Calix Software Engineer Interview Questions and Answers

Q1. Sql related questions were asked
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Q2. Manual testing questions were asked
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Q3. Joins questions
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Q4. Where clause questions
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Q5. Manual testing questions
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It was a Basic Aptitude Test

We were asked to do Sorting, SQL queries (join)

Q1. Can you tell me about yourself?
Ans. 
I am a passionate software engineer with 5 years of experience in developing web applications using various technologies.
• 5 years of experience in software development

• Proficient in developing web applications

• Skilled in using various technologies such as Java, JavaScript, and SQL
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Q1. Sorting of an array
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Q2. Bubble sorting algorithm
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Q1. Java oops question
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Q1. API questions related to put and patch api
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Q1. What is the design pattern? Singleton Design patter
Ans. 
Singleton design pattern ensures a class has only one instance and provides a global point of access to it.
• Used when only one instance of a class is needed throughout the system

• Provides a global access point to the instance

• Implemented by creating a static method to return the same instance each time it is called
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Q2. Difference Hashmap and Concurrent Hashmap
Ans. 
HashMap is not thread-safe, while ConcurrentHashMap allows multiple threads to read and write concurrently.
• HashMap is not synchronized and not thread-safe, while ConcurrentHashMap is synchronized and thread-safe.

• ConcurrentHashMap allows multiple threads to read and write concurrently without any external synchronization, while HashMap requires external synchronization for concurrent access.

• ConcurrentHashMap achieves hi...read more
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Q3. Collection Framework
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Q4. Difference between list , set
Ans. 
List is an ordered collection of elements with duplicates allowed, while set is an unordered collection of unique elements.
• List maintains the order of elements, while set does not guarantee any specific order.

• List allows duplicate elements, while set does not allow duplicates.

• Example: List - [1, 2, 3, 1], Set - {1, 2, 3}
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Create an API using Notepad to check if a string is a palindrome or not.

Q1. Solid principal
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Know your resume and your basics

Know class diagrams. Very Huge for workday.

Q1. Find the index of second maximum interger in a given array.
Ans. 
Find the index of second maximum integer in a given array.
• Iterate through the array to find the maximum integer.

• Then iterate again to find the second maximum integer and return its index.
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Q1. Basic technical question oops concept
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