The C# language provides the ____________ data type that you can use to create variables that hold true or false values.

a. bool
b. int
c. Boolean
d. double


a. bool

Computer Science & Information Technology

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If an app needs to perform a derived-class-specific operation on a derived class object reference by a base class variable, the app must first cast the base class reference to a derived class reference through a technique known as _________.

a) downcasting b) upcasting c) decreasecasting d) increasecasting

Computer Science & Information Technology

Hackers often use a botnet to launch a ____, or a bombardment of network traffic or messages designed to overload a server.?

A. ?TCP/IP attack B. ?denial of service (DoS) attack C. ?Theft by computer D. ?Trojan horse attack

Computer Science & Information Technology

____ permits the same operation to invoke one set of results on data values of a base class and a different set of results on data values of a derived class.

A. Polymorphism B. Inheritance C. Class construction D. Encapsulation

Computer Science & Information Technology

In a _____ traversal, the processing proceeds horizontally from the root to all of its children, then to its children's children, and so forth until all nodes have been processed.

A. breadth-first B. depth-first C. height-first D. level-first

Computer Science & Information Technology