CME Group SDE (Software Development Engineer) Interview Questions and Answers

Q1. Simple question not very hard related to java
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Any online ideas, ds-algo, medium level

Swift, security framework, api, memory management

Q1. Basic ds-algo nd technical question
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Q1. Managerial question
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You will get base code from HR and you will be asked to enhance the code with few additional requirements and this will be reviewed in the next One On One discussion.
As part of One On One discussion, you need to explain your thought process and need to add few more enhancements

Q1. This round is mainly on checking your understanding on the projects you have worked on and why the project was implemented in a specific way
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Q1. This was a system design round. You will receive an open ended product requirement. You need to ask questions to refine the requirement and provide the solution
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Q1. This was the Bar Raiser round. Questions were mainly on how you will handle a certain situations in the company
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There was a take home coding test - application to allot a parking lot.

Q1. Questions around optimisations around parking lot application submitted in round1. Implement more use cases asked on the spot System Design/Scaling related questions
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Q1. Mine was java, so Java technical questions, Java new features Questions around Design patterns Questions on SOLID principles
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Q1. Use case was given for wallet(e.g. pay later wallet) and asked to design basic REST APIs. E.g. User have balance in wallet User makes transaction via the wallet User add money in wallet
Ans. 
Design REST APIs for a pay later wallet system with user balance, transactions, and fund additions.
• GET /wallet/{userId} - Retrieve the user's wallet balance.

• POST /wallet/{userId}/transaction - Create a new transaction using wallet balance.

• POST /wallet/{userId}/add-funds - Add money to the user's wallet.
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Q1. It was 1 hour round. This was round with Engineering Technical Head. The questions were around willingness to work, long term / short term goals, high level behavioural questions, cross questions to evalua...read more
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Q1. This was HR round, around 20 minutes
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Q1. How to build an caching layer for iOS Apps
Ans. 
Building a caching layer for iOS Apps
• Identify the data that needs to be cached

• Choose a caching mechanism (e.g., NSCache, CoreData, SQLite)

• Implement caching logic in the app's data access layer

• Define cache eviction policies to manage memory usage

• Consider using a cache expiration mechanism

• Handle cache invalidation when data changes

• Optimize cache performance by using appropriate data structures
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Q2. How to optimise image rendering for iOS Apps
Ans. 
Optimizing image rendering for iOS Apps involves techniques like image compression, caching, lazy loading, and using the appropriate image formats.
• Use image compression techniques like JPEG or PNG optimization to reduce file size without compromising quality

• Implement caching mechanisms to store and retrieve images locally, reducing network requests

• Utilize lazy loading to load images only when they are needed, improving...read more
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Q3. Tell me about framework types in iOS
Ans. 
There are several types of frameworks in iOS, including system frameworks, third-party frameworks, and custom frameworks.
• System frameworks are provided by Apple and include UIKit, Foundation, and Core Data.

• Third-party frameworks are developed by external developers and can be integrated into iOS apps, such as Alamofire and Firebase.

• Custom frameworks are created by developers for specific project needs and can be reused...read more
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Machine Coding Round

Low level design - ATM design

High level design - Uber

Q1. Director of engineering round
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Q2. Motivation to join the company
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Q3. Previous roles and responsibilities held
Ans. 
I have held roles as a software engineer, team lead, and project manager, focusing on full-stack development and agile methodologies.
• Led a team of 5 engineers in developing a microservices architecture for a healthcare application, improving scalability by 30%.

• Managed end-to-end project lifecycle for a financial software product, ensuring timely delivery and adherence to budget constraints.

• Implemented CI/CD pipelines t...read more
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One machine coding round, parking lot question

Q1. Question related to parking lot
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Q2. Current project related questions
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Q1. High level design
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Q2. Yet to appear ......
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Q1. Circle process related questions
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Q2. Scripting language questions
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