LTIMindtree Automation Test Engineer Interview Questions, Process, and Tips

HashMap and HashTable are both data structures used to store key-value pairs, but they differ in their implementation and features.

• HashMap is not synchronized and allows null values and keys, while HashTable is synchronized and does not allow null values or keys.

• HashMap is faster than HashTable for non-thread-safe operations, but HashTable is safer for thread-safe operations.

• HashMap uses Iterator to traverse the elemen...read more

Abstract class is a class that cannot be instantiated while abstract method is a method without implementation.

• Abstract class can have both abstract and non-abstract methods while abstract method can only exist in an abstract class or interface.

• Abstract class can have constructors while abstract method cannot.

• Abstract class can provide default implementation for its non-abstract methods while abstract method cannot.

• Exa...read more