# A problem about IS-A

Fu Dong Jia

Ranch Hand

Posts: 131

posted 8 years ago

- 0

Which statements are true(choose all that applay)

a,is-a relationships always rely on inherritance.

b,is-a relationships always rely on instance variables.

c,is-a relationships always require at least two class types.

d,is-a relationships always rely on Polymorphism.

e,is-a relationships always tighthy coupled.

the answer is a,c and d.

I think there is only c is right.

Can anyone explain this.

thanks in advance.

a,is-a relationships always rely on inherritance.

b,is-a relationships always rely on instance variables.

c,is-a relationships always require at least two class types.

d,is-a relationships always rely on Polymorphism.

e,is-a relationships always tighthy coupled.

the answer is a,c and d.

I think there is only c is right.

Can anyone explain this.

thanks in advance.

who dare win!<br />SCJP5(94%)|SCWCD5(86%)|SCBCD(100%)|SCEA in progress

Kelvin Chenhao Lim

Ranch Hand

Posts: 513

posted 8 years ago

- 0

As you've discovered, this particular K&B mock exam question is unfortunately not very precise. See this thread for an earlier discussion of this question, including a brief comment by Bert.

SCJP 5.0

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