Python Interview Questions

Ultimate Guide to Success

Meenu Kohli

• Publisher: BPB Publications
• Year: 2019
• eBook ISBN: 9789388176743
• Topic: Computer Science
• Subtopic: Programming Games
• Index: Computer Science

Prepares yourself for coding related interview questions Key Features

• Strengthens the foundations.
• Lists down all important points that you need to know related to various topics in an organized manner.
• Prepares you with questions related to Algorithms and Data structures.
• Prepares you for theoretical questions.
• Provides In depth explanation of complex topics and Questions.
• Focuses on how to think logically to solve a problem.
• Follows systematic approach that will help you to prepare for an interview in short duration of time.
• Prepares you to think logically and answer interview questions.

Description
The book is written assuming that the reader has basic knowledge of Python programming. A brief introduction is provided for all relevant topics. Every topic is followed by all types of possible questions that an examiner or interviewer can ask the reader. The questions are arranged chapter wise so that it is easy for the reader to move from easy to complex questions. What Will You Learn

• Python Basics, Data Types and Their in-built Functions
• Operators, Decision Making and Loops
• User Defined Functions, Classes and Inheritance, Files
• Algorithm Analysis and Big-O, Array Sequence
• Stacks, Queues, and Deque, Linked List
• Recursion, Trees. Searching and Sorting

Who This Book Is For
Graduate, Post graduate, Academicians, Educationists, Professionals. Table of Contents SECTION I: PYTHON BASICS
? Introduction to Python
? Data Types and Their in-built Functions
? Operators in Python
? Decision Making and Loops
? User Defined Functions
? Classes and Inheritance
? Files SECTION II: PYTHON DATA STRUCTURE AND ALGORITHM
? Algorithm Analysis and Big-O
? Array Sequence
? Stacks, Queues, and Deque
? Linked List
? Recursion
? Trees
? Searching and Sorting About the Author
Meenu Kohli obtained her degree in BE (Electronics) from Pune University. She has worked as a developer, tester and trainer with some very well reputed MNCs. She has a good experience in software domain and worked on projects related to Python, Java, Java Beans, Enterprise Java Beans, C, C++, PHP, JSP, JavaScript, HTML, .NET, R, SQL and Software Testing. linkedIn Profile: linkedin.com/in/meenukohli78

CHAPTER 1

Introduction to Python

Python

• Python is a very popular programming language. It is known for being an interactive and object oriented programming language.
• Free software, open source language with huge number of volunteers who are working hard to improve it. This is the main reason why the language is current with the newest trends.
• It has several libraries which help build powerful code in short span of time.
• It is a very simple, powerful, and general purpose computer programming language.
• Python is easy to learn and easy to implement.
• Well known corporations are using Python to build their site. Some of the well know websites built in Python are as follows:

  ◆	Google	◆	YouTube
  ◆	Quora	◆	Dropbox
  ◆	Yahoo!	◆	Reddit
  ◆	Instagram	◆	Spotify
  ◆	Survey Monkey	◆	Bitly

• Main reason for popularity of Python programming language is simplicity of the code.
• You require no skills to learn Python.

Question: What can you do with python?

Answer: There is no limit to what can be achieved with the help of Python Programming:

• Python can be used for small or large, online or offline applications.
• Developers can code using fewer lines of code compared to other languages.
• Python is widely used for developing web applications as it has a dynamic system and automatic memory management is one of its strongest points.
• Some of the very well-known Python framework are: Pyramid, Django, and Flask.
• Python is also used for simple scripting and scientific modelling and big data applications:
• It is the number one choice for several data scientists.
• Its libraries such as NumPy, Pandas data visualization libraries such as Matplotlib and Seaborn have made Python very popular in this field.
• Python also has some interesting libraries such as Scikit-Learn, NLTK, and TensorFlow that implement Machine learning Algorithms.
• Video Game can be created using PyGame module. Such applications can run on Android devices.

• Python can be used for web scrapping.
• Selenium with Python can be used for things like opening a browser or posting a status on Facebook.
• Modules such a Tkinter and PyQt allow you to build a GUI desktop application.

Question: Why is Python considered to be a highly versatile programming language?

Answer: Python is considered to be a high versatile programming language because it supports multiple models of programming such as:

• OOP
• Functional
• Imperative
• Procedural

Question: What are the advantages of choosing Python over any other programming language?

Answer: The advantages of selecting Python over other programming languages are as follows:

• Extensible in C and C++.
• It is dynamic in nature.
• Easy to learn and easy to implement.
• Third party operating modules are present: As the name suggests a third party module is written by third party which means neither you nor the python writers have developed it. However, you can make use of these modules to add functionality to your code.

Question: What do you mean when you say that Python is an interpreted language?

Answer: When we say that Python is an interpreted language it means that python code is not compiled before execution. Code written in compiled languages such as Java can be executed directly on the processor because it is compiled before runtime and at the time of execution it is available in the form of machine language that the computer can understand. This is not the case with Python. It does not provide code in machine language before runtime. The translation of code to machine language occurs while the program is being executed.

Question: Are there any other interpreted languages that you have heard of?

Answer: Some frequently used interpreted programming languages are as follows:

• Python
• Pearl
• JavaScript
• PostScript
• PHP
• PowerShell

Question: Is Python dynamically typed?

Answer: Yes, Python is dynamically typed because in a code we need not specify the type of variables while declaring them. The type of a variable is not known until the code is executed.

Question: Python is a high level programming language? What is a need for high level programming languages?

Answer: High level programming languages act as a bridge between the machine and humans. Coding directly in machine language can be a very time consuming and cumbersome process and it would definitely restrict coders from achieving their goals. High level programming languages like Python, JAVA, C++, etc are easy to understand. They are tools which the programmers can use for advanced level programming. High level languages allow...

Table of contents

• Cover
• Python Interview Questions
• Copyright
• Preface
• Foreword
• Acknowledgement
• Table of Contents
• Chapter 1 Introduction to Python
• Chapter 2 Data Types and Their in-built Functions
• Chapter 3 Operators in Python
• Chapter 4 Decision Making and Loops
• Chapter 5 User Defined Functions
• Chapter 6 Classes and Inheritance
• Chapter 7 Files
• Chapter 8 Algorithm Analysis and Big-O
• Chapter 9 Array Sequence
• Chapter 10 Stacks, Queues, and Deque
• Chapter 11 Linked List
• Chapter 12 Recursion
• Chapter 13 Trees
• Chapter 14 Searching and Sorting