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Groww Software Developer Intern Interview Questions and Answers
10 Interview questions
Best Time To Buy and Sell Stock Problem Statement
You are given an array 'PRICES' of 'N' integers, where 'PRICES[i]' represents the price of a certain stock on the i-th day. An integer 'K' is also provided...
Determine the maximum profit achievable with at most K transactions by buying and selling stocks.
Iterate through the array and keep track of the minimum price to buy and maximum profit for each transaction.
Use dynamic programming to store the maximum profit at each day with each possible number of transactions.
Consider edge cases such as when K is 0 or when the array is empty.
Example: For input N = 6, PRICES = [3,...
Stack with getMin Operation
Create a stack data structure that supports not only the usual push and pop operations but also getMin(), which retrieves the minimum element, all in O(1) time complexity withou...
Implement a stack with getMin operation in O(1) time complexity without using extra space.
Use two stacks - one to store the actual elements and another to store the minimum values encountered so far.
When pushing an element, check if it is smaller than the current minimum and if so, push it onto the minimum stack.
When popping an element, check if it is the current minimum and if so, pop from the minimum stack as we...
Cycle Detection in a Singly Linked List
Determine if a given singly linked list of integers forms a cycle or not.
A cycle in a linked list occurs when a node's next points back to a previous node in the l...
Detect if a singly linked list forms a cycle by checking if a node's next points back to a previous node.
Use Floyd's Tortoise and Hare algorithm to detect a cycle in the linked list.
Initialize two pointers, slow and fast, and move them at different speeds through the list.
If there is a cycle, the two pointers will eventually meet at some node.
If one of the pointers reaches the end of the list (null), there is no c...
Minimum Steps for a Knight to Reach Target
Given a square chessboard of size 'N x N', determine the minimum number of moves a Knight requires to reach a specified target position from its initial position.
...Calculate minimum steps for a Knight to reach target position on a chessboard.
Use BFS algorithm to find the shortest path from Knight's starting position to target position.
Consider all possible moves of the Knight on the chessboard.
Keep track of visited positions to avoid revisiting them.
Return the minimum number of moves required to reach the target position.
Right View of Binary Tree
Given a binary tree of integers, your task is to output the right view of the tree.
The right view of a binary tree includes the nodes that are visible when the tree is observed ...
The task is to output the right view of a binary tree, which includes the nodes visible when observed from the right.
Perform a level order traversal of the binary tree.
For each level, add the rightmost node to the result list.
Print the result list as the right view of the binary tree.
Handle null nodes by skipping them during traversal.
Problem Statement
Given an integer array ARR of size N, replace each element of this array with its corresponding rank.
Explanation
The rank of an element is an integer between 1 and N (inclusive) that r...
Replace elements in an array with their corresponding ranks based on given rules.
Iterate through the array and assign ranks based on the rules provided.
Handle equal elements by assigning them the same rank.
Return the modified array with elements replaced by their ranks.
Delete the Middle Node from a Singly Linked List
Given a singly linked list of integers, the task is to remove the middle node from this list.
Input:
The first line of input includes an integer 'T' which...
Remove the middle node from a singly linked list of integers.
Identify the middle node using slow and fast pointers technique.
Update the pointers to remove the middle node.
Handle cases where there are two middle nodes by removing the first one.
Return NULL if no middle node exists.
Achieve O(N) time and O(1) space complexity with a single traversal.
Left View of a Binary Tree Problem Statement
Given a binary tree, your task is to print the left view of the tree.
Example:
Input:
The input will be in level order form, with node values separated by a ...
Print the left view of a binary tree given in level order form.
Traverse the tree level by level and print the first node of each level
Use a queue to keep track of nodes at each level
Consider null nodes as well while traversing the tree
Word Break Problem Statement
You are provided with a continuous non-empty string (referred to as 'sentence') which contains no spaces and a dictionary comprising a list of non-empty strings (known as 'word...
Given a dictionary of words and a continuous string, generate all possible sentences by inserting spaces.
Use recursion to generate all possible combinations of words from the dictionary to form sentences.
Check if a substring of the sentence matches any word in the dictionary, if so, recursively call the function with the remaining substring.
Keep track of the current sentence being formed and add it to the result w...
Minimum and Maximum Candy Cost Problem
Ram is in Ninjaland, visiting a unique candy store offering 'N' candies each with different costs. The store has a special offer: for every candy you purchase, you ca...
Determine the minimum and maximum amounts of money needed to purchase all candies with a special offer.
