Java frequently asked interview questions
What is the difference between an interface and an abstract class in Java? In Java, an interface and an abstract class are both used to define a contract for classes…
What is the difference between an interface and an abstract class in Java? In Java, an interface and an abstract class are both used to define a contract for classes…
In Java, a String is an immutable object that represents a sequence of characters. It means once a String is created, its value cannot be changed, any operation that appears…
We can implement a custom class that behaves like an array by creating a class that has an array as a private field, and implements the necessary methods to access…
Java streams are a powerful feature introduced in Java 8 that allow for functional-style programming and operations on data in collections. Some key features of Java streams include: Laziness: Stream…
In this post, we will see Java8 Streams Interview questions. What is the difference between a Stream and a Collection in Java 8 Stream represents a sequence of elements and…
In Java 8, streams use a technique called “lazy evaluation” to process data. Lazy evaluation means that a stream operation is not executed until it is absolutely necessary. This can…
A parallel stream is a stream that is capable of executing operations in parallel, meaning that the operations are divided into smaller tasks and executed concurrently on multiple threads. A…
the reduce method is used to perform a reduction operation on a stream, which combines all the elements in the stream into a single value. Here’s an example of using…
Supplier is a functional interface that defines a method called get() that returns an instance of a certain type without taking any arguments. The Supplier interface is commonly used to…
In this post we will see Collectors examples which used to collect elements. Collectors Examples The collect method is used to perform a reduction operation on a stream Used to…