Reg.Collection

[Angela Narain]

Which of the following are true ?
( select any three )
1.Set extends Collection
2. All methods defined in the Set are also defined in Collection
3. List extends Collection
4. All methods defined in the List are also defined in Collection
5. Map extends Collection
I suppose it is 1, 2, and 3

[Roopa Bagur]

Yes I think so..

Originally posted by Angela Narain:
Which of the following are true ?
( select any three )
1.Set extends Collection
2. All methods defined in the Set are also defined in Collection
3. List extends Collection
4. All methods defined in the List are also defined in Collection
5. Map extends Collection
I suppose it is 1, 2, and 3

[Guoqiao Sun]

Hi, Angela, 1 and 3 are of course correct, 5 is definitely wrong. As to 2 and 4, since Set interface does not define any new method, it is also correct. It is not the case with List.
So I agree with you, 1, 2 and 3 are correct.
Regards,

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Guoqiao Sun
Sun Certified Programmer for Java™ 2 Platform
try my mock exam¹² at my homepage.