TCS Technical Lead 1 Interview Questions and Answers

This interview question covers various topics including programming, design patterns, data structures, and exception handling in Java.

• Write a program to generate the Fibonacci series

• Write a program using boolean variables

• Explain the ClassCastException and how to handle it

• Discuss the Singleton design pattern and its implementation with different JDK versions

• Explain abstract classes and interfaces in your current project

• ...read more

Access modifiers in method overriding

• Access modifiers in the overriding method cannot be more restrictive than the overridden method

• The access modifier can be less restrictive or the same as the overridden method

• Private methods cannot be overridden

• Examples: public method can be overridden by public or protected method, but not by private method

Covariant return types allow overriding methods to return a subtype of the original method's return type.

• 1. Covariant return types enable a subclass method to return a more specific type than its superclass method.

• 2. This feature enhances polymorphism and allows for more flexible APIs.

• 3. Example: If a superclass method returns an object of type 'Animal', a subclass can override it to return 'Dog'.

• 4. Syntax: public clas...read more