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Lido Learning Software Developer Intern Interview Questions, Process, and Tips

Updated 16 Sep 2021

Top Lido Learning Software Developer Intern Interview Questions and Answers

  • Q1. Merge Overlapping Intervals Problem Statement Given a specified number of intervals, where each interval is represented by two integers denoting its boundaries, the task ...read more
  • Q2. Problem: Permutations of a String Given a string STR consisting of lowercase English letters, your task is to return all permutations of the given string in lexicographi ...read more
  • Q3. Rat in a Maze Problem Statement You need to determine all possible paths for a rat starting at position (0, 0) in a square maze to reach its destination at (N-1, N-1). T ...read more

Lido Learning Software Developer Intern Interview Experiences

3 interviews found

I appeared for an interview in Feb 2021.

Round 1 - Coding Test 

(3 Questions)

Round duration - 70 Minutes
Round difficulty - Medium

Timing was 9:15AM. Platform was not very good. Questions were not well explained.

  • Q1. 

    Merge Overlapping Intervals Problem Statement

    Given a specified number of intervals, where each interval is represented by two integers denoting its boundaries, the task is to merge all overlapping interv...

  • Ans. 

    Merge overlapping intervals and return sorted list of merged intervals.

    • Identify overlapping intervals based on start and end times

    • Merge overlapping intervals to form new intervals

    • Sort the merged intervals in ascending order of start times

  • Answered by AI
  • Q2. 

    Rat in a Maze Problem Statement

    You need to determine all possible paths for a rat starting at position (0, 0) in a square maze to reach its destination at (N-1, N-1). The maze is represented as an N*N ma...

  • Ans. 

    Find all possible paths for a rat in a maze to reach its destination, given a matrix representation of the maze.

    • Use backtracking to explore all possible paths from the starting position to the destination.

    • Keep track of the current path and explore all possible directions at each step.

    • Terminate the exploration when reaching the destination or hitting a blocked cell.

    • Return the list of valid paths found, sorted in alphabe

  • Answered by AI
  • Q3. 

    Problem: Permutations of a String

    Given a string STR consisting of lowercase English letters, your task is to return all permutations of the given string in lexicographically increasing order.

    Explanatio...

  • Ans. 

    Return all permutations of a given string in lexicographically increasing order.

    • Generate all permutations of the given string using backtracking algorithm.

    • Sort the permutations lexicographically before printing them.

    • Ensure the string contains unique characters for correct output.

    • Handle multiple test cases efficiently.

    • Example: For input 'bca', output 'abc acb bac bca cab cba'.

  • Answered by AI

Interview Preparation Tips

Eligibility criteria8 CGPALido Learning interview preparation:Topics to prepare for the interview - OOPS, Data Structures, Core Java, Algorithms, PointersTime required to prepare for the interview - 2 MonthsInterview preparation tips for other job seekers

Tip 1 : Prepare maximum algorithms.
Tip 2 : Deep knowledge of data structure. 
Tip 3 : OOPS is must.

Application resume tips for other job seekers

Tip 1 : Keep it short.
Tip 2 : Mention only your own projects.

Final outcome of the interviewRejected

Skills evaluated in this interview

I appeared for an interview in Feb 2021.

Round 1 - Coding Test 

(2 Questions)

Round duration - 70 minutes
Round difficulty - Medium

Timing was 9:15AM. Platform was not very good. Questions were not well explained.

  • Q1. 

    Merge Overlapping Intervals Problem Statement

    Given a specified number of intervals, where each interval is represented by two integers denoting its boundaries, the task is to merge all overlapping interv...

  • Ans. 

    Merge overlapping intervals and return sorted list of merged intervals.

    • Identify overlapping intervals based on start and end times

    • Merge overlapping intervals to form new intervals

    • Sort the merged intervals in ascending order of start times

  • Answered by AI
  • Q2. 

