VVDN Technologies Java Developer Interview Questions and Answers

The life cycle of fragments in Android refers to the stages of creation, addition, and removal of fragments in an activity.

• Fragments are created using the onCreateView() method

• They are added to an activity using the FragmentManager

• They can be removed using the FragmentTransaction

• The onDestroyView() method is called when a fragment is removed

• Fragments can be retained during configuration changes using setRetainInstance(...read more

I am a software developer with experience in various programming languages and frameworks.

• Proficient in Java, C++, and Python

• Familiar with web development using HTML, CSS, and JavaScript

• Experience with database management systems such as MySQL and MongoDB

• Strong problem-solving and analytical skills

• Worked on projects involving machine learning and artificial intelligence

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

• 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 in a subclass that is already defined in the su...read more

Switch case is used for multiple conditions while if else is used for binary conditions.

• Switch case is faster than if else for multiple conditions.

• If else can handle complex conditions while switch case cannot.

• Switch case can only compare values of the same data type.

• If else can handle null values while switch case cannot.

• Example: switch (day) { case 1: console.log('Monday'); break; case 2: console.log('Tuesday'); brea...read more

Inheritance is a fundamental OOP concept allowing a class to inherit properties and methods from another class.

• Promotes code reusability by allowing new classes to use existing code.

• Supports the creation of a hierarchical relationship between classes.

• Example: A 'Dog' class can inherit from an 'Animal' class, gaining its properties like 'eat' and 'sleep'.

• Facilitates polymorphism, enabling methods to be overridden in der...read more

Default case in switch case statement

• Default case is executed when no other case matches the switch expression

• It is optional and can be placed anywhere in the switch statement

• It is often used to handle unexpected input or errors

• It should always be the last case in the switch statement

Yes, I have received offers from two other companies.

• Received offers from Company A and Company B

• Currently evaluating all offers to make an informed decision

• Considering factors like company culture, growth opportunities, and compensation

I would like to join Google because of their innovative projects and work culture.

• Google is known for its cutting-edge technology and innovative projects.

• They have a strong focus on employee well-being and work-life balance.

• Google offers opportunities for career growth and development.

• The company has a diverse and inclusive work culture.

• Google is a leader in the tech industry with a global presence.

Yes, they are similar.

• All 8 metal balls are of the same material.

• They have the same size and weight.

• They have the same physical properties.

• They are interchangeable in any given situation.

I'm a passionate software developer with a strong background in full-stack development and a love for problem-solving.

• Over 5 years of experience in software development, specializing in JavaScript and Python.

• Worked on a project that improved application performance by 30% through code optimization.

• Collaborated with cross-functional teams to deliver high-quality software solutions on time.

• Contributed to open-source proj...read more

The missing rupee is not actually missing. The calculation is misleading and does not account for the total amount paid.

• The initial amount paid by each person was Rs.10, totaling Rs.30.

• The owner gave them a discount of Rs.5, so they paid Rs.25 in total.

• The broker took Rs.2, leaving them with Rs.23.

• When the broker returned Rs.1 to each person, they each received Rs.1 back, totaling Rs.3.

• So, the total amount paid by the ...read more