Unschool Learning Intern Interview Questions and Answers

Medium level coding question

Q1. Intreview round asked about project mentioned in CV
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Q2. Basic of reacts, opps question,sql queries
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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...read more
Ans. Brute Force
1. We are given the function MERGEINTERVALS(), which takes a 2D vector representing the vector of intervals and returns another 2D vector which is the vector of merged intervals.
2. We create another function ISOVERLAP() to check if the current interval overlaps with the other interval.
3. Now we create an empty 2D vector “RES” to store finally merged intervals and another boolean vector “VIS” to mark if the current in...read more
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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...read more
Ans. Bactracking
Approach: We can start the traversal of the paths from the rat’s starting position, i.e. (0,0) keeping track of the visited cells during the traversal. We will recursively go through all the paths possible until the last index of the grid (destination) is reached, and add the path information using which the rat successfully reached the end.
 
Algorithm is as follows:
 
1. Take the starting position of th...read more
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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...read more
Ans. Backtracking
The idea is to fix a character at a position and then find the permutations for rest of the characters.
Make a list ‘ans’ which will contain the permutations of the given string.
 
Algorithm:
Let’s define a function generatePermutaionsHelper(Str, l, r). This function generates the permutations of the substring which starts from index  ‘l’ and ends at index  ‘r’.
• Call the function: generatePermutai...read more
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Q1. I got refral from a friend so i was directly interviewed
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Q2. What have you done in react js ?
Ans. 
I have developed multiple single-page applications using React JS.
• Created reusable components to improve code reusability

• Implemented state management using Redux for better data flow

• Utilized React Router for navigation between different pages

• Integrated APIs to fetch and display data dynamically
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Q3. What is javascript
Ans. 
JavaScript is a programming language commonly used for creating interactive effects within web browsers.
• JavaScript is a high-level, interpreted programming language.

• It is used to make web pages interactive and dynamic.

• JavaScript can be used for client-side and server-side development.

• Commonly used frameworks/libraries include React, Angular, and Node.js.
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Q4. Showyour projects
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Q5. What loibraries you used
Ans. 
I have used a variety of libraries in my projects, including React, Redux, Axios, and Material-UI.
• React

• Redux

• Axios

• Material-UI
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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...read more
Ans. Brute Force
1. We are given the function MERGEINTERVALS(), which takes a 2D vector representing the vector of intervals and returns another 2D vector which is the vector of merged intervals.
2. We create another function ISOVERLAP() to check if the current interval overlaps with the other interval.
3. Now we create an empty 2D vector “RES” to store finally merged intervals and another boolean vector “VIS” to mark if the current in...read more
Answered Anonymously
Add your answer
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...read more
Ans. Bactracking
Approach: We can start the traversal of the paths from the rat’s starting position, i.e. (0,0) keeping track of the visited cells during the traversal. We will recursively go through all the paths possible until the last index of the grid (destination) is reached, and add the path information using which the rat successfully reached the end.
 
Algorithm is as follows:
 
1. Take the starting position of th...read more
Answered Anonymously
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It is good nice and not so tough

Q1. Tell me about yourself inro ?
Ans. 
I am a data-driven individual with a strong analytical mindset and a passion for problem-solving.
• Graduate student majoring in Data Science at XYZ University

• Proficient in programming languages such as Python, R, and SQL

• Experience with data visualization tools like Tableau and Power BI

• Completed projects involving data cleaning, analysis, and interpretation

• Strong communication skills and ability to work in a team environm
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