ExcelR Solutions Interview Questions and Answers

Method overloading is having multiple methods with the same name but different parameters. Method overriding is having a method in a subclass with the same name and parameters as a method in its superclass.

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

• Method overriding is used to provide a specific implementation of a method that is already provided by its superclass.

• Method overloading is resolved at compile-time bas...read more

Compiler translates entire code to machine language, while interpreter translates line by line.

• Compiler generates object code, while interpreter executes code directly.

• Compiler is faster, but interpreter is more flexible.

• Examples of compilers: GCC, Clang. Examples of interpreters: Python, Ruby.

• Compilers are used for languages like C, C++, while interpreters are used for languages like Python, Ruby, JavaScript.

The main function of exception is to handle errors and unexpected events in a program.

• Exceptions allow for graceful handling of errors and prevent program crashes.

• They provide a way to transfer control from one part of the program to another.

• Exceptions can be caught and handled in a try-catch block.

• Examples of exceptions include divide-by-zero, null pointer, and file not found errors.

A program to print numbers from 1 to 10.

• Use a loop to iterate from 1 to 10.

• Print each number in the loop.

• Ensure the loop stops at 10.

An amplifier is an electronic device that increases the amplitude of a signal.

• Amplifiers are commonly used in audio systems to increase the volume of sound.

• They can also be used in radio and television broadcasting to boost the strength of signals.

• Amplifiers come in different types such as transistor, vacuum tube, and operational amplifiers.

• They can be designed for different purposes such as power amplifiers, voltage amplifiers, and current amplifiers.

JVM stands for Java Virtual Machine. It is an abstract machine that enables a computer to run Java programs.

• JVM is responsible for interpreting Java bytecode and executing it on the computer.

• It provides a platform-independent environment for Java programs to run on different operating systems.

• JVM has various components like class loader, bytecode verifier, and execution engine.

• Examples of JVM-based languages include Java, Kotlin, and Scala.