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

Analogy

Imagine a scenario where you've found one of your favorite movies on the internet. You can order it or download it. Since you want to see it as soon as possible, which is the best way to proceed? If you order it, then it will take a day to arrive. If you download it, then it will take half a day to download. So, it is faster to download it. That's the way to go!

But wait! Just when you get ready to download it, you spot the Lord of the Rings Master Collection at a great price, and so you think about downloading it as well. Only this time, the download will take 2 days. However, if you place an order, then it will still only take a single day. So, placing an order is faster!

Now, we can conclude that no matters how many items we order, the shipping time remains constant. We call this O(1). This is a constant runtime.

Moreover, we conclude that the download time is directly proportional to the file sizes. We call this O(n). This is an asymptotic runtime.

...