22. Lambda Expressions and Functional Interfaces

Try these first

1. 1.

   What is a lambda expression?

   Hint

   Think of it as a shortcut for writing a function.

2. 2.

   Provide a simple example of a lambda expression.

   Hint

   Consider what this lambda does without parameters.

3. 3.

   What is a lambda expression?

   • A named function
   • An anonymous function
   • A regular function

   Hint

   Remember how it differs from regular named functions.

4. 4.

   True or False: A functional interface can have multiple abstract methods.

   Hint

   Think about the definition of a functional interface.

5. 5.

   Create a custom functional interface named 'StringProcessor' that processes a string and returns its length using a lambda expression.

   Hint

   What function processes and gives an output based on a string?

6. 6.

   Write a program that filters out all strings starting with the letter 'A' from a list of strings using lambda expressions.

   Hint

   Consider how you can identify and remove items based on a condition.