguments.
d) A function that is used to raise an exception.
Answer: a) A function that is defined inline and does not have a name.
Explanation: A lambda function in Python is a function that is defined inline and does not have a name. It is used for small, one-off functions that do not require a formal definition.
19.What is a generator in Python?
a) A function that returns a sequence of values, one at a time.
b) A way to create multiple instances of the same Python interpreter on a single machine.
c) A way to isolate Python dependencies and packages for a specific project.
d) A protocol for network programming in Python.
Answer: a) A function that returns a sequence of values, one at a time.
Explanation: A generator in Python is a function that returns a sequence of values, one at a time, using the “yield” keyword. This allows the function to generate values on-the-fly, rather than generating all of the values at once and returning them as a list or tuple.
20. What is the purpose of the “pass” statement in Python?
a) It is used to define a function or class that does nothing.
b) It is used to indicate that a function or class has not been implemented yet.
c) It is used to define an empty code block in a function or class.
d) It is used to break out of a loop or switch statement.
Answer: c) It is used to define an empty code block in a function or class.
Explanation: The “pass” statement in Python is used to define an empty code block in a function or class. It is often used as a placeholder for code that has not been implemented yet.
21. What is the purpose of the “assert” statement in Python?
a) It is used to check if a condition is True and raise an error if it is not.
b) It is used to catch and handle exceptions in Python code.
c) It is used to define a block of code that will be executed if an exception occurs.
d) It is used to define a new exception class in Python.
Answer: a) It is used to check if a condition is True and raise an error if it is not.
Explanation: The “assert” statement in Python is used to check if a condition is True and raise an error if it is not. It is often used for debugging purposes, to ensure that a particular condition holds true at a specific point in the program.
22.What is a set in Python?
a) A collection of unique, unordered elements.
b) A collection of ordered elements.
c) A collection of key-value pairs.
d) A collection of functions and methods.
Answer: a) A collection of unique, unordered elements.
Explanation: A set in Python is a collection of unique, unordered elements. It is similar to a list or tuple, but it does not allow duplicate elements.
23.What is a dictionary in Python?
a) A collection of unique, unordered elements.
b) A collection of ordered elements.
c) A collection of key-value pairs.
d) A collection of functions and methods.
Answer: c) A collection of key-value pairs.
Explanation: A dictionary in Python is a collection of key-value pairs, where each key is associated with a value. It is similar to a hash table or associative array in other programming languages.
24.What is a module in Python?
a) A file containing Python code that can be imported into other Python programs.
b) A way to group related Python functions and classes together.
c) A way to define a new Python data type.
d) A way to define a new Python exception class.
Answer: a) A file containing Python code that can be imported into other Python programs.
Explanation: A module in Python is a file containing Python code that can be imported into other Python programs. It allows you to reuse code across multiple programs and organize your code into separate files for better maintainability.
25.What is a package in Python?
a) A collection of related Python modules.
b) A way to define a new Python data type.
c) A way to define a new Python exception class.
d) A way to define a new Python function or method.
Answer: a) A collection of related Python modules.
Explanation: A package in Python is a collection of related Python modules, organized into a directory hierarchy. It allows you to group related functionality together and share it across multiple programs.
About and History of Python
26. Who is the creator of Python?
a) Larry Page
b) Guido van Rossum
c) Mark Zuckerberg
d) Bill Gates
Answer: b) Guido van Rossum
Explanation: Guido van Rossum created Python in the late 1980s while working at the National Research Institute for Mathematics and Computer Science in the Netherlands.
27.Which of the following is NOT a feature of Python?
a) Object-oriented programming
b) Static typing
c) Dynamic semantics
d) High-level language
Answer: b) Static typing
Explanation: Python is a dynamically typed language, meaning that variable types are determined at runtime rather than at compile time. This allows for more flexibility and easier readability.
28.What is PEP 8?
A. A Python library for plotting graphs
B. A Python module for parsing XML
C. A style guide for Python code
D. A Python package for web development
Answer: C
Explanation: PEP 8 is a style guide for Python code that recommends guidelines for formatting, naming conventions, and other aspects of code style.
