Multiple choice

Which of the following is an incorrect statement about the NSNumber class in Objective C?

  1. It is a lightweight class.

  2. It is used to store and retrieve primitive values.

  3. %@ format specifier is used for this class.

  4. NSNumber objects are immutable.

  5. The NSNumber object can be made mutable.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

These objects can not be made mutable.

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