Top Python Interview Questions For 2020

Did you complete your Python Certification? Python’s craze as a programming language is on the rise with the widespread adoption and technological advancements. Lots of reputed companies and big firms are on the lookout for hiring talented Python experts.

 

Let us have a look at the Top Python Interview Questions, which guides you on how to ace any Python interview.

 

Python interview questions and answers:

 

Dive into the following questions and their answers to see how well-versed you are in this programming language.

1. What is Python?

Python is a portable high-level object-oriented programming language with objects, modules, threads, exceptions, and automatic memory management. It is a simple yet powerful programming language. It can run equally on different platforms such as Linux, Windows, UNIX, etc.

2. What are the Advantages of Using Python?

Following are the main advantages of using Python:

  1. Free and open source
  2. Portable
  3. Extensible
  4. Object-oriented
  5. Built-in data structure

3. What is PEP 8?

PEP 8 is a coding convention that specifies a set of guidelines for writing a more readable Python code.

 4. What do You Mean by Python Literals?

Python literals can be defined as data that is given in a variable or constant. There are five types of liberals in Python:

  1. String Literals
  2. Numeric Literals
  3. Boolean Literals
  4. Special Literals
  5. Literal Collections

 5. Explain Python Functions

A function is a block of code or a section of a program that has to written only once. It can then be used in the program whenever required. There are two types of functions:

  1. Built-in functions
  2. User-defined functions

 6. What is Python Zip () Function?

The Python zip () function enables users to transform multiple lists i.e., list1, list2, list3, etc. into one list of tuples by taking the corresponding elements of the lists that are passed as parameters.

7. What is Python’s Parameter Passing Mechanism?

There are two ways to pass parameters in Python:

  1. Pass by reference
  2. Pass by value

By default, all the parameters (arguments) are passed ‘by reference’ to the functions. If the value of the parameter is changed within a function, the change is reflected in the calling function. It is not the case in the Pass by Value mechanism. It is because of the immutable nature of them.

 8. What are The Modules and Packages in Python?

A module is a Python script that generally contains import functions, statements, classes, variable definitions, and Python runnable code. In the module, you can refer to the module name as a string that is stored in the global variable name. Python packages and Python modules are two mechanisms that allow for modular programming in Python.

 

Modules are simply Python files with a .py extension and can have a set of functions, classes, or variables defined and implemented. They can be imported and initialized once using the import statement.

 

Packages allow for hierarchical structuring of the module namespace using dot notation. As modules help avoid clashes between global variable names, similarly, packages help prevent conflicts between module names.

9. Differentiate Between a Tuple and a List

 

Tuples List
A tuple is a sequence of immutable objects. Lists are versatile data type which is mutable.
The syntax for tuples is shown by {}. The syntax for a list is shown by []
They have a fixed length. The list can be of variable length.
Example: tup_1 = {10, ’Alex’, 5} Example: list_1 = [10, ‘Alex’, 5]

10. What is Scope in Python?

Every object in Python functions within a scope. A scope is a block of code in which the object in Python remains relevant. Namespaces uniquely identify all the objects inside a program. Although, these namespaces have a scope defined for them where you can use their objects without any prefix.

11. What is Slicing?

A mechanism to select a range of items from sequence types like list, strings, tuple, etc. is known as slicing.

12. What are the Built-in Data-Types in Python?

The built-in data types of Python are:

  1.     Numbers- immutable
  2.     Strings- immutable
  3.     Tuples- immutable
  4.     List- mutable
  5.     Sets- mutable
  6.     Dictionary- mutable

 

13. What is an Anonymous Function or a Lambda Function?

A function that does not contain any name is known as an anonymous function or lambda function.

Syntax: Lambda arguments: expression

We can assign the lambda function to the variable and then call it through the variable.

14. What is Web Scraping? How Can You Achieve Web Scraping in Python?

It is a method of extracting large amounts of available information on websites and saving it onto the local machine or the database tables—for example, scrappy, pyquery, beautifulSoap, urllib2, etc.

15. What are Local Variables and Global Variables in Python?

Local variables are declared inside a function. These types of variables can be accessed only inside the function.

 Global variables are declared outside the function. These variables can be accessed or invoked by any function in the program.

16. What is Python Path?

Python Path is an environmental variable that is used to import a module. It is used to check the presence of the modules that are imported in different directories. Interpreters will determine the loading of the module.

17. What is The Function of Python Decorators?

Python Decorator is the most useful tool in Python as it allows programmers to alter the changes in class or function’s behavior.

18. Define Iterators in Python?

An iterator in Python can be defined as an object that can be iterated or traversed upon. It is mainly used to iterate a group of containers, elements, and the same as a list.

Conclusion

In this blog, we looked at Real-World Python interview questions asked by companies like Amazon, Google, Microsoft, and how to answer them, thus saving your interview preparation time. Whether you are a Python Expert or just a beginner, you can take a full Python training course or a Python crash course which can help you land a job in your dream company.