Introduction: Java 8 Interview Questions
Java 8 is one of the major release from Java with features like Streams, Lambdas etc. A lot of companies are looking for a software developers proficient in Java 8 features.
This book contains basic to expert level Java 8 interview questions that an interviewer asks. Each question is accompanied with an answer so that you can prepare for job interview in short time.
We have compiled this list after attending dozens of technical interviews in top-notch companies like- Google, Facebook, Netflix, Amazon etc.
Often, these questions and concepts are used in our daily programming work. But these are most helpful when an Interviewer is trying to test your deep knowledge of Java 8 features.
How will this book help me?
By reading this book, you do not have to spend time searching the Internet for Java 8 interview questions. We have already compiled the list of the most popular and the latest Java 8 Interview questions.
Are there answers in this book?
Yes, in this book each question is followed by an answer. So you can save time in interview preparation.
What is the best way of reading this book?
You have to first do a slow reading of all the questions in this book. Once you go through them in the first pass, mark the questions that you could not answer by yourself. Then, in second pass go through only the difficult questions. After going through this book 2-3 times, you will be well prepared to face a technical interview for Software Engineer position in Java 8 version.
What is the level of questions in this book?
This book contains questions that are good for a Associate Software engineer to a Senior Software engineer. The difficulty level of question varies in the book from a Fresher to an Experienced professional.
What are the sample questions in this book?
- How does Internal Iteration work in Java 8?
- Can we provide implementation of a method in a Java Interface?
- What are the main differences between an interface with default method and an abstract class in Java 8?
- Is it mandatory to use @FunctionalInterface annotation to define a Functional interface in Java 8?
- How can we get duration between two dates or time in Java 8?
- What is the new method family introduced in Java 8 for processing of Arrays on multi core machines?
- What are the differences between Collection and Stream API in Java 8?
- What are the new features released in Java 8?
- What are the main benefits of new features introduced in Java 8?
- What is a Lambda expression in Java 8?
- What are the three main parts of a Lambda expression in Java?
- What is the data type of a Lambda expression?
- Why did Oracle release a new version of Java like Java 8?
- What are the advantages of a lambda expression?
- What is a Functional interface in Java 8?
- What is a Single Abstract Method (SAM) interface in Java 8?
- How can we define a Functional interface in Java 8?
- Why do we need Functional interface in Java?
- What are the main uses of Stream API in Java 8?
- What are the differences between Iterator and Spliterator in Java 8?
- How can we get current time by using Date/Time API of Java 8?
- What is Type Inference in Java 8?
- Does Java 7 support Type Inference?
- What are the main differences between Internal and External Iterator?
- What are the main advantages of Internal Iterator over External Iterator in Java 8?
- What are the applications in which we should use Internal Iteration?
