2970587
Question 1
Question
You can increase and decrease the size of an Array
Answer
- True
- False
Question 2
Question
Which of the properties are the properties of an ArrayList?
Answer
-
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
Question 3
Question
What happens when you create the following object of an ArrayList?
ArrayList<String> anArrList = new ArrayList<>();
Answer
-
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
Question 4
Question
Which of the statements are true ?
Answer
-
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
Question 5
Question
The reference to the instance variable that stores the element of the ArrayList is: elementData
Answer
- True
- False
Question 6
Question
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.
Answer
- True
- False
Question 7
Question
An Array can accept duplicate object values
Answer
- True
- False
Question 8
Question
What does clone method defined in the class ArrayList doe ? Which of the statements are true?
Answer
-
It creates a new instance of the ArrayList to be cloned
-
It copies the element references, but not the objects
-
Both of the answers are true
-
Non of the above
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