2970587
Pregunta 1
Pregunta
You can increase and decrease the size of an Array
Respuesta
- True
- False
Pregunta 2
Pregunta
Which of the properties are the properties of an ArrayList?
Respuesta
-
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
Pregunta 3
Pregunta
What happens when you create the following object of an ArrayList?
ArrayList<String> anArrList = new ArrayList<>();
Respuesta
-
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
Pregunta 4
Pregunta
Which of the statements are true ?
Respuesta
-
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
Pregunta 5
Pregunta
The reference to the instance variable that stores the element of the ArrayList is: elementData
Respuesta
- True
- False
Pregunta 6
Pregunta
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.
Respuesta
- True
- False
Pregunta 7
Pregunta
An Array can accept duplicate object values
Respuesta
- True
- False
Pregunta 8
Pregunta
What does clone method defined in the class ArrayList doe ? Which of the statements are true?
Respuesta
-
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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