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 12: Stacks and Queues

This chapter covers the most popular interview coding challenges involving stacks and queues. Mainly, you will learn how to provide a stack/queue implementation from scratch and how to tackle coding challenges via Java's built-in implementations, such as the Stack class, and the Queue interface implementations, especially ArrayDeque. Commonly, a coding challenge from this category will ask you to build a stack/queue or will ask you to solve a certain problem using Java's built-in implementations. Depending on the problem, it may explicitly disallow you to call certain built-in methods that will lead you to finding an easy solution.

By the end of this chapter, you'll have a deep insight into stacks and queues, you'll be able to exploit their capabilities, and also recognize and write solutions that depend on stacks and queues.

In this chapter, you'll learn about the following topics:

  • Stacks in a nutshell
  • Queues...