VRIZE Software Engineer Interview Questions and Answers

Q1. What do u mean by data
Ans. 
Data refers to facts, statistics, or information collected for analysis or reference.
• Data is raw, unprocessed information.

• It can be in the form of numbers, text, images, or any other format.

• Examples include customer names, product prices, and sales figures.

• Data can be structured (organized in a specific way) or unstructured (not organized).
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Q2. What is preprocessed data
Ans. 
Preprocessed data is data that has been cleaned, transformed, and organized for analysis or modeling.
• Preprocessed data is often used in machine learning and data analysis to improve the accuracy and efficiency of models.

• Common preprocessing steps include removing missing values, scaling features, and encoding categorical variables.

• Examples of preprocessing techniques include normalization, standardization, one-hot enco
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Q3. What do u mean by info
Ans. 
Info refers to data or knowledge that provides details or context about a specific topic or subject.
• Info can be in the form of facts, statistics, or explanations.

• It helps to understand a topic better or make informed decisions.

• Examples of info include news articles, research papers, and educational resources.
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Q4. How to copy from 2 tables and paste in 3rd one in sql
Ans. 
Use SQL INSERT INTO SELECT statement to copy data from 2 tables and paste into a 3rd table.
• Use INSERT INTO SELECT statement to copy data from 2 tables and paste into a 3rd table.

• Specify the columns you want to copy from each table in the SELECT statement.

• Make sure the columns in the SELECT statement match the columns in the 3rd table where you are pasting the data.
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Q5. Reverse string using any language you know
Ans. 
Reverse a string using any programming language
• Use built-in functions like reverse() or slice() in languages like Python or JavaScript

• Iterate through the string in reverse order and append each character to a new string

• Use a stack data structure to push each character onto the stack and then pop them off to reverse the string
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Q6. A puzzle question was asked but i don't remeber it.
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Q1. Oops related questions
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Q2. C language quizzes
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Coding Rount
DSA Round + Puzzle
SQL + Project Discussion
JS

Level 1 aptitude with java, SQL, reasoning

Q1. Phone screen about previous experience
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Q1. Mobile app development basics
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Q1. Culture fit questions
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Coding exercise related to probability

Q1. Database design for ride hailing service like uber, ola
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Q2. Tech stack needed to build a real time application
Ans. 
Tech stack for real time applications includes WebSocket, Node.js, Redis, and MongoDB.
• Use WebSocket for real-time communication between client and server

• Node.js for server-side logic and handling multiple connections efficiently

• Redis for caching and storing real-time data

• MongoDB for persistent data storage and retrieval
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