[Solved] Consider this Swift code:func fetchData() throws -> String { throw NSError(domain: "Error", code:... process()What happens if process() is called with try?? | iOS Swift

iOS Swift - Swift Language Essentials

Consider this Swift code:

func fetchData() throws -> String {
  throw NSError(domain: "Error", code: 1)
}

func process() throws {
  try fetchData()
}

try? process()

What happens if process() is called with try??

AReturns the string from fetchData

BReturns nil because fetchData throws an error

CThrows a runtime error

DCompilation error due to missing catch

Step-by-Step Solution

Solution:

Step 1: Analyze fetchData throwing behavior
fetchData() always throws an error.
Step 2: Understand try? with throwing functions
try? process() returns nil if an error is thrown anywhere inside.
Final Answer:
Returns nil because fetchData throws an error -> Option B
Quick Check:
try? returns nil on error = C [OK]

Quick Trick: try? returns nil if any called function throws [OK]

Common Mistakes:

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