CMS Computers Limited (INDIA) Java Developer Interview Questions and Answers for Experienced

I am good coder in java coding knowledge.

Q1. I am best technicaly in java .
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Q2. Base on java like core java .
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Q1. Difference between ArrayList and LinkedList?
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Q2. Difference between HashMap and HashTable?
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Q1. Count duplicate from int array
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Q1. Java 8 features
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Q2. Junit code writing
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Q1. Reason for job change
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Q2. Past experience
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I have over 5 years of experience in Java development, focusing on building scalable applications and optimizing performance.
• Developed a microservices architecture for an e-commerce platform, improving scalability and maintainability.

• Implemented RESTful APIs using Spring Boot, enhancing integration with third-party services.

• Led a team of 4 developers in migrating legacy systems to Java 11, resulting in a 30% performanc...read more
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Coding round 1 code java 2 code sql

Q1. Microservices communication
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Q2. Hash map working
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Q1. Java 8 feature & java 9
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Q2. Profiler concept internal work
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Separate 0 and 1 and then store in the sme array

Q1. Given an array of non-negative integers.Find the length of the longest subsequence such that elements in the subsequence are contiguous integers. The consecutive numbers can be in any order. Example n=7 nu...read more
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Find the length of the longest subsequence of contiguous integers in an array.
• Sort the array

• Iterate through the array and check for consecutive integers

• Keep track of the longest subsequence found
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Q2. Get list of pincodes from these objects Employee{ id Long, name String, Addresses : List
} Addresses{ houseNo long, pindcode long, state String, country String, } Ans. Use flatMap to flatten and then use m...read more
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Q3. What is Database Pooling, Hikari and its configurations. Java 8 to current enchancements and current java version Factory and Builder design patterns to explain and code Project expalantion and details, Cr...read more
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Database pooling is a technique used to manage a pool of database connections for efficient resource utilization. HikariCP is a popular database connection pooling library in Java.
• HikariCP is a high-performance database connection pooling library for Java applications.

• It is known for its low latency and high throughput.

• Configurations for HikariCP include settings such as maximum pool size, connection timeout, and idle ...read more
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