C++ Variables and Data Types

Which best describes a variable?

• Variables store program data while code runs
• Variables control memory space
• Variables are individual values in a database table
• Variables enable programmers to work with different input devices

Which of the following is false?

• Variable values can change while a program runs
• Variables make it possible to process almost any kind of data
• All variables use the same amount of memory
• Variables must be stored in a database or file if they are to be retained when the program ends

To use the value of a variable you need to know:

• The size of the memory used by its data type
• The source of the data being stored
• The physical address location in memory
• A name to reference the data type

Which of the following data types CANNOT store the number 47,255?

• double
• int
• String
• char

In C++ the syntax to declare a variable is:
  datatype variablename;
Which of the following C++ declarations are invalid?

• bool lives;
• integer intScore; 
• char Broiled; 
• double DeCtuRn;

Which holds integers or real numbers with 8 bytes of memory allocated?

• int
• double
• bool
• String

Which holds alphanumerics using character encoding? (size varies)

• bool
• int
• decimal
• String

Which holds whole numbers? (4 bytes)

• String
• bool
• int
• double

Which holds true or false data?

• bool
• int
• double
• String

What is the title of our textbook's Chapter 3?

• Variables and Constants
• Introducing C++
• Controlling Program Flow
• