10+ Kanwar Enterprises Interview Questions and Answers

Class, object, abstraction, encapsulation are fundamental concepts in Java programming.

• Class is a blueprint for creating objects that defines its properties and methods.

• Object is an instance of a class that has its own state and behavior.

• Abstraction is the process of hiding implementation details and showing only essential features.

• Encapsulation is the mechanism of wrapping data and code together into a single unit.

• Example: A class 'Car' can have properties like 'make', 'mode...read more

My strong point is problem-solving and my weak point is public speaking.

• Strong point: I enjoy breaking down complex problems and finding solutions.

• Weak point: I get nervous when speaking in front of large groups.

• Example for strong point: In my previous internship, I was able to identify and fix a bug in the code that had been causing errors for weeks.

• Example for weak point: During a presentation in college, I stumbled over my words and lost my train of thought.

HTML stands for Hypertext Markup Language.

• HTML is a markup language used to create web pages.

• It uses tags to define the structure and content of a web page.

• HTML can be combined with CSS and JavaScript to create interactive web pages.

• Examples of HTML tags include , , ,

  , , , etc.

Constructor is used to initialize an object while method is used to perform a specific task.

• Constructor is called automatically when an object is created while method is called explicitly.

• Constructor has the same name as the class while method has a unique name.

• Constructor does not have a return type while method has a return type.

• Example of constructor: public class Person { public Person() { // constructor code } }

• Example of method: public void printName() { // method code ...read more

Error is a compile-time issue, while exception is a runtime issue. Exceptions are handled using try-catch blocks in Java.

• Error is a compile-time issue, detected by the compiler. Exception is a runtime issue, occurring during program execution.

• Errors are generally caused by the environment in which the application is running, while exceptions are caused by the application itself.

• In Java, exceptions are handled using try-catch blocks. The code that may throw an exception is pla...read more

Final is a keyword used to declare constants, Finally is a block of code that always executes, and Finalize is a method used for cleanup.

• Final is used to declare constants in Java.

• Finally is a block of code that always executes, typically used in try-catch-finally blocks.

• Finalize is a method in Java used for cleanup operations before an object is garbage collected.

An interface is a contract that defines a set of methods and properties that a class must implement.

• An interface is a blueprint for a class.

• It contains only the method signatures and properties.

• It does not contain any implementation code.

• A class can implement multiple interfaces.

• Interfaces are used for achieving abstraction and polymorphism.

• Example: IDisposable interface in C#.

• Example: Runnable interface in Java.

Inheritance is a mechanism in object-oriented programming where a class inherits properties and behaviors from another class.

• Inheritance allows code reuse and promotes code organization.

• In Java, classes can only inherit from a single class (single inheritance), while in C++, classes can inherit from multiple classes (multiple inheritance).

• Java uses the 'extends' keyword to implement inheritance, while C++ uses the ':' symbol.

• In Java, all classes implicitly inherit from the 'O...read more

Joins are used in databases to combine rows from two or more tables based on a related column between them.

• Joins are used to retrieve data from multiple tables in a single query.

• Right join returns all the rows from the right table and the matching rows from the left table.

• Left join returns all the rows from the left table and the matching rows from the right table.

• In right join, if there is no match, NULL values are returned for the left table.

• In left join, if there is no mat...read more

Java is a popular programming language known for its platform independence.

• Java is an object-oriented language.

• It was developed by Sun Microsystems.

• Java programs are compiled into bytecode and run on a Java Virtual Machine (JVM).

• Java supports inheritance, which allows classes to inherit properties and behaviors from other classes.

• Inheritance promotes code reusability and helps in creating a hierarchical class structure.

Java is a high-level programming language that follows the principle of 'write once, run anywhere' using the Java Virtual Machine (JVM).

• Java code is compiled into bytecode, which is then executed by the JVM.

• Java is platform-independent, meaning the same code can run on any device with a JVM.

• Java supports object-oriented programming concepts like classes, objects, and inheritance.

• Java has a rich set of libraries and frameworks for various applications.

• Java applications are typ...read more