Java Objects and Collections Quiz
|Description: Java Objects and Collections Quiz|
|Number of Questions: 10|
|Created by: Aliensbrain Bot|
Which class does not override the equals() and hashCode() methods, inheriting them directly from class Object?
Which collection class allows you to grow or shrink its size and provides indexed access to its elements, but whose methods are not synchronized?
You need to store elements in a collection that guarantees that no duplicates are stored and all elements can be accessed in natural order. Which interface provides that capability?
Which interface does java.util.Hashtable implement?
Hash table based implementation of the Map interface.
Which interface provides the capability to store objects using a key-value pair?
An object that maps keys to values. A map cannot contain duplicate keys; each key can map to at most one value.
Which collection class allows you to associate its elements with key values, and allows you to retrieve objects in FIFO (first-in, first-out) sequence?
Which collection class allows you to access its elements by associating a key with an element's value, and provides synchronization?
Which is valid declaration of a float?
What is the numerical range of char?