Visa SDE Interview Questions and Answers

Very easy online coding round

Q1. E mail classifier using ML
Ans. 
Email classifier using ML
• Use supervised learning algorithms like Naive Bayes or Support Vector Machines

• Preprocess email data by tokenizing, removing stop words, and stemming

• Split data into training and testing sets for model evaluation

• Evaluate model performance using metrics like accuracy, precision, recall, and F1 score
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Q2. What do you think about chatgot
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Easy questions tbh and the interviewer was chill

Q1. Binary search to find the number of coins
Ans. 
Binary search can be used to efficiently find the number of coins in a sorted array.
• Start by setting low to 0 and high to the length of the array minus 1.

• While low is less than or equal to high, calculate the mid point.

• Compare the value at the mid point with the target number of coins and adjust low or high accordingly.

• Return the index of the target number of coins if found, otherwise return -1.
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Q2. Oops questions that too basic questions
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ALL APTI,QUANT,TECH MCQs were there

2 easy questions were given in it

Q1. Different scopes of a bean
Ans. 
The different scopes of a bean in software development.
• Singleton: A single instance of the bean is created and shared across the application.

• Prototype: A new instance of the bean is created every time it is requested.

• Request: A new instance of the bean is created for each HTTP request.

• Session: A new instance of the bean is created for each user session.

• Global session: A new instance of the bean is created for each glob
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Q1. Design a SQL Database
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Asked me to rewrite SQL in 20 minutes insanely tough and rude interviewer

Given 3 DSA medium level problems

One hour face to face round. Given system design problem of parking lot.

Q1. Description about project from resume
Ans. 
Developed a web application for online shopping
• Used HTML, CSS, and JavaScript for front-end development

• Implemented backend using Node.js and MongoDB

• Integrated payment gateway for secure transactions
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Q2. Lot of behavourial questions.
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It consist of 3 questions on hackerrank

Q1. Dont remember the exact it was related to array manipulation
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Q2. Dont remember the exact but it was string manipulation
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