Interview Questions: Dispatch Queues ( Concurrent Queues)

Q.What is the method used to implement Concurrent Queues?
A. dispatch_get_global_queue

Q. Apart from one main Queue How many types of Concurrent Queues apart from Main Queue?
A. 4

Q. What are the priority types for Concurrent Queue?

DISPATCH_QUEUE_PRIORITY_HIGH
DISPATCH_QUEUE_PRIORITY_DEFAULT
DISPATCH_QUEUE_PRIORITY_LOW
DISPATCH_QUEUE_PRIORITY_BACKGROUND

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