What is nspersistentstore? Is it thread safe?
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Explain ~/documents, ~/library, ~/tmp. What directory is ~ on ios?
Can a "delegate" retained in ios?
When can you get ios 13?
what are the source items used by Xcode?
Explain your process for tracing and fixing a memory leak iOs?
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What is cocoa touch framework in ios?
Garbage collector in iphone?
What is a delegate xcode?
What is messaging? What is message forwarding?
What is iphone architecture?
What is difference between delegate and datasource in ios?
What is callback in ios?