Carwale Interview Questions, Process, and Tips

2 hours coding round, only 1 person out of 90 cleared

Q1. Asked loads of dsa, super technical questions
Add your answer

Q1. Experience and field Knowledge
Add your answer
Q2. Roles and responsibilities
Add your answer

4 dsa questions were asked in online coding round.

DSA question asked in the coding test.

There were 4 questions, CoderByte was the platform used.

1st: Hard: Array: Search GFG for "Maximum size rectangle binary sub-array with all 1s"

2nd: Medium: Search: Longest Palindrome Substring

3rd: Easy: String: Search LEET for "Largest Substring between two equal characters." There was one more condition - the substring should have unique characters.

4th: Easy: String: Given a string, of characters, If "M" is encountered, remove "M" and duplicate the last small case letter. If "N" is encountered, remove "N" and discard the next character.

Q1. This round was supposed to be based on DSA. What is Time Complexity? Give examples.
Add your answer
Q2. What will be the time complexity to add an element to the Singly Linked List? Note* there are 2 types to add an element: 1st: to add at the end using Tail pointer so O(1) 2nd: to add anywhere in the middle...read more
Ans. 
Time complexity to add an element to a Singly Linked List is O(1) if added at the end using Tail pointer, and O(n) if added anywhere in the middle.
• Adding an element at the end of a Singly Linked List using the Tail pointer is a constant time operation, hence O(1).

• Adding an element anywhere in the middle of a Singly Linked List requires traversing the list to find the insertion point, resulting in a time complexity of O...read more
Answered by AI
Add your answer
Q3. Given an array of numbers, find the smallest Prime Number. I had to write down the whole code.
Add your answer

Q1. This round was supposed to be System Designs. Asked me about my Web Projects. I Implemented roles. So, how did manage my DB side? How did I give access to certain roles? How to optimize my DB? If I were ...read more
Add your answer
Q2. Database Designs. They asked me to draw some schema from my project, related to the above questions. Optimize it. They asked me what are Indexes. Query to be returned in O(n). So how will you do this?
Add your answer
Q3. React What's the difference between using NextJs and ReactJs? Routing in NextJs. VDOM? Event Listeners. Some Hooks in NextJs.
Ans. 
NextJs is a framework built on top of ReactJs, providing server-side rendering and other features for easier development.
• NextJs is a framework built on top of ReactJs, providing server-side rendering, routing, and other features for easier development.

• ReactJs is a JavaScript library for building user interfaces, while NextJs is a framework that adds functionality like server-side rendering and routing to React applicat...read more
Answered by AI
Add your answer
Q4. JSON How to optimize JSON? Wrote a Py code to convert optimized JSON into normal JSON. An alternative method of storing JSON data in another DS
Ans. 
Optimizing JSON involves minimizing redundant data, using efficient data structures, and compressing data when necessary.
• Minimize redundant data by using references or IDs instead of repeating the same information multiple times.

• Use efficient data structures like arrays or dictionaries to store JSON data in a more organized and accessible way.

• Compress JSON data using techniques like gzip or deflate to reduce file size ...read more
Answered by AI
Add your answer

Q1. Tell me about yourself.
Add your answer
Q2. Technical Qualities. Professional Qualities.
Add your answer
Q3. Some negative points about it
Add your answer
Q4. Personal and Family Background.
Add your answer
Q5. Academic history. Achievements and Lows during Primary and Secondary school.
Add your answer
Q6. Plan for Higher studies. I said Yes. It is generally said to tell NO even if you have plans. But considering my prior responses they selected me.
Add your answer
Q7. Commuting to work by train?
Ans. 
Yes, I prefer commuting to work by train for its reliability and eco-friendliness.
• I find commuting by train to be more reliable than other modes of transportation, as it is not affected by traffic congestion.

• Taking the train is also more eco-friendly compared to driving a car, as it reduces carbon emissions.

• Commuting by train allows me to relax, read, or work during the journey, making it a productive use of time.
Answered by AI
Add your answer

4 coding questions. 1 easy, 2 medium, 1 hard.Try to solve 3 out of them.

Q1. DSA based interview round.
Add your answer
Q2. Simple array and stack related questions were asked.
Add your answer

Q1. Detailed questions based on your projects,
Add your answer
Q2. Questions related to MERN as I have done a MERN project in past.
Add your answer

4 questions :- 3 were string based and one DP
1. characters and it's frequency were given in key value format in a string, print the total frequency of each character in lexicographical order.
2. Minimum Jump to reach end of the array(search Jump game from leetcode)
3. Partion the given string into 2 parts such that both parts are present in list of words provided. Print all the ways of partitioning.

Q1. 1.Find next greater element for each element in the given array of integers
Ans. 
Use stack to find next greater element for each element in the array
• Create an empty stack to store indices of elements

• Iterate through the array and for each element, pop elements from stack until finding a greater element

• Store the next greater element in a result array
Answered by AI
Add your answer
Q2. 2.In an array, find triplets such that their sum is 0.
Ans. 
Use three pointers to find triplets with sum 0 in an array.
• Sort the array first to easily find triplets.

• Use three pointers - one fixed, one moving from left, one moving from right.

• Check if the sum of the three pointers is 0, if not adjust pointers accordingly.
Answered by AI
Add your answer

Q1. Questions regarding projects and system design questions.
Add your answer

Q1. Family background, questions about project, work preferences etc
Add your answer