Java / Generic Programming When an iterator is created, what element will be removed if the...
Java / Generic Programming
When an iterator is created, what element will be removed if the "remove" method is called right away?
* The first one
* None-remove is not allowed to be called right way
* None-remove will throw a NoSuchElementException.
* The last one.
What is an advantages of using "enhanced for loops" rather than explicitly using iterators?
* It generates faster code.
* It can handle generic containers.
* It doesn't misbehave if the collection changes during the iteration.
* It provides a simple syntax for removing elements.
* It yields a simpler, clearer program.
Choose the correct statements about iterators from the following list (choose all that are correct):
In contrast to external iterators, internal iterators provide access to the current element
In contrast to external iterators, internal iterators are used in Java collections.
In contrast to internal iterators, external iterators are their own object.
In contrast to external iterators, internal iterators use methods of the collection to move.
In contrast to internal iterators, external iterators permit multiple iterations to happen simultaneously.
In contrast to internal iterators, external iterators are easier to program.
What is the purpose of the Cloneable interface?
- To tell Java that it is allowed to make a shallow copy of the object.
- To give an ordering of instances.
- To ensure that copies of the instances will be deep clones.
- To say that instances can never be null
- To declare that the class provides a public clone method.
Homework Answers
When an iterator is created, what element will be removed if the "remove" method is called right away?
Answer : The last one
What is an advantages of using "enhanced for loops" rather than explicitly using iterators?
Answer : It can handle generic containers.
Choose the correct statements about iterators from the following list (choose all that are correct):
Answer :
In contrast to external iterators, internal iterators are used in Java collections.
In contrast to external iterators, internal iterators use methods of the collection to move.
What is the purpose of the Cloneable interface?
Answer : To ensure that copies of the instances will be deep clones.
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