Nail Your Java Interview

Review critical Java concepts-and commonly-asked interview questions-to ensure that you approach your Java interviews with confidence.

Introduction

• The secret to nailing your Java interview
• Understand types of interview questions
• Get ready for your technical interview

1. Answering Java-Specific Questions

• What's the Java Virtual Machine?
• What's the JDK and JRE?
• What are classes, instances, and constructors?
• What's the difference between static and non-static methods?
• How is scope used in Java?
• How do you access modifiers restrict scope?

2. Leveraging New Java Features

• Understand the impact of Jigsaw
• Use optionals to avoid NullPointerExceptions
• Create Lambdas to pass functionality as data
• Use the Streams API to process collections
• Discuss the pros and cons of local variable type inference
• Leverage new switch expressions

3. Solving Technical Interview Questions: String Manipulation

• Concatenate strings with different methods
• Normalize string input
• Access data from strings
• Apply string functions in technical interviews
• Understand string equality
• Challenge: Developing a palindrome checker
• Solution: Developing a palindrome checker
• Challenge: Counting characters with string manipulation
• Solution: Counting characters with string manipulation

4. Solving Technical Interview Questions: Arrays and Linked Lists

• Review arrays for technical interviews
• Challenge: Maximum product of two numbers
• Solution: Maximum product of two numbers
• Mastering linked lists for whiteboard coding interviews
• Challenge: Delete the middle of a singly-linked list
• Solution: Delete the middle of a singly-linked list

5. Solving Technical Interview Questions: Stacks, Queues, and Hash-Based Structures

• Leveraging stacks as a data structure
• Using queues in technical interviews
• Mastering hash-based structures
• Challenge: Generate binary numbers
• Solution: Generate binary numbers
• Challenge: Matching parentheses
• Solution: Matching parentheses
• Challenge: Find most repeated word
• Solution: Find most repeated word

6. Solving Technical Interview Questions: Abstraction, Encapsulation, Inheritance, and Polymorphism

• Mastering abstraction for technical interviews
• Add encapsulation to your programs to impress interviewers
• Leveraging inheritance in your technical interview solutions
• Use polymorphism to reduce complexity in coding interviews
• Mastering polymorphism with a deeper look at Java

Conclusion

• Good luck in your interview