    Rat in a Maze Problem Statement

    You need to determine all possible paths for a rat starting at position (0, 0) in a square maze to reach its destination at (N-1, N-1). The maze is represented as an N*N ma...

  • Ans. 

    Find all possible paths for a rat in a maze from source to destination.

    • Use backtracking to explore all possible paths in the maze.

    • Keep track of visited cells to avoid revisiting them.

    • Recursively try moving in all directions (up, down, left, right) until reaching the destination.

    • Return the valid paths as a list of strings sorted in alphabetical order.

  • Answered by AI

Interview Preparation Tips

Eligibility criteria8 CGPALido Learning interview preparation:Topics to prepare for the interview - OOPS, Data Structures, Core Java, Algorithms, PointersTime required to prepare for the interview - 2.5 monthsInterview preparation tips for other job seekers

Tip 1 : Prepare maximum algorithms.
Tip 2 : Deep knowledge of data structure.
Tip 3 : OOPS is must.

Application resume tips for other job seekers

Tip 1 : Keep it short.
Tip 2 : Mention only your own projects.

Final outcome of the interviewRejected

Skills evaluated in this interview

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I appeared for an interview in Dec 2020.

Round 1 - Assignment 

(1 Question)

Round duration - 120 minutes
Round difficulty - Easy

  • Q1. 

    Find All Pairs Adding Up to Target

    Given an array of integers ARR of length N and an integer Target, your task is to return all pairs of elements such that they add up to the Target.

    Input:

    The first line ...
  • Ans. 

    Given an array of integers and a target, find all pairs of elements that add up to the target.

    • Iterate through the array and for each element, check if the target minus the element exists in a hash set.

    • If it exists, add the pair to the result. If not, add the element to the hash set.

    • Handle cases where the same element is used twice in a pair.

    • Return (-1, -1) if no pair is found.

  • Answered by AI

Interview Preparation Tips

Professional and academic backgroundI completed Computer Science Engineering from Birla Institute of Technology, Mesra. Eligibility criterianoLido Learning interview preparation:Topics to prepare for the interview - Data structures, Big O Notation, Trees Sorting and search algorithms, HeapsTime required to prepare for the interview - 5 monthsInterview preparation tips for other job seekers

Tip 1 : Have projects on your resume.
Tip 2 : Good to have internships
Tip 3 : Practice a lot

Application resume tips for other job seekers

Tip 1 : Have good projects
Tip 2 : Have knowledge of everything you wrote

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview questions from similar companies

I applied via Company Website and was interviewed before Sep 2019. There were 5 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. Why should we hire you?
  • Q2. Why did you leave your last job?

Interview Preparation Tips

Interview preparation tips for other job seekers - My advice is just be honest and rest all will be fine.

I appeared for an interview before May 2021.

Round 1 - Video Call 

(2 Questions)

Round duration - 60 Minutes
Round difficulty - Easy

It was an coding round

  • Q1. 

    The Skyline Problem

    Compute the skyline of given rectangular buildings in a 2D city, eliminating hidden lines and forming the outer contour of the silhouette when viewed from a distance. Each building is ...

  • Ans. 

    Compute the skyline of given rectangular buildings in a 2D city, eliminating hidden lines and forming the outer contour of the silhouette.

    • Iterate through the buildings and create a list of critical points (x, y) where the height changes.

    • Sort the critical points based on x-coordinate and process them to form the skyline.

    • Merge consecutive horizontal segments of equal height into one to ensure no duplicates.

    • Return the fin...

  • Answered by AI
  • Q2. 

    Rat in a Maze Problem Statement

    You need to determine all possible paths for a rat starting at position (0, 0) in a square maze to reach its destination at (N-1, N-1). The maze is represented as an N*N ma...

  • Ans. 

    Find all possible paths for a rat in a maze from source to destination.

    • Use backtracking to explore all possible paths in the maze.

    • Keep track of visited cells to avoid revisiting them.

    • Recursively try moving in all directions (up, down, left, right) until reaching the destination.

