Reckitt Benckiser Java Developer Interview Questions and Answers

Q1. Basic questions on utilities and management
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Q1. What is a class, does Java use pointers
Ans. 
A class is a blueprint for creating objects in Java. Java uses references instead of pointers.
• A class is a user-defined data type that encapsulates data and methods

• Java uses the 'new' keyword to create objects from a class

• References in Java point to objects in memory, but Java does not have direct access to memory addresses like pointers in C/C++
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Q2. Java oops concepts , explain inheritance concepts
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Inheritance is a mechanism in Java OOPs where a new class is derived from an existing class.
• Inheritance allows the new class to inherit the properties and methods of the existing class.

• The existing class is called the superclass or parent class, while the new class is called the subclass or child class.

• The subclass can add new properties and methods, or override the existing ones.

• The keyword 'extends' is used to create...read more
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Q3. Strings in Java, write string reverse program
Ans. 
Program to reverse a string in Java
• Create a StringBuilder object with the given string

• Use the reverse() method of StringBuilder to reverse the string

• Convert the StringBuilder object back to string using toString() method
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Q1. Any one mongo db Java script
Ans. 
MongoDB JavaScript query to find documents with a specific field value
• Use the find() method to query the collection

• Pass in a query object with the field and value to search for

• Example: db.collection.find({field: value})
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Q2. GitHub Java script mongo db node.js
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Q1. What are interfaces in golang, implement it with an example
Ans. 
Interfaces in Golang define a set of methods that a type must implement
• Interfaces in Golang are a way to achieve polymorphism

• They allow different types to be treated as the same type if they implement the same set of methods

• Example: defining an interface 'Shape' with methods like 'Area()' and 'Perimeter()', and implementing it for types like 'Circle' and 'Rectangle'
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Some basic coding questions from leetcode

Q1. What percentage of success rate did you bring to the project
Ans. 
I brought a 95% success rate to the project by effectively implementing agile methodologies and conducting thorough testing.
• Implemented agile methodologies to ensure efficient project management

• Conducted thorough testing to identify and resolve bugs early on

• Collaborated closely with team members to address any issues promptly
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Q2. Define CORS and its usage
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CORS stands for Cross-Origin Resource Sharing, a mechanism that allows resources on a web page to be requested from another domain.
• CORS is used to enable secure cross-origin requests in web browsers.

• It allows servers to specify who can access their resources.

• CORS is implemented using HTTP headers like Access-Control-Allow-Origin.

• Example: If a website on domain A wants to make a request to a server on domain B, CORS all...read more
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Q1. What are your salary expectations?
Ans. 
My salary expectations are in line with industry standards and based on my experience and skills.
• Research average salaries for Software Developers in the area

• Consider my years of experience and relevant skills

• Be open to negotiation based on benefits package
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Q2. Are you willing to re-locate?
Ans. 
Yes, I am open to relocating for the right opportunity.
• I am open to relocating for the right job opportunity

• I am willing to move to a new location if necessary

• I am flexible with regards to location for the right role
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Q1. Describe yourself
Ans. 
I am a passionate software developer with a strong background in full-stack development and a love for problem-solving.
• Proficient in languages like JavaScript, Python, and Java; developed a full-stack application for a local business.

• Experience with frameworks such as React and Node.js; built a responsive web app that improved user engagement by 30%.

• Strong understanding of database management; optimized SQL queries tha...read more
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Q2. Tell me yourself
Ans. 
I'm a passionate software developer with a strong background in full-stack development and a love for problem-solving.
• Education: Bachelor's degree in Computer Science from XYZ University.

• Experience: 3 years of experience in developing web applications using React and Node.js.

• Projects: Developed an e-commerce platform that increased sales by 30% within the first quarter.

• Skills: Proficient in JavaScript, Python, and SQL,...read more
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Q1. Questions GST concepts
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Q2. Checking Excel Skills
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Q1. Asking personal Detaiuls
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Q1. About your self
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