Explain how an autorelease pool works at the runtime level
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Answer / Anuj Baliyan
An autorelease pool in iOS manages objects that have been sent autorelease messages. It collects these objects and releases them automatically when the pool is drained, typically at specific points during the runloop execution.
1. Create an autorelease pool by calling [[NSAutoreleasePool alloc] init] or @autoreleasepool { ... } block.
2. Add objects to the pool by sending them autorelease messages.
3. Drain the pool by calling [pool drain], which releases all allocated objects and invalidates the pool object.
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