    • Return a list of strings representing valid paths sorted in alphabetical order.

  • Answered by AI
Round 2 - HR 

Round duration - 30 Minutes
Round difficulty - Easy

It was an HR round with some general questions. it was just for formality.

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAupgrad interview preparation:Topics to prepare for the interview - Data Structures, Pointers, OOPS, System Design, Algorithms, Dynamic ProgrammingTime required to prepare for the interview - 3 MonthsInterview preparation tips for other job seekers

Tip 1 : Stay focused
Tip 2 : Practice coding questions.
Tip 3 : View previous interviews of the companies

Application resume tips for other job seekers

Tip 1 : Don't lie on resume
Tip 2 : Just write in format that is catchy

Final outcome of the interviewSelected

Skills evaluated in this interview

I applied via LinkedIn and was interviewed before May 2021. There were 2 interview rounds.

Round 1 - One-on-one 

(4 Questions)

  • Q1. Difference between var, let, const.
  • Ans. 

    var, let, and const are all used to declare variables in JavaScript, but they have different scoping rules and behaviors.

    • var has function scope and can be redeclared and reassigned

    • let has block scope and can be reassigned but not redeclared

    • const has block scope and cannot be reassigned or redeclared

    • Use const for values that won't change, let for values that will, and avoid var

  • Answered by AI
  • Q2. Explain CSS box model. Do padding and margin apply to inline elements?
  • Ans. 

    CSS box model defines the layout of elements on a webpage. Padding and margin can apply to block-level elements but not to inline elements.

    • CSS box model consists of content, padding, border, and margin around an element.

    • Padding adds space inside the border of an element.

    • Margin adds space outside the border of an element.

    • Padding and margin can apply to block-level elements like <div> but not to inline elements lik

  • Answered by AI
  • Q3. Difference between arrow functions and regular ones.
  • Ans. 

    Arrow functions are shorter syntax for writing function expressions.

    • Arrow functions do not have their own 'this' keyword.

    • Arrow functions cannot be used as constructors.

    • Arrow functions do not have the 'arguments' object.

    • Arrow functions are more concise and easier to read.

    • Regular functions are better for methods and constructors.

  • Answered by AI
  • Q4. How does JavaScript asynchronous model work
  • Ans. 

    JavaScript asynchronous model allows non-blocking code execution by using callbacks and promises.

    • JavaScript uses an event loop to handle asynchronous operations.

    • Callbacks are functions passed as arguments to other functions and executed when the operation is complete.

    • Promises are objects that represent the eventual completion or failure of an asynchronous operation.

    • Async/await is a newer syntax that allows writing asyn...

  • Answered by AI
Round 2 - Technical 

Interview Preparation Tips

Interview preparation tips for other job seekers - Be thorough in HTML DOM traversal concepts, CSS box model and vanilla Javascript fundamentals like closure,

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

Basic coding and MySQL queries. Like Types of join, having and where difference etc.

Round 2 - HR 

(1 Question)

  • Q1. Salary Discussion.
Interview experience
3
Average
Difficulty level
-
Process Duration
Less than 2 weeks
Result
No response

I applied via Walk-in and was interviewed in Jun 2024. There was 1 interview round.

Round 1 - Aptitude Test 

Python technical SQL basic

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-

I applied via Job Portal

Round 1 - Coding Test 

Medium to hard level DSA from leetcode

Round 2 - Coding Test 

Medium to hard level DSA from leetcode

Round 3 - HR 

(1 Question)

  • Q1. General HR questions.

Interview Preparation Tips

Interview preparation tips for other job seekers - Just be good at problem solving.
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Naukri.com and was interviewed before Oct 2023. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. Check if string is palindrome
  • Ans. 

    Check if a string is the same forwards and backwards

    • Iterate through the string from both ends and compare characters

    • Use built-in functions like reverse() to check for palindrome

    • Ignore spaces and punctuation when checking for palindrome

  • Answered by AI

Skills evaluated in this interview

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