2970587
Frage 1
Frage
You can increase and decrease the size of an Array
Antworten
- True
- False
Frage 2
Frage
Which of the properties are the properties of an ArrayList?
Antworten
-
It implements the interface List
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It maintains it insertion
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It doesn't allow duplicate value to be added to it
-
It allows null values to be added
Frage 3
Frage
What happens when you create the following object of an ArrayList?
ArrayList<String> anArrList = new ArrayList<>();
Antworten
-
the no-argument constructor defined in the class ArrayList.java, constructs an empty list with an initial capacity of ten
-
the no-argument constructor defined in the class ArrayList.java, construct an empty list with an no capacity
-
Non of the above
Frage 4
Frage
Which of the statements are true ?
Antworten
-
ArrayList defines a instance variable of type List to store all it's individual elements
-
ArrayList defines a instance variable of type Array to store all it's individual elements
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The capacity of the ArrayList is the length of this instance variable
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All are true
Frage 5
Frage
The reference to the instance variable that stores the element of the ArrayList is: elementData
Antworten
- True
- False
Frage 6
Frage
The method addAll (Collection<? extends E> c) appends all the elements in the specified collection's to the end of this list, in the order they're returned by the specified iterator.
Antworten
- True
- False
Frage 7
Frage
An Array can accept duplicate object values
Antworten
- True
- False
Frage 8
Frage
What does clone method defined in the class ArrayList doe ? Which of the statements are true?
Antworten
-
It creates a new instance of the ArrayList to be cloned
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It copies the element references, but not the objects
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Both of the answers are true
-
Non of the above
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