Introduction: Java 8 Interview Questions

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• 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?

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