Iterate through the candy costs array to find the minimum and maximum costs.
Consider the special offer of getting up to 'K' additional candies for free.
Calculate the minimum cost by selecting the cheapest candies and taking free ones.
Calculate the maximum cost by selecting the most expensive candies and taking fr...
Groww Software Developer Intern Interview Experiences
4 interviews found
Selected
I applied via Job Portal and was interviewed in Mar 2024. There was 1 interview round.
(4 Questions)
- Q1. Efwegfewgewgewgewg
- Q2. Ewgwegewgewgewgewg
- Q3. Ewgegwegewgewgewgewg
- Q4. Ewgewgkjewbgkjewbgkjewbgkjewbgk
I appeared for an interview in Apr 2021.
(1 Question)
Round duration - 60 Minutes
Round difficulty - Medium
Timing- In the evening around 5 pm
Environment- It was online test so I was in my room comfortable.
- Q1.
Best Time To Buy and Sell Stock Problem Statement
You are given an array 'PRICES' of 'N' integers, where 'PRICES[i]' represents the price of a certain stock on the i-th day. An integer 'K' is also provide...
- Ans.
Determine the maximum profit achievable with at most K transactions by buying and selling stocks.
Iterate through the array and keep track of the minimum price to buy and maximum profit for each transaction.
Use dynamic programming to store the maximum profit at each day with each possible number of transactions.
Consider edge cases such as when K is 0 or when the array is empty.
Example: For input N = 6, PRICES = [3, 2, 6...
(1 Question)
Round duration - 60 minutes
Round difficulty - Easy
Timing - 2pm
Environment - my room
Interviewer was pretty chilled.
- Q1.
Stack with getMin Operation
Create a stack data structure that supports not only the usual push and pop operations but also getMin(), which retrieves the minimum element, all in O(1) time complexity witho...
- Ans.
Implement a stack with getMin operation in O(1) time complexity without using extra space.
Use two stacks - one to store the actual elements and another to store the minimum values encountered so far.
When pushing an element, check if it is smaller than the current minimum and if so, push it onto the minimum stack.
When popping an element, check if it is the current minimum and if so, pop from the minimum stack as well.
Fo...
Interview Preparation Tips
Tip 1 : Be well prepared in DSA , including graphs,dp
Tip 2 : practice regularly one or two hours is enough but u need to be consistent for atleast a year or so
Tip 3 : prepare os dbms oops in last week of the interview
Tip 1 : at least Two projects
Tip 2 : Some experience in competitive programming will be beneficial.
Skills evaluated in this interview
I appeared for an interview in Oct 2020.
(2 Questions)
Round duration - 65 minutes
Round difficulty - Medium
It was 24 hours window for the online round from 8 Oct 10:30 am to 9 Oct 10:30 am. There were 7 MCQ problems related to c++, java, DBMS, and operating systems. And 2 coding problems with one easy and one moderate level difficulty for question, we were supposed to write the whole program but for other question, the function was to be written only. I was able to solve the first problem fully and the second 50%, you are required to pass test cases.
- Q1.
Minimum and Maximum Candy Cost Problem
Ram is in Ninjaland, visiting a unique candy store offering 'N' candies each with different costs. The store has a special offer: for every candy you purchase, you c...
- Ans.
Determine the minimum and maximum amounts of money needed to purchase all candies with a special offer.
Iterate through the candy costs array to find the minimum and maximum costs.
Consider the special offer of getting up to 'K' additional candies for free.
Calculate the minimum cost by selecting the cheapest candies and taking free ones.
Calculate the maximum cost by selecting the most expensive candies and taking free on...
- Q2.
Word Break Problem Statement
You are provided with a continuous non-empty string (referred to as 'sentence') which contains no spaces and a dictionary comprising a list of non-empty strings (known as 'wor...
- Ans.
Given a dictionary of words and a continuous string, generate all possible sentences by inserting spaces.
Use recursion to generate all possible combinations of words from the dictionary to form sentences.
Check if a substring of the sentence matches any word in the dictionary, if so, recursively call the function with the remaining substring.
Keep track of the current sentence being formed and add it to the result when t...
(3 Questions)
Round duration - 90 minutes
Round difficulty - Medium
The interviewer asked me questions about projects, general discussion, and 3 coding questions based on linked list, arrays, and binary tree.
I gave optimum approach for every question.
- Q1.
Delete the Middle Node from a Singly Linked List
Given a singly linked list of integers, the task is to remove the middle node from this list.
Input:
The first line of input includes an integer 'T' whic...
- Ans.
Remove the middle node from a singly linked list of integers.
Identify the middle node using slow and fast pointers technique.
Update the pointers to remove the middle node.
Handle cases where there are two middle nodes by removing the first one.
Return NULL if no middle node exists.
Achieve O(N) time and O(1) space complexity with a single traversal.
- Q2.
Problem Statement
Given an integer array
ARRof sizeN, replace each element of this array with its corresponding rank.Explanation
The rank of an element is an integer between 1 and
N(inclusive) that ... - Ans.
Replace elements in an array with their corresponding ranks based on given rules.
Iterate through the array and assign ranks based on the rules provided.
Handle equal elements by assigning them the same rank.
Return the modified array with elements replaced by their ranks.
- Q3.
Left View of a Binary Tree Problem Statement
Given a binary tree, your task is to print the left view of the tree.
Example:
Input:
The input will be in level order form, with node values separated by a...
- Ans.
Print the left view of a binary tree given in level order form.
Traverse the tree level by level and print the first node of each level
Use a queue to keep track of nodes at each level
Consider null nodes as well while traversing the tree
Interview Preparation Tips
Tip 1 : First Go through all the concepts of Data Structures and algorithms, I have taken Coding ninjas course c++ interview preparation.
Tip 2 : Try to solve all the problems by yourself then it will be meant for you, if you can't solve them after 30-45 minutes of time then see the solution of it, and for this, I used to consult TA and mentors on coding ninjas course.
Tip 3 : Have confidence in yourself, if you can't solve it initially, gradually you will be able to solve the problems. Hard work pays off.
Tip 4 : Note down the main information's about your project like what you have done in the project and what difficulties you have faced, it will be a great way to tackle questions about the project in the interview.
Tip 1 : Keep it simple and mention what you actually know and achieved.
Tip 2 : Mention your institute email-id if you have, it adds weight to the resume
Tip 3 : Use the "Built/created/made X using Y to achieve Z" format when writing about projects or work done.
Skills evaluated in this interview
I appeared for an interview in Oct 2020.
(2 Questions)
Round duration - 90 minutes
Round difficulty - Medium
A 24 hour window was given to us and we can attempt the test anytime in between. It included 2 coding questions. One was easy-medium level and the other one was hard. Along with this 7 debugging MCQ's were given, however they were easy.
- Q1.
Minimum Steps for a Knight to Reach Target
Given a square chessboard of size 'N x N', determine the minimum number of moves a Knight requires to reach a specified target position from its initial position...
- Ans.
Calculate minimum steps for a Knight to reach target position on a chessboard.
Use BFS algorithm to find the shortest path from Knight's starting position to target position.
Consider all possible moves of the Knight on the chessboard.
Keep track of visited positions to avoid revisiting them.
Return the minimum number of moves required to reach the target position.
- Q2.
Minimum and Maximum Candy Cost Problem
Ram is in Ninjaland, visiting a unique candy store offering 'N' candies each with different costs. The store has a special offer: for every candy you purchase, you c...
- Ans.
Determine the minimum and maximum amount of money needed to purchase all candies with a special offer.
Iterate through the candy costs array to find the minimum and maximum costs.
Consider the special offer to calculate the minimum and maximum costs.
Keep track of the total cost and free candies obtained during the process.
Return the minimum and maximum costs for each test case.
(3 Questions)
Round duration - 50 minutes
Round difficulty - Easy
The interview was conducted around 11am in the morning. The interviewer was professional and to the point while questioning. However he gave me hints whenever I got stuck anywhere.
- Q1.
Right View of Binary Tree
Given a binary tree of integers, your task is to output the right view of the tree.
The right view of a binary tree includes the nodes that are visible when the tree is observed...
- Ans.
The task is to output the right view of a binary tree, which includes the nodes visible when observed from the right.
Perform a level order traversal of the binary tree.
For each level, add the rightmost node to the result list.
Print the result list as the right view of the binary tree.
Handle null nodes by skipping them during traversal.
- Q2.
Cycle Detection in a Singly Linked List
Determine if a given singly linked list of integers forms a cycle or not.
A cycle in a linked list occurs when a node's
nextpoints back to a previous node in the ... - Ans.
Detect if a singly linked list forms a cycle by checking if a node's next points back to a previous node.
Use Floyd's Tortoise and Hare algorithm to detect a cycle in the linked list.
