Which of the following Swift statements correctly tests if two class instances x and y are the same object?

easy📝 Syntax Q3 of 15

Swift - Operators and Expressions

Which of the following Swift statements correctly tests if two class instances x and y are the same object?

Aif x == y { print("Same instance") }

Bif x === y { print("Same instance") }

Cif x = y { print("Same instance") }

Dif x !== y { print("Same instance") }

Step-by-Step Solution

Solution:

Step 1: Identify identity operator
Use === to check if two references point to the same instance.
Step 2: Analyze options
if x === y { print("Same instance") } uses === correctly. if x == y { print("Same instance") } uses == which checks value equality, not identity. if x = y { print("Same instance") } is an assignment, not a comparison. if x !== y { print("Same instance") } checks inequality, not equality.
Final Answer:
if x === y { print("Same instance") } -> Option B
Quick Check:
Use === for identity comparison [OK]

Quick Trick: Use === to check if two references are identical [OK]

Common Mistakes:

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