IBM Senior Engineer Interview Questions and Answers

Hackerrank coding & techinical interview test

Q1. What is mutable type
Ans. 
A mutable type is a data type whose values can be changed after they are created.
• Mutable types include lists, dictionaries, and sets in Python.

• Changes to mutable objects affect all references to that object.

• Example: list1 = [1, 2, 3], list1[0] = 4 will change the value of list1 to [4, 2, 3].
Answered by AI
Add your answer
Q2. What is functional interface
Ans. 
A functional interface is an interface that contains only one abstract method.
• Functional interfaces can have multiple default or static methods.

• Examples include Runnable, Callable, and ActionListener interfaces.

• Functional interfaces can be implemented using lambda expressions.
Answered by AI
Add your answer
Q3. Updates in java 17
Ans. 
Java 17 introduces new features like sealed classes, pattern matching for switch statements, and more.
• Sealed classes restrict which classes can be subclasses

• Pattern matching for switch statements simplifies code by combining declaration and assignment

• New APIs like JEP 356: Enhanced Pseudo-Random Number Generators
Answered by AI
Add your answer

Basic aptitude on java application and framework

3 dsa questions and various golang concepts and 1 concurrency question

Q1. System design questions
Add your answer