Initialize two pointers, slow and fast, and move them at different speeds through the list.
If there is a cycle, the two pointers will eventually meet at some node.
If one of the pointers reaches the end of the list (null), there is no cycle.
- Q3. Can you explain in detail about one of your projects?
Interview Preparation Tips
Tip 1 : Your basics should be very clear about data structures and algorithms.
Tip 2 : Try to solve questions in a specific time frame. Also dry run your code with custom test cases, try to find the edge cases.
Apart from this try analyzing the time and space complexity of your solution.
Tip 3 : Take a look at editorials after solving the questions as it can give you a better approach to the problem.
Tip 4 : Don't neglect subjects like OOP's, DBMS and OS. Interviews ask few questions from here as well.
Tip 1 : Do not fake any skills, projects or achievements. The interviewer gets to know about it by asking questions to you.
Tip 2 : Have at-least one good project on resume with all the details like technologies used and purpose.
Tip 3 : Don't write achievements which doesn't relate to your role. Write achievements which shows communication skills, leadership or teamwork.
Skills evaluated in this interview
Top trending discussions
Interview questions from similar companies
I appeared for an interview before May 2021.
(1 Question)
Round duration - 90 Minutes
Round difficulty - Medium
- Q1. You will be provided with SQL queries and code snippets along with their outputs or errors in the options. Can you analyze and determine the correct outputs or identify the errors?
- Ans.
Yes, I can analyze SQL queries and code snippets to determine correct outputs or errors.
Understand the SQL syntax and logic to identify errors in queries.
Check for syntax errors, missing or incorrect keywords, and data type mismatches.
Analyze the code snippets to identify logical errors or potential bugs.
Compare the expected output with the provided output to determine correctness.
(1 Question)
Round duration - 15 minutes
Round difficulty - Medium
- Q1. What can you tell me about joins and indexing in database management systems?
- Ans.
Joins are used to combine rows from two or more tables based on a related column, while indexing is a technique to improve the performance of queries by creating a data structure that allows for quick lookup of data.
Joins are used to retrieve data from multiple tables based on a related column, such as INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.
Indexing involves creating data structures like B-trees or hash table...
Round duration - 20 Minutes
Round difficulty - Medium
Interview Preparation Tips
Tip 1 : Be well versed with the concepts of Data Structures and SQL
Tip 2 : Should have thorough knowledge of your projects
Tip 1 : Mention your projects very clearly
Tip 2 : You should be able to justify everything on your resume from grades to skills
Skills evaluated in this interview
I appeared for an interview before Jun 2021.
Round duration - 90 Minutes
Round difficulty - Medium
(1 Question)
Round duration - 60 Minutes
Round difficulty - Medium
- Q1.
Validate Binary Search Tree Problem Statement
Your task is to determine if a given binary tree with 'N' nodes is a valid Binary Search Tree (BST). A BST is defined by the following properties:
- The lef...
- Ans.
Validate if a given binary tree is a valid Binary Search Tree (BST) based on its properties.
Check if the left subtree of a node has only nodes with data less than the node's data.
Verify if the right subtree of a node has only nodes with data greater than the node's data.
Ensure that both the left and right subtrees are also binary search trees.
Implement a validation function for a BST.
Output 'true' if the binary tree is...
Round duration - 60 Minutes
Round difficulty - Easy
Interview Preparation Tips
Tip 1 : Pratice regularly atleast 5 problem . Make it habit .Try to cover Leetcode medium questions as many as possible
Tip 2 : Be through with your projects . At some point interviewer will ask you some project related questions
Tip 3 : Be strong in your CS fundamentals.
Tip 1 : Do not put irrelevant information such as DOB
Tip 2 : Put only those skill which you can defend in cross questioning
Skills evaluated in this interview
I appeared for an interview before Dec 2020.
(1 Question)
Round duration - 87 minutes
Round difficulty - Medium
Timing : It was conducted in evening at 3 PM
The pacreception environment was very user friendly .
The platform was audio and video proctored.
- Q1.
Binary to Decimal Conversion
Convert a given binary number, represented as a string 'S' of size 'N', into its decimal equivalent integer and output it.
Input:
The first line contains an integer 'T', den... - Ans.
Convert a binary string to its decimal equivalent integer.
Iterate through the binary string from right to left, multiplying each digit by 2 raised to the power of its position.
Add the results of the multiplication to get the decimal equivalent.
Ensure the binary string consists only of '0' and '1' characters.
