Student Life Engineering Student Interview Questions and Answers

Easy leetcode code 2 questions , HTML5 css javascript simple screen design

Q1. Oop, Simple coding javascript, react basic, sql basic
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Round duration - 70 minutes
Round difficulty - Easy

We're provided with 60 minutes.
We're provided with desktop as it was online test.

Q1. 
Leap Year Checker
Determine if a given year, represented as an integer 'N', is a leap year.
A leap year is defined as a year with 366 days, unlike a normal year which has 365 days.
Input:
The initial i...read more
Ans. 
The task is to determine if a given year is a leap year or not.
• Check if the year is divisible by 4, if yes then proceed to next step

• If the year is divisible by 100, then it should also be divisible by 400 to be a leap year

• If the year satisfies both conditions, output 'Yes', else output 'No'
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Round duration - 25 minutes
Round difficulty - Easy

They basically ask questions related to operating system

Round duration - 15 minutes
Round difficulty - Easy

There were 2 interviewers who talked to me and ask different questions regarding my company, my experience in college etc.
It was kind of chit chat but basically they were testing my conversation skills.

Q1. Question on Binary trees: if symmetric, easy string question using hashmap
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Q2. If we are hosting a live test how to show real time ranking, HLD for this and what algorithms can we use
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Q1. Database schema design for a feature where user can be free, gold, platinum.
Ans. 
Use a user table with a column for user type (free, gold, platinum)
• Create a user table with columns for user ID, name, email, user type

• Use a separate table for user types with columns for type ID and type name

• Establish a one-to-many relationship between user and user type tables

• Example: user table - user_id, name, email, type_id; user_type table - type_id, type_name
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Q1. HLD for live rank dashboard for a live test where millions of users are doing test
Ans. 
High-level design for a live rank dashboard for a live test with millions of users.
• Use a scalable architecture to handle millions of users concurrently.

• Implement real-time data processing to update ranks dynamically.

• Utilize caching mechanisms to improve performance and reduce load on the database.

• Design a user-friendly interface with intuitive data visualization.

• Include features for filtering, sorting, and searching to
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Round duration - 120 minutes
Round difficulty - Easy

It was a mix of mathematical aptitude, logical ability, and puzzles along with 2 programming questions of easy and medium level. Time was enough and no sectional time was present. 1-2 MCQs on SQL were also present.

This round was immediately followed by an SHL aptitude test which was basically a quick limited time check of your verbal ability and math because many questions were to be done in 1 hour.

Q1. 
Boolean Matrix Transformation Challenge
Given a 2-dimensional boolean matrix mat of size N x M, your task is to modify the matrix such that if any element is 1, set its entire row and column to 1. Specifi...read more
Ans. 
Modify a boolean matrix such that if any element is 1, set its entire row and column to 1.
• Iterate through the matrix and mark rows and columns to be modified

• Use additional arrays to keep track of rows and columns to be modified

• Update the matrix in-place based on the marked rows and columns
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Round duration - 60 minutes
Round difficulty - Easy

It was an online video interview round on HackerEarth with simultaneous code option. It was mostly justifying your resume in the first 15 minutes. After that OOPS was majorly asked. Basics of programming including questions on STL were asked. A class which required inheritance was asked by the interviewer to write. I was helped by the interviewer if i got stuck somewhere, Some questions on implementation of hashmaps and priority queues were also asked. A puzzle was asked which luckily struct to me at that moment.

Coding test around front end using react