Practice Iteration And Bulk Operations (4.4) - Java Collections Framework (Advanced

Practice: Iteration and Bulk Operations

Lesson 4.4Java Collections Framework (Advanced

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10 questions

Flashcard drill
4 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What does an Iterator do?
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Think about how you move through a line of people.
Question 2.
What operation would you use to print each element in a list?
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Remember the action to perform for each item.
3Question 3.
What does the removeIf method do in a collection?
- It adds elements to the collection.
- It updates all elements.
- It removes elements that match a condition.
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Think about filtering out elements.
4Question 4.
True or False: The ListIterator can only traverse a list in one direction.
- True
- False
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Consider how people can move in a room.
Question 5.
Create a custom class and demonstrate the use of an Iterator to traverse through a collection of objects of that class, printing their properties.
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Focus on object-oriented design.
Question 6.
Given a list of integers, use the replaceAll and removeIf methods to first delete all even numbers and then square all the remaining odd numbers.
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Think about filtering and transforming in one go.

6 more questions in this section. Enroll free to practise them all.