In2IT Technologies Java Developer Interview Questions, Process, and Tips

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Q1. What is class use in java
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A class is a blueprint for creating objects in Java. It defines the properties and behaviors that objects of the class will have.
• A class is used to create objects in Java.

• It defines the attributes (variables) and methods (functions) that objects will have.

• Objects are instances of a class.

• Classes can be used to organize and structure code.

• Inheritance allows classes to inherit properties and behaviors from other classes.

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Q2. It is blue print of java
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Blue print is a sun microsystems best practice and enterprice in java developer
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Q3. Difference between exception and error
Ans. 
Exceptions are recoverable errors that can be handled programmatically, while errors are severe issues that cannot be recovered from.
• Exceptions are subclasses of the Exception class, while errors are subclasses of the Error class.

• Exceptions are caused by the application code and can be caught and handled using try-catch blocks.

• Errors are typically caused by the environment or system and cannot be easily recovered from.

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Q4. Exception is a we can't solve in problem in programmatically
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Ya really an exception is an abnormal event that araised during the execution of the program
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Q5. Error is a we can solve in programmatically
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Q6. What is abstraction
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Abstraction is the process of hiding implementation details while showing only the necessary information to the user.
• Abstraction is achieved through abstract classes and interfaces.

• It helps in reducing complexity and increasing efficiency.

• For example, a car dashboard is an abstraction of the car's internal workings.

• Abstraction is one of the four fundamental concepts of object-oriented programming.
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Q7. What is java features
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Java features include platform independence, object-oriented programming, and automatic memory management.
• Platform independence allows Java code to run on any platform without recompilation.

• Object-oriented programming allows for modular and reusable code.

• Automatic memory management frees developers from managing memory allocation and deallocation.

• Other features include exception handling, multithreading, and security.

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Q8. What is default package
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Default package is a package that does not have any name.
• Default package is also known as unnamed package.

• Classes in default package can be accessed from other classes in the same package but not from other packages.

• It is not recommended to use default package in production code.

• Example: package myPackage; // named package, package // default package
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