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10+ Outpace Consulting Services Interview Questions and Answers

Updated 3 Oct 2024
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Q1. Given a grid containing 0s and 1s and source row and column, in how many ways, could we reach form source to target. ( 1's represents a blockade and 0's represent accessable points)

Ans.

Count the number of ways to reach target from source in a grid with 0s and 1s.

  • Use dynamic programming to solve the problem efficiently.

  • Traverse the grid using DFS or BFS to count the number of ways.

  • Consider edge cases like when source and target are the same or when there is no path.

  • Example: Given grid = [[0,0,0],[0,1,0],[0,0,0]], source = (0,0), target = (2,2), answer is 2.

  • Example: Given grid = [[0,1],[0,0]], source = (0,0), target = (1,1), answer is 1.

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Q2. 1. High Level System Design -> Design Uber like Service. Follow up -> What would be your tech stack for designing such a service to make sure it could scale when needed.

Ans.

Tech stack for designing a scalable Uber-like service.

  • Use microservices architecture for scalability and fault tolerance.

  • Choose a cloud provider with auto-scaling capabilities.

  • Use a load balancer to distribute traffic across multiple instances.

  • Use a NoSQL database for high availability and scalability.

  • Use message queues for asynchronous communication between services.

  • Use containerization for easy deployment and management.

  • Use caching to improve performance.

  • Use monitoring and ...read more

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Q3. (HLD) -> Design a service which combines multiple sources of data/documentation and aggregates it such that all info is available centrally.

Ans.

Design a service to aggregate multiple sources of data/documentation centrally.

  • Identify sources of data/documentation

  • Determine data aggregation method

  • Design a centralized database to store aggregated data

  • Develop a user-friendly interface to access the data

  • Ensure data security and privacy

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Q4. Given a monolith architecture, how would you scale it to handle 3x the traffic and also improve response time on API's during peak hours by using cache

Ans.

To scale a monolith architecture and improve response time, use horizontal scaling and implement caching.

  • Implement horizontal scaling by adding more instances of the monolith application behind a load balancer

  • Use a distributed cache to store frequently accessed data and reduce database queries

  • Implement caching at different levels such as application-level caching, database query caching, and HTTP response caching

  • Use a caching strategy based on the data access patterns and exp...read more

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Q5. Given two sorted arrays, a (m elements, size m+n) and b (n elements, size n) merge both the arrays into the first array a.

Ans.

Merge two sorted arrays into the first array

  • Start from the end of both arrays and compare elements

  • Place the larger element at the end of the first array

  • Continue this process until all elements are merged

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Q6. Class design for a cache implementation, implement get(), put(), initialization methods

Ans.

Design a cache class with get(), put(), and initialization methods.

  • Define a class with a data structure to store key-value pairs.

  • Implement a get() method to retrieve a value from the cache based on a given key.

  • Implement a put() method to add or update a key-value pair in the cache.

  • Implement an initialization method to set the initial capacity and eviction policy of the cache.

  • Consider using a hash map or a linked list to store the key-value pairs efficiently.

  • Handle cache size ...read more

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Q7. Design a custom data structure based on requirement

Ans.

Custom data structure for array of strings

  • Use a trie data structure to efficiently store and search for strings

  • Implement methods for adding, removing, and searching for strings in the trie

  • Consider optimizing the trie for memory usage and performance

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Q8. internal working - of DB structures and indices etc

Ans.

Understanding internal workings of DB structures and indices is crucial for optimizing database performance.

  • DB structures refer to how data is organized within a database, such as tables, columns, and relationships.

  • Indices are data structures that improve the speed of data retrieval operations by providing quick access to specific data values.

  • Understanding how indices work can help in optimizing query performance by reducing the number of rows that need to be scanned.

  • Common t...read more

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Q9. Spring boot API endpoint description

Ans.

Spring Boot API endpoint is a URL that exposes the functionality of a web service.

  • API endpoints are the entry points for the client to access the server's resources.

  • Spring Boot provides a simple and easy way to create RESTful APIs.

  • Endpoints can be secured using Spring Security.

  • Endpoints can be documented using Swagger or Spring REST Docs.

  • Examples: /users, /products, /orders

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Q10. how to implement timer

Ans.

A timer can be implemented using a combination of system time and a loop that checks for elapsed time.

  • Get the current system time at the start of the timer

  • Enter a loop that continuously checks the difference between the current system time and the start time

  • When the desired time has elapsed, perform the desired action or trigger an event

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Q11. how to implement useEffect

Ans.

useEffect is a hook in React that allows you to perform side effects in functional components.

  • useEffect is used to handle side effects in React components.

  • It takes two arguments: a function and an optional array of dependencies.

  • The function inside useEffect is executed after the component renders.

  • The optional array of dependencies determines when the effect should run.

  • If the array of dependencies is empty, the effect runs only once after the initial render.

  • If the array of dep...read more

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Q12. Built a react feature

Ans.

Built a react feature

  • Identify the specific feature to be built

  • Design the component hierarchy and state management

  • Implement the feature using React components and hooks

  • Test the feature for functionality and user experience

  • Refactor and optimize the code for performance

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Q13. Design an econmerce website

Ans.

Design an ecommerce website for online shopping

  • User-friendly interface for easy navigation

  • Secure payment gateway integration

  • Product categorization and search functionality

  • Customer reviews and ratings

  • Responsive design for mobile compatibility

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Interview Process at Outpace Consulting Services

based on 11 interviews
2 Interview rounds
Technical Round - 1
Technical Round - 2
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