Book Image

The Complete Coding Interview Guide in Java

By : Anghel Leonard
Book Image

The Complete Coding Interview Guide in Java

By: Anghel Leonard

Overview of this book

Java is one of the most sought-after programming languages in the job market, but cracking the coding interview in this challenging economy might not be easy. This comprehensive guide will help you to tackle various challenges faced in a coding job interview and avoid common interview mistakes, and will ultimately guide you toward landing your job as a Java developer. This book contains two crucial elements of coding interviews - a brief section that will take you through non-technical interview questions, while the more comprehensive part covers over 200 coding interview problems along with their hands-on solutions. This book will help you to develop skills in data structures and algorithms, which technical interviewers look for in a candidate, by solving various problems based on these topics covering a wide range of concepts such as arrays, strings, maps, linked lists, sorting, and searching. You'll find out how to approach a coding interview problem in a structured way that produces faster results. Toward the final chapters, you'll learn to solve tricky questions about concurrency, functional programming, and system scalability. By the end of this book, you'll have learned how to solve Java coding problems commonly used in interviews, and will have developed the confidence to secure your Java-centric dream job.
Table of Contents (25 chapters)
1
Section 1: The Non-Technical Part of an Interview
7
Section 2: Concepts
12
Section 3: Algorithms and Data Structures
19
Section 4: Bonus – Concurrency and Functional Programming

Chapter 18: Unit Testing

As a developer (or software engineer), you must have skills in the testing field as well. For example, developers are responsible for writing the unit tests of their code (for example, using JUnit or TestNG). Most probably, a pull request that doesn't contain unit tests as well won't be accepted.

In this chapter, we will cover unit testing interview problems that you may encounter if you apply for a position such as developer or software engineer. Of course, if you are looking for a tester (manual/automation) position, then this chapter may represent just another perspective of testing, so do not expect to see questions specific to manual/automation tester positions here. In this chapter, we'll cover the following topics:

  • Unit testing in a nutshell
  • Questions and coding problems

Let's begin!