Carelon Global Solutions Team Developer Interview Questions and Answers

Q1. Started with introduction
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Q2. Asked about projects
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Q3. Asked Architecture related questions and design pattern related questions
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Q4. If you have 1 million requests how will you manage that
Ans. 
I would use load balancing, caching, and scaling techniques to manage the 1 million requests.
• Implement load balancing to distribute requests evenly across multiple servers.

• Utilize caching to store frequently accessed data and reduce response times.

• Scale horizontally by adding more servers to handle the increased load.

• Optimize code and database queries to improve performance.

• Monitor system performance and make adjustmen
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Q5. React vs SAP UI5
Ans. 
React is a popular JavaScript library for building user interfaces, while SAP UI5 is a framework for developing enterprise-ready web applications.
• React is more flexible and widely used in the industry.

• SAP UI5 is specifically designed for SAP applications and has built-in support for SAP technologies.

• React has a larger community and ecosystem with more resources and libraries available.

• SAP UI5 provides a consistent user...read more
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Q6. Node VS JAVA
Ans. 
Node.js is a runtime environment for executing JavaScript code outside of a browser, while Java is a general-purpose programming language often used for building enterprise applications.
• Node.js is single-threaded and event-driven, making it ideal for handling asynchronous operations like I/O operations.

• Java is a statically typed language with a strong emphasis on object-oriented programming, making it suitable for larg...read more
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Q7. Multitenancy in sap btp
Ans. 
Multitenancy in SAP BTP allows multiple customers to share the same application instance while keeping their data isolated.
• Multitenancy allows multiple customers (tenants) to use the same application instance.

• Each tenant's data is isolated and secure from other tenants.

• Tenants can customize their own settings, branding, and configurations within the shared application.

• SAP BTP provides tools and features to manage multi...read more
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Arrays and strings - 90 mins

Create Modules, railway reservation system - 60 mins

Q1. Difference between hashmap and hasptable
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Q2. Why typescript over javascript
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Q3. Find the percentage of increace in the quantity of item after making it price 20% extra
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Q4. What is normalization
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Q5. Date and time api available
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30min duration simple questions

Basic array 2 coding questions

Q1. Introduce yorself
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Q2. Explain about final year project
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Q3. Github link for project
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Q4. What is oops in java
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Q5. What is polymorphism explain with examples
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It was an amazing interview.

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Basic DSA from the hacker rank website

Q1. Basic to medium questions on javascript, nodejs, MySQL joints, html5 tags
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Q1. Real life problems, Use cases
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Q1. Difference between hashset and hashtable
Ans. 
HashSet is an unordered collection of unique elements, while Hashtable is a synchronized collection of key/value pairs.
• HashSet does not allow duplicate elements, while Hashtable does not allow duplicate keys.

• HashSet does not maintain insertion order, while Hashtable does not guarantee any order.

• HashSet allows null values, while Hashtable does not allow null keys or values.
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Q2. Collection vs Collections
Ans. 
Collection is an interface in Java that represents a group of objects, while Collections is a utility class that contains static methods for operating on collections.
• Collection is an interface in Java that represents a group of objects.

• Collections is a utility class in Java that contains static methods for operating on collections.

• Example: List list = new ArrayList<>(); Collection collection = list;

• Example: Collections
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Q1. SQL query related questions
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Q2. Write a Java program to find the duplicate in Array
Ans. 
Java program to find duplicates in an array of strings
• Create a HashSet to store unique elements

• Iterate through the array and check if element is already in the HashSet

• If element is already in the HashSet, it is a duplicate
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LeetCode , hard questions on dynamic programming, graphs, and more.

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Q1. Is relocation a possibility for this position?
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Q2. Senior role is there
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Q1. What are the key concepts of Object-Oriented Programming (OOP)?
Ans. 
Key concepts of OOP include encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (object).

• Inheritance: Allowing a class to inherit properties and behavior from another class.

• Polymorphism: Objects of different classes can be treated as objects of a common superclass.

• Abstraction: Hiding complex implementation details and showing onl
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Q2. What is the internal working mechanism of a HashMap?
Ans. 
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where the pair will be stored.

• If multiple keys hash to the same index (collision), a linked list is used to store these pairs.

• To retrieve a value, t...read more
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