Go-Jek Senior Software Engineer Interview Questions and Answers

Code in Go to find kth minimum element from a given list of numbers.

• Sort the list of numbers in ascending order

• Return the kth element from the sorted list

I would use Python for data analysis, Java for enterprise applications, and JavaScript for web development.

• Python - data analysis, machine learning, scientific computing (e.g. pandas, numpy)

• Java - enterprise applications, backend development (e.g. Spring framework)

• JavaScript - web development, front-end development (e.g. React, Angular)

Goroutines are lightweight threads that are managed by Go runtime.

• Goroutines are created using the 'go' keyword.

• They are multiplexed onto OS threads by Go runtime.

• They communicate using channels.

• They are scheduled cooperatively, not preemptively.

• They have a small stack size (2KB) compared to OS threads.

• They are used extensively in Go for concurrency and parallelism.

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

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 app performance

• Choose the appropriate image formats (e.g....read more

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 across multiple apps.

• Frameworks provide pre-built functio...read more