Handle multiple test cases by repeating the conversion process for each case.
(1 Question)
Round duration - 80 minutes
Round difficulty - Medium
So This was a very interactive round . There were two interviewers , one male and one female . The male interviewer was quite experienced where as female interviewer was relatively new . The Interview started by a small introduction followed by some OOPS related questions where I was tested on how i perceive the concept of OOPS in real life . Then this conversation was followed by some core concepts of JAVA like abstract classes and interfaces . Then I was asked about my projects that i mentioned in my resume , then after some healthy discussion on those projects , the interviewer started to question about DBMS , I was asked some basic queries followed by some advanced queries and then followed by a discussion on SQL vs NoSQL . Then Interviewers asked me about my tech stack and the source of my technical knowledge. Then at last I was asked that why Blackrock and this concluded my Interview.
- Q1.
Ninja And The Triangle Problem Statement
Ninja is provided with 'N' stars and the task is to construct a triangle such that the 'i'th level of the triangle uses 'i' number of stars. The goal is to make th...
- Ans.
Given 'N' stars, construct a triangle with maximum height using 'i' stars in 'i'th level.
Calculate the maximum height of the triangle using the formula: height = floor((-1 + sqrt(1 + 8 * N)) / 2)
Iterate through each test case and calculate the maximum height for each 'N'.
Output the maximum height for each test case.
Interview Preparation Tips
Tip 1 : Be precise about what to do and what not to do.
Tip 2 : Always Revise the concepts you have done in past , use prime day revision theory.
Tip 3 : Do as many projects as you can but always mention those projects in which you are very well versed.
Tip 4 : Keep on reading random news related to your favourite tech and always have an in depth knowledge of what tech you currently use.
Tip 1 : Keep it short , precise and effective .
Tip 2 : Mention even small things that you did had an impact on other people.
Skills evaluated in this interview
I appeared for an interview before Sep 2020.
(2 Questions)
Round duration - 60 Minutes
Round difficulty - Medium
This was a Technical round. About 60 students were shortlisted for this round. There were two interviewers. First, they asked me to introduce myself. Then I was asked some concepts of OOPS. some questions from OS and DBMS. I was asked to write code to reverse a link list on the notepad and share my screen. Then I was asked about my projects and internship. There were some situational questions related to the internship. They asked me what I know about the company.
My interview took place in the morning at around 10:00 a.m. and lasted for about an hour.
- Q1. What is the difference between Python and C++?
- Ans.
Python is a high-level, interpreted language known for its simplicity and readability, while C++ is a low-level, compiled language known for its performance and efficiency.
Python is dynamically typed, while C++ is statically typed.
Python uses indentation for code blocks, while C++ uses curly braces.
Python has automatic memory management, while C++ requires manual memory management.
Python is slower in execution compared...
- Q2.
Reverse Linked List Problem Statement
Given a singly linked list of integers, return the head of the reversed linked list.
Example:
Initial linked list: 1 -> 2 -> 3 -> 4 -> NULL
Reversed link... - Ans.
Reverse a singly linked list of integers and return the head of the reversed linked list.
Iterate through the linked list and reverse the pointers to point to the previous node instead of the next node.
Use three pointers to keep track of the current, previous, and next nodes while reversing the linked list.
Update the head of the reversed linked list as the last node encountered during the reversal process.
Round duration - 30 Minutes
Round difficulty - Medium
It was a virtual interview and there was just one interviewer. The interviewer was really friendly. First of all, the interviewer introduced himself and also shared some facts about the company. Then he asked me to introduce myself. Then behavioral and situational questions were asked. Then he asked if I was comfortable with relocation. BlackRock has 2 locations that are Gurgaon and Mumbai.
Interview Preparation Tips
Tip 1 : Revise Trees especially AVL trees and tree traversals as the major questions for data structures were from trees.
Tip 2 : Revise your OOPs concepts for the interview round.
Tip 3 : If you have done a project in development, make sure you know well about them.
Tip 1 : Mention only those things in your resume, you have knowledge about.
Tip 2 : A project in development is a plus.
Skills evaluated in this interview
I applied via Recruitment Consultant and was interviewed in May 2021. There were 4 interview rounds.
Interview Questionnaire
3 Questions
- Q1. C++ basics
- Q2. Swap words in strings
- Ans.
Swap words in strings
Split the string into words
Swap the words using a temporary variable
Join the words back into a string
- Q3. Virus contain leetcode
Interview Preparation Tips
Skills evaluated in this interview
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