QualMinds Data Engineer Interview Questions and Answers

Python, Pyspark, Scala, Kafka

Q1. CTE Expectation
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Q1. Difference betweenList Vs tupple
Ans. 
List is mutable and can be changed, while tuple is immutable and cannot be changed.
• List can be modified using methods like append, remove, and pop.

• Tuple elements cannot be changed once assigned.

• Lists are denoted by square brackets [], while tuples are denoted by parentheses ().
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Q2. What is decorator?
Ans. 
A decorator is a design pattern in object-oriented programming that allows behavior to be added to individual objects, either statically or dynamically, without affecting the behavior of other objects.
• Decorators are used to modify the behavior of functions or classes without changing their source code.

• They are often used for adding functionalities like logging, caching, or authentication to existing code.

• In Python, dec...read more
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Q1. What is jdk, string related questions, basic java oops questions?
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First round is apti when in placement

Too hard all are dsa questions

Python question was there and it was average level not tough

Simple coding questions which was good to go

Q1. General ops concepts
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Q1. Coding with technical questions
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Q1. General questions
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There are Question based on data strcuture ,they cover all the topic in ds

In coding code they gave internet access to solve the problem after 30 they told us to make some changes in it and we should ready to explain the entire code

Test consist of 25 Apatitude Question and 10 Coding problems of Debugging code, Find Output, Set Matrixs, Valid Matrix, Height of N-ary Tree, Sorting, Linked List etc. So prepare well with standard dsa problems of any sheet (striver sheet)

Q1. Technical Round consist of one coding question and detailed discussion on my smart india hackathon project and counter question on it with some of question on performance and security.
Ans. Performance Technique in React/Node ReactJS Interview Question
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Q2. Find 2nd Largest Element in array
Ans. 
Iterate through array to find 2nd largest element
• Iterate through array and keep track of largest and second largest elements

• Handle edge cases like empty array or array with less than 2 elements

• Example: ['3', '5', '2', '7', '1'] should return '5'
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Q3. Question on Redux also asked to pass information in reactjs.
Ans. Before interview refer redux documentation and standard interview question.
Answered by Dharmesh Vala
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Q4. Authentication and Authorization question on my project
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Q5. Security issues in your project
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