KredX Software Developer Interview Questions and Answers

Q1. What is Vector? How it is different from arrays?
Ans. 
Vector is a dynamic array that can resize itself. It differs from arrays in its ability to change size during runtime.
• Vectors are implemented as dynamic arrays, whereas arrays are static.

• Vectors can resize themselves during runtime, whereas arrays have a fixed size.

• Vectors can be used to store objects of any type, whereas arrays can only store objects of a specific type.

• Vectors have built-in functions for easy manipula
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Q2. What is an abstract class?
Ans. 
An abstract class is a class that cannot be instantiated and is used as a base class for other classes.
• An abstract class can have abstract and non-abstract methods.

• Abstract methods are declared but not implemented in the abstract class.

• A non-abstract class that inherits from an abstract class must implement all abstract methods.

• An abstract class can have constructors and fields like a regular class.

• An abstract class ca...read more
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The aptitude round consists of approx 20 q's, out of which half the q's were based on LR and aptitude and half based on computer fundamentals.

The coding test consisted of 4 q's. The selection criteria was to complete at least 3 q's.

Q1. Tell me something about yourself
Ans. 
I am a passionate software engineer with experience in developing web applications using various technologies.
• Experienced in developing web applications using HTML, CSS, JavaScript, and frameworks like React and Angular

• Proficient in backend development with Node.js and databases like MongoDB and MySQL

• Familiar with version control systems like Git and project management tools like Jira
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Q2. Questions on React.js, as i had build projects using react.js.
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Consisted of basic dsa questions and time complexity questions

4 dsa questions to be solved in one hour

2 Codes on Hackerrank

Q1. Questions on Tree
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Q2. Questions on Java
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Q1. Hiring Manager Round
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Q1. Regarding the experience and project work
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DSA medium level questions regarding stack, queue , arrays

Q1. DSA Medium and Low Level
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Q1. It was one-on-one round with the CTO. They judged me on my technical knowledge as well as understanding of tech-era.
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Q2. I was asked question related to the languages and tech-stacks I mentioned in my resume and also question related to OOPs concepts.
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Q1. Tell me about yourself.
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30 minutes Aptitude test

1 Hour 30 minutes on SQL screening test