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I applied via Campus Placement and was interviewed in Jul 2024. There were 2 interview rounds.
100 minutes, there were 3 coding questions and some easy to medium level mcq on core subjects
A playlist can be implemented using an array of strings to store the list of songs.
Use an array of strings to store the list of songs in the playlist
Implement functions to add, remove, and shuffle songs in the playlist
Consider using a linked list data structure for more efficient insertion and deletion operations
DSA and lagorithmic optimizations (this is based on team you are joining so questions vary a LOT)
Binary search tree
Linked list
I have experience with a variety of technologies including Java, Python, SQL, and JavaScript.
Java
Python
SQL
JavaScript
I applied via Referral and was interviewed before Sep 2022. There were 3 interview rounds.
Medium level leetcode questions and some apti very rare but.
Good practice of data structures, algorithms, and operating systems is essential for software engineers.
Regularly practice coding challenges to improve problem-solving skills
Understand the time and space complexity of algorithms
Learn about different data structures and when to use them
Familiarize yourself with operating system concepts like processes, threads, and memory management
Check for cycle in a linked list by using two pointers approach.
Use two pointers, one moving at double the speed of the other.
If there is a cycle, the two pointers will eventually meet.
Alternatively, use a hash set to keep track of visited nodes.
Druva interview questions for designations
posted on 10 Nov 2015
I appeared for an interview before Oct 2020.
Round duration - 40 minutes
Round difficulty - Medium
Asked about time complexity of algorithm, puzzles, DBMS, cutting edge technologies etc. What are indexes?
Given an array of integers ARR
of size N, consisting of 0s and 1s, you need to select a sub-array and flip its bits. Your task is to return the maximum count of 1s that can b...
Given an array of 0s and 1s, find the maximum count of 1s by flipping a sub-array at most once.
Iterate through the array and keep track of the maximum count of 1s obtained by flipping a sub-array.
Consider flipping a sub-array from index i to j and calculate the count of 1s in the resulting array.
Return the maximum count of 1s obtained by flipping a sub-array at most once.
Round duration - 20 minutes
Round difficulty - Medium
Asked 1 standard algorithm
You are provided with a 2-dimensional matrix having N
rows and M
columns, containing only 1s (land) and 0s (water). Your goal is to determine the number of islands in t...
Count the number of islands in a 2D matrix of 1s and 0s.
Iterate through the matrix and perform depth-first search (DFS) to find connected 1s.
Mark visited cells to avoid redundant traversal.
Increment island count whenever a new island is encountered.
Tip 1 : prepare for competitive programming
Tip 2 : know about standard algorithm
Tip 3 : must be good with dbms
Tip 1 : must have projects, which you can explain to them
Tip 2 : have things on resume, that you are totally certain about.
I applied via Naukri.com and was interviewed in Oct 2020. There was 1 interview round.
Joins are used to combine data from two or more tables based on a related column.
Types of joins include inner join, left join, right join, and full outer join.
Inner join returns only the matching rows from both tables.
Left join returns all rows from the left table and matching rows from the right table.
Right join returns all rows from the right table and matching rows from the left table.
Full outer join returns all row...
I appeared for an interview in Jul 2024.
Leet code medium level question
Hashmap is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.
Hashmap uses a hashing function to map keys to indices in an array.
It allows for constant time complexity O(1) for insertion, deletion, and retrieval operations.
Example: HashMap<String, Integer> map = new HashMap<>(); map.put("key", 123); int value = map.get("key");
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