Plianto Technologies Interview Questions and Answers

Method overloading is a feature in Java that allows a class to have multiple methods with the same name but different parameters.

• Method overloading is achieved by changing the number of parameters, their types, or their order.

• The compiler determines which method to call based on the number and types of arguments passed.

• Method overloading is used to provide different ways of calling the same method with different inputs...read more

JVM architecture is the structure of the Java Virtual Machine that executes Java bytecode.

• JVM consists of class loader, runtime data area, execution engine, and native interface.

• Class loader loads class files into the runtime data area.

• Runtime data area is divided into method area, heap, stack, and PC register.

• Execution engine executes the bytecode.

• Native interface provides a way for Java code to interact with native c...read more

HashMap uses hashing technique to store and retrieve key-value pairs.

• HashMap uses an array of buckets to store key-value pairs

• Hashing technique is used to generate an index for each key

• If multiple keys have the same index, they are stored in a linked list

• HashMap allows null keys and values

• HashMap is not thread-safe and requires synchronization for concurrent access