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12 Multiple choice questions

  1. NSString *myString = [a objectAtIndex: 2];
  2. immutable
  3. [a insertObject: [NSNull null] atIndex: 0];
  4. cannot
  5. collection
  6. [a addObject: myObj];
  7. address
  8. dynamically
  9. int numberOfObjects = [a count];
  10. can
  11. [a insertObject:myObj atIndex:0];
  12. ordered...index