________ is the Internet's largest social network, with more than 1 billion active monthly users worldwide

An abstract class will:

a. Have all zero function pointers in its vtable. b. Have at least one zero function pointer in its vtable. c. Share a vtable with a derived class. d. Have fewer zero function pointers in its vtable than concrete classes have.

Which language(s) use(s) the this keyword as a metaphor to refer to the current object within that object's context?

A. C# only B. Java only C. C# and Java D. C#, Java, Objective-C