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Is Stack and push() on the exam?  RSS feed

 
Darren Littlepage
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I am using Enthuware and ran across this question.
I did not see this in the objectives for the exam.
I ran across a post on this forum from 2002 about it.

What will the following program print when run?



I'm using K&B SCJP 6 and didn't see any mention of it.
btw the answer is:
[100][]
 
Ankit Garg
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As per the objectives its possible as Stack class implements List and the SCJP objectives mentions this
Write code that uses the generic versions of the Collections API, in particular, the Set, List, and Map interfaces and implementation classes.

Stack class itself is actually simple if you know about the interfaces that it implements and if you know the general working of stacks i.e. last in first out (LIFO)...
 
Darren Littlepage
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Thanks Ankit.

I think I can learn it quickly as I did a lot of work with Vectors and ArrayLists a few years ago. A few new methods to play with and I should have it down.
 
Deepak Bala
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Darren Littlepage wrote:Thanks Ankit.

I think I can learn it quickly as I did a lot of work with Vectors and ArrayLists a few years ago. A few new methods to play with and I should have it down.


The stack helps at work too. So learn it anyway
 
Paul Anilprem
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This question is not really about Stacks though you should be able to answer it even if you know nothing about the Stack class.
 
Darren Littlepage
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This question is not really about Stacks though You should be able to answer it even if you know nothing about the Stack class.


I disagree.
I did not know what behavior push() has on a Stack object or if the object and method were just made up. I was not able to know if it is going to affect the reference passed in as an argument or not and how. I did not know what Stack.toString() method would return.

I just learned the hard way that Stack and push() exist and what they do.

It's good to know though.
 
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