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?

Which interface provides the capability to store objects using a key-value pair?

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?