Quiz

iOS Interview

jmadahar 5 perguntas

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Perguntas do quiz (5)

1A subclass inherits the instance variables and methods from its superclass
1. AVerdadeiro
2. BFalso
2Assigning a floating point value to an integer variable
1. Acauses the float to be truncated on the assignment
2. Bcauses the float to be rounded and then assigned
3. Ccauses the float value to be stored unchanged
4. Dis not a valid assignment
3What represents deep copy of an array?
1. AnewArray = oldArray
2. BnewArray = [NSMutableArray arrayWithArray:oldArray];
3. CBoth of above
4. DNone of above
4Which is the correct chain for UIButton?
1. ANSObject --> UIControl --> UIView --> UIResponder --> UIButton
2. BNSObject --> UIResponder --> UIView --> UIControl --> UIButton
3. CUIResponder --> NSObject --> UIView --> UIControl --> UIButton
4. DNSObject --> UIResponder --> UIView --> UIButton --> UIControl
5Which of the option is faster/optimised way of calling method?
1. A[anObject aMethod];
2. B[anObject performSelector:@selector(aMethod)];
3. CBoth are same
4. DCan't be calculated