29. What is a variable in Python?
A. A container for data values
B. A function that returns a value
C. A type of loop
D. A way to define classes
Answer: A
Explanation: A variable is a container for data values in Python. Variables can hold different types of data, such as strings, integers, or lists.
30. What is a function in Python?
A. A container for data values
B. A type of loop
C. A way to define classes
D. A block of code that performs a specific task
Answer: D
Explanation: A function in Python is a block of code that performs a specific task. Functions can take parameters as input and return values as output.
31. What is a list in Python?
A. A container for data values
B. A type of loop
C. A way to define classes
D. A sequence of values, separated by commas and enclosed in square brackets
Answer: D
Explanation: A list in Python is a sequence of values, separated by commas and enclosed in square brackets. Lists can hold different types of data, such as strings, integers, or other lists.
32. What is a tuple in Python?
A. A container for data values
B. A type of loop
C. A way to define classes
D. A sequence of values, separated by commas and enclosed in parentheses
Answer: D
Explanation: A tuple in Python is a sequence of values, separated by commas and enclosed in parentheses. Tuples are similar to lists, but they are immutable, which means their values cannot be changed once they are defined.
33. What is a dictionary in Python?
A. A container for data values
B. A type of loop
C. A way to define classes
D. A collection of key-value pairs, enclosed in curly braces
Answer: D
Explanation: A dictionary in Python is a collection of key-value pairs, enclosed in curly braces. Each key-value pair maps a key to a valu
34. What is the difference between a list and a tuple in Python?
A. A list is mutable, while a tuple is immutable
B. A tuple is mutable, while a list is immutable
C. Both lists and tuples are mutable
D. Both lists and tuples are immutable
Answer: A
Explanation: A list in Python is mutable, which means its values can be changed after it is defined. A tuple is immutable, which means that its elements cannot be changed after it is defined.
35. What is a module in Python?
A. A file containing Python code
B. A function that returns a value
C. A way to define classes
D. A container for data values
Answer: A
Explanation: A module in Python is a file containing Python code. Modules can be imported into other Python programs to use the code they contain.
36.What is a package in Python?
A. A way to define classes
B. A container for data values
C. A collection of related modules
D. A function that returns a value
Answer: C
Explanation: A package in Python is a collection of related modules. Packages can be organized in a hierarchical directory structure and can contain other packages as well as modules.
37.What is a class in Python?
A. A container for data values
B. A way to define functions
C. A way to define modules
D. A blueprint for creating objects
Answer: D
Explanation: A class in Python is a blueprint for creating objects. Classes define the properties and behavior of objects, and can be used to create multiple instances of the same type of object.
38.What is an object in Python?
A. A container for data values
B. An instance of a class
C. A way to define functions
D. A way to define modules
Answer: B
Explanation: An object in Python is an instance of a class. Objects have properties and behavior defined by their class, and can be used to perform tasks and store data.
39. What is inheritance in Python?
A. A way to define functions
B. A way to define classes
C. A way to define modules
D. A way to define objects
Answer: B
Explanation: Inheritance in Python is a way to create a new class that is a modified version of an existing class. The new class inherits properties and behavior from the existing class, and can also have its own properties and behavior.
40. What is encapsulation in Python?
A. A way to define functions
B. A way to define modules
C. A way to hide data and behavior within a class
D. A way to define objects
Answer: C
Explanation: Encapsulation in Python is a way to hide the data and behavior of a class from other parts of the program. This is achieved by using access modifiers to control which parts of the class are visible to other parts of the program.
41. What is polymorphism in Python?
A. A way to define functions
B. A way to define modules
C. A way to hide data and behavior within a class
D. A way to use objects of different classes interchangeably
Answer: D
Explanation: Polymorphism in Python is a way to use objects of different classes interchangeably, as long as they share a common interface. This allows code to be written more generically and to work with a wider range of objects.
42. What is the difference between == and is in Python?
A. == compares object identity, while is compares object values
B. == compares object values, while is compares object identity
C. Both == and is compare object identity
D. Both == and is compare object values
Answer: B
Explanation: The == operator in Python compares object values, while the is operator compares object identity. This means that == will return True if two objects have the same value, while is will return True only if two objects are the same object in memory.