Exam 98-388 topic 1 question 12 discussion

Actual exam question from Microsoft's 98-388

Question #: 12
Topic #: 1

HOTSPOT -
You are creating a method that processes invoices. The invoices are contained in an ArrayList instance. After each invoice is processed, the method must remove the invoice from the ArrayList instance.
How should you complete the code? To answer, select the appropriate code segments in the answer area.
NOTE: Each correct selection is worth one point.
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References:
https://beginnersbook.com/2013/12/java-arraylist/

by mtmoore at Aug. 23, 2020, 10:13 p.m.

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mtmoore

Highly Voted 4 years, 9 months ago

The last dropdown should be ")", if you use i=i+1 in this case it will skip over elements because the index of the elements in an arraylist change as elements are added or removed (if you had 3 elements and removed the 2nd element, you don't have elements with index 0 and index 2 left, you have 0 and 1 left). In other words, you actually want to perform this operation on the first item in the list (0) over and over again until the list is empty.

upvoted 5 times

Abhitera

4 years, 3 months ago

Correct

upvoted 2 times

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Lordhoobla

Most Recent 4 years ago

For this question, there is no proper answer that is given. If there is a change in the step variable, the traversal process will be exclusive to certain values; if there was no step, the compiler would mark it as a syntax error. The correct way of typing it would be "i+=0". It bypasses the compiler while also not stepping up so every element is covered

upvoted 1 times

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cmgal306

4 years, 5 months ago

Not really, since to actually have the for loop work correctly, it would need to add to the original integer. It wouldn't end if you didn't add onto it.

upvoted 2 times

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