Q: How GCD works?
Lead Ios Developer Interview Questions
4,728 lead ios developer interview questions shared by candidates
How to perform the concurrent updates of an array by multiple threads.
Difference between implicitly unwrapped optional variables & non-optional variables.
Describe differences between OperationQueues and DispatchQueues and what determine when to use which?
You have an app that downloads images to display them in cells. How would you change it to extract the download logic from the cell?
You are presented with a class that is not tested. How would you implement unit tests for it?
All the basic areas of iOS ,objective c and swift.
concurrency threading, Actor usage and definition
Find problems in a presented code sample and try to refactor it
Q: Writer down function and you do't need to use higher end function. ["rat","cat", "horse","cat","rat"] Get the index of 1st repeated name And also get unique array without set.
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