Groww Senior Software Engineer Interview Questions and Answers

Design a system for a Snake and Ladder game, focusing on game mechanics and player interactions.

• Define the board as a 10x10 grid with snakes and ladders represented as mappings.

• Implement player movement based on dice rolls, e.g., rolling a 4 moves a player from position 1 to 5.

• Handle snake bites and ladder climbs by adjusting player positions accordingly.

• Include game rules for winning, such as reaching position 100 fir...read more

Find k closest elements in an array

• Sort the array based on the absolute difference between each element and the target element

• Return the first k elements from the sorted array

Find the K closest elements to a given value in a sorted array.

• Use binary search to find the closest element to the target.

• Maintain a sliding window of size K around the closest element.

• Consider edge cases where K is larger than the array size.

• Example: For array [1, 2, 3, 4, 5] and target 3, K=2, output is [2, 3].

REST API is a standard way of building web services, while Kafka is a distributed streaming platform for handling real-time data feeds.

• REST API is used for building web services that follow the REST architectural style

• Kafka is used for handling real-time data feeds and building real-time data pipelines

• REST API is synchronous, while Kafka is asynchronous and can handle high throughput and low latency data streams

The question is asking about how to find the frequency of each character in a given string.

• Iterate through the string and count the occurrences of each character

• Store the counts in a data structure like a hashmap or array

• Return the counts for each character

Reverse a given string

• Create a new empty string to store the reversed string

• Iterate through the original string from end to start and append each character to the new string

• Return the reversed string

Find the length of the longest increasing subsequence in an array.

• Use dynamic programming to solve this problem efficiently.

• Iterate through the array and keep track of the longest increasing subsequence ending at each index.

• Example: For array [10, 22, 9, 33, 21, 50, 41, 60, 80], the longest increasing subsequence is [10, 22, 33, 50, 60, 80] with length 6.

A polyfill for useEffect mimics React's useEffect behavior in non-React environments.

• useEffect is a React Hook that allows you to perform side effects in function components.

• A polyfill can be created using JavaScript closures to mimic the behavior of useEffect.

• Example: A simple polyfill could store effects in an array and execute them after rendering.

• You can use setTimeout to simulate the component lifecycle for cleanu...read more