Of Five Letters (A, B, C, D, and E), Two

question 71

Multiple Choice

Of five letters (A, B, C, D, and E) , two letters are to be selected at random. How many possible selections are possible?

• A)20
• B)7
• C)5!
• D)10

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Definitions:

Garbage Collection

An automatic memory management process that frees up memory used by objects that are no longer accessible in a program.

Encapsulation

A fundamental concept in object-oriented programming that involves bundling the data (attributes) and methods (functions) that operate on the data into a single unit or class, and restricting access to the specifics of the data or methods.

Head Instance Variable

A variable, typically in a linked list or similar data structure, that holds a reference to the first element or node.

Null

A special marker used in programming to denote that a variable does not hold any valid object or value at a particular time.