Free computers and the internet Kindle books for 03 Oct 18

Top 50 Pandas Interview Questions & Answers

by Knowledge Powerhouse

Top 50 Pandas Interview Questions

This book contains Pandas (python library) interview questions that an interviewer asks. It is a compilation of easy to advanced Pandas interview questions after attending dozens of technical interviews in top-notch companies like- Oracle, Google, Ebay, Amazon etc. Each question is accompanied with an answer so that you can prepare for job interview in short time.

Often, these questions and concepts are used in our daily programming work. But these are most helpful when an Interviewer is trying to test your deep knowledge of Pandas concepts.

How will this book help me?

By reading this book, you do not have to spend time searching the Internet for Pandas interview questions. We have already compiled the list of the most popular and the latest Pandas Interview questions.

Are there answers in this book?

Yes, in this book each question is followed by an answer. So you can save time in interview preparation.

What is the best way of reading this book?

You have to first do a slow reading of all the questions in this book. Once you go through them in the first pass, mark the questions that you could not answer by yourself. Then, in second pass go through only the difficult questions. After going through this book 2-3 times, you will be well prepared to face a technical interview for Data Engineer position in Pandas.

What is the level of questions in this book?

This book contains questions that are good for a Associate Data engineer to a Principal Software engineer. The difficulty level of question varies in the book from a Fresher to an Experienced professional.

What are the sample questions in this book?

  • What is a Series in Pandas?
  • How can we create copy of series in Pandas?
  • How will you create a series from dict in Python?
  • What are operations on Series in pandas?
  • What is a DataFrame in pandas?
  • What are the different ways in which a DataFrame can be created in Pandas?
  • How will you create an empty DataFrame in pandas?
  • How will you add a column to a pandas DataFrame?
  • How will you add a scalar column with same value for all rows to a pandas DataFrame?
  • How will you retrieve a single column from pandas DataFrame?
  • How will you add the value of two columns in a pandas DataFrame to create another column?
  • How will you delete a column in a pandas DataFrame?
  • How can we select a column in pandas DataFrame?
  • How can we retrieve a row in pandas DataFrame?
  • How will you slice rows in a pandas DataFrame?
  • How will you append new rows to a pandas DataFrame?
  • How will you delete rows from a pandas DataFrame?
  • How will you get the number of rows and columns of a DataFrame in pandas?
  • How will you get the top 2 rows from a DataFrame in pandas?
  • How will you get the last 2 rows from a DataFrame in pandas?
  • How will you get the number of elements in a DataFrame in pandas?
  • How will you get the names of columns of a DataFrame in pandas?
  • How will you convert a DataFrame to an array in pandas?
  • How can you check if a DataFrame is empty in pandas?
  • How can you get the sum of values of a column in pandas DataFrame?
  • How will you get the average of values of a column in pandas DataFrame?
  • How can we get the statistical summary of data in a pandas DataFrame?
  • How will you apply a function to every data element in a DataFrame?
  • How will you apply a function to a row of pandas DataFrame?
  • How will you apply a function to a column of pandas DataFrame?
  • What is reindexing in pandas?
  • How will you rename a column in pandas DataFrame?



Web Robots: Boost your business with Robotic Process Automation and Web-Scraping on Web-marketing

by Arnaud Degardin

*** PRACTICAL GUIDE FOR BEGINNERS (AND NOT) OF WEB SCRAPING AND RPA ***

Web Robots is a manual to build your web-marketing robot for free through the use of TagUI an Open Source RPA and Web-scarping program.
In this book, the author, Arnaud DEGARDIN, guides the reader, both novice of Internet scraping or RPA, and an expert in the sector, through a series of techniques and tips that are extremely practical and immediately applied to benefit small businesses and mainly in the web-marketing sector for searching for internet contacts with robots.

Web Robots is suitable for anyone who wants to get immediate and tangible results. Tools, services and strategies here
presented are the result of years of experience in the sector and results obtained working on hundreds of real projects. The steps, all clearly illustrated and explained, allow the reader an immediate application of the concepts of online marketing to their specific case, skipping all the unnecessary explanations didascaliche or ex cathedra that usually read in many industry publications.

The Kindle version is the faithful reproduction of the printed version. Contains pages of notes, notes and exercises that obviously can not be used directly in the digital version. The reader is urged to reproduce the outline on his own block of notes, in order to improve his experience and always have with him the precious information found and revised during the reading of the book.



Learn SQL: A Practical Guide for SQL Server and Database Fundamentals

by Jacob Schulz

Have you always wanted to learn SQL and about databases but didn’t know how or where to get started? Not knowing where to start is usually the biggest hurdle in learning anything, thus most people never start.

But there’s no need to be afraid of learning SQL!

This book helps you break down those barriers and gets you on the path to learning SQL in a step-by-step fashion with the use of images, logical explanations, realistic exercises and allows you to gain hands-on experience with a custom project to better retain what you learn and help accelerate your progress. With this book, you’ll be able to pick up SQL quickly!

What You’ll Learn

When you finish reading and applying what’s in here, you’ll be able to:

  • Install and configure SQL Server and SQL Server Management Studio to be used for any size company
  • Pick up a new skill that can help open doors for you and help you earn more money
  • Transform and massage data for things like data warehousing or business analysis
  • Demonstrate your experience with tips on where you can host your own projects
  • Build queries, from simple to complex, and pull data for purposes like reports
  • Use the steps of Normalization to re-organize data to be put into a database
  • Perform straight-forward and effective database administrative tasks
  • Create databases and the components within it
  • Control users and their access to the database
  • Control data by adding and deleting records
  • And much more!

The need to support databases is critical, as businesses rely on them every day to run their operations and grow. In addition, many companies use Microsoft’s SQL Server as their choice of databases for its power, innovative design, flexibility and ability to scale – which this book covers. Any database or SQL related position will always be in-demand, as people like you are needed for its support and growth.

There’s no need to wait anymore. Go ahead and scroll up to the top of the page and click “Buy now” to learn and apply SQL and invest in yourself!



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