Carelon Global Solutions Lead Java Developer Interview Questions and Answers

Q1. Java concepts based on streams and oops concepts and singleton class
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Q2. DSA questions like first missing number and rotate array
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Q1. SQL queries based on group by and implementation of min heap
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Q2. Scenario based question like what data structure are used
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Q1. Java based questions like difference between interface and abstract class and spring boot rest API implementation
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Q2. Permutation of the number without duplicates
Ans. 
Generate all permutations of a given number without duplicates
• Use backtracking to generate all possible permutations

• Avoid duplicates by keeping track of used digits

• Recursively swap digits to generate permutations
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Q1. Min stack write code with full operation
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A min stack is a stack data structure that supports the usual push and pop operations, along with an additional operation to retrieve the minimum element in constant time.
• Create a stack to store the elements and another stack to store the minimum values encountered so far.

• When pushing an element, check if it is smaller than the current minimum. If so, push it onto the minimum stack.

• When popping an element, check if it ...read more
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Q2. Graph and sql ,concept problem
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Q1. Merge Sort based tricky ques
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Q2. Island problem leetcode
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Q1. How can a Spring Boot project be created to develop an API that returns specified data?
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Q2. What is the code to print a right-angled triangle of numbers based on a given input number?
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Q1. Collections framework, Explain why you chose a particular collection instead of other with example scenario based
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Q2. Explain your project
Ans. 
Developed a web application for online shopping with features like user authentication, product search, and order management.
• Implemented user authentication using Spring Security

• Utilized Hibernate for database operations

• Designed front-end using AngularJS for dynamic user interface
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Questions on permuation and combination

Q1. Java core and advanced concepts
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Q2. Springboot annotations, spring mvc, spring security
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Q1. Friendly questions
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Java Coding Questions based on ArrayList, HashMap, etc.

Count distinct elements in given String.

Q1. Current Project architecture.
Ans. 
Our current project architecture follows a microservices design pattern with separate services for different functionalities.
• Microservices architecture with separate services for different functionalities

• Use of RESTful APIs for communication between services

• Containerization using Docker for easy deployment and scalability

• Implementation of service discovery and load balancing with tools like Kubernetes

• Use of message bro
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Q2. My role in project
Ans. 
My role in the project was to develop and maintain Java applications to meet the project requirements.
• Developing Java applications based on project requirements

• Maintaining and updating existing Java code

• Collaborating with team members to ensure project success
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Q1. When will you start a company
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Q2. How Many location in company
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Q3. Who is the CEO of Zoho
Ans. 
Sir.Sridhar Vembu is the founder and CEO
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Q4. What is the high salary of Zoho
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Q5. Is Zoho a foreign company?
Ans. 
Yes, Zoho is a foreign company based in India.
• Zoho is headquartered in Chennai, India.

• It was founded by Sridhar Vembu in 1996.

• Zoho has offices in multiple countries including the United States, China, Japan, and Singapore.
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Ages, trains, profit losss, hcf lcm, clock, simple interest 30 min

Array string sorting algorithm