Infosys Java Developer Interview Questions, Process, and Tips for Experienced

Using lambda expressions in Java 8 to print a message

• Use the lambda syntax (parameters) -> { body } to define the behavior

• Example: () -> System.out.println("Hello, World!")

Functional Interface is an interface with only one abstract method. Flat Map is used to flatten nested collections. Method Reference is a shorthand notation for lambda expressions. Stream API is used to process collections of objects.

• Functional Interface is an interface with a single abstract method, such as Runnable or Comparator.

• Flat Map is a method in Java that is used to flatten nested collections, like List> ...read more

FlatMap is a method in Java that transforms each element of a stream into a new stream and then concatenates all the streams into a single stream.

• FlatMap is used to flatten nested collections or maps into a single collection.

• It is commonly used in Java streams to process and transform data efficiently.

• Example: List> nestedList = Arrays.asList(Arrays.asList(1, 2), Arrays.asList(3, 4)); nestedList.stream().flatMap(L

Stream API is a feature in Java that allows processing collections of objects in a functional style.

• Stream API provides a way to perform operations on collections like filter, map, reduce, etc.

• It supports functional programming paradigms like lambda expressions and method references.

• Example: List names = Arrays.asList("Alice", "Bob", "Charlie"); Stream stream = names.stream();