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

Coding challenges

So far, we've covered the most popular sorting and searching algorithms that are encountered in technical interviews. It is advised that you practice these algorithms since they may occur as standalone problems that require the pseudocode or the implementation.

That being said, let's tackle 18 problems that are related to sorting and searching algorithms.

Coding challenge 1 – Merging two sorted arrays

Amazon, Google, Adobe, Microsoft, Flipkart

Problem: Consider you've been given two sorted arrays, p and q. The p array is large enough to fit q at the end of it. Write a snippet of code that merges p and q in a sorted order.

Solution: It is important to highlight the fact that p has enough space at the end to fit q. This suggests that the solution shouldn't involve any auxiliary space. The solution should output the result of merging p and q in a sorted order by inserting the elements from q in p in order.

Mainly, we should...