2970587
Questão 1
Questão
You can increase and decrease the size of an Array
Responda
- True
- False
Questão 2
Questão
Which of the properties are the properties of an ArrayList?
Responda
-
It implements the interface List
-
It maintains it insertion
-
It doesn't allow duplicate value to be added to it
-
It allows null values to be added
Questão 3
Questão
What happens when you create the following object of an ArrayList?
ArrayList<String> anArrList = new ArrayList<>();
Responda
-
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
Questão 4
Questão
Which of the statements are true ?
Responda
-
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
-
The capacity of the ArrayList is the length of this instance variable
-
All are true
Questão 5
Questão
The reference to the instance variable that stores the element of the ArrayList is: elementData
Responda
- True
- False
Questão 6
Questão
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.
Responda
- True
- False
Questão 7
Questão
An Array can accept duplicate object values
Responda
- True
- False
Questão 8
Questão
What does clone method defined in the class ArrayList doe ? Which of the statements are true?
Responda
-
It creates a new instance of the ArrayList to be cloned
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It copies the element references, but not the objects
-
Both of the answers are true
-
Non of the above
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