What is a retain cycle?
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Define autorealease pool?
What is a difference between stack and heap memory?
What is ios deadlock?
Explain the difference between developer and enterprise developer accounts?
Screen resolution of iPhone & iPad
what is the difference between nonatomic & atomic ? which is thread safe and why
What is the use of appdelegate in ios?
What is dispatch queue in ios?
Explain concept of notification center, local and remote notifications.
what are the build phases available in Xcode?
what’s accessibilityhint?
Explain place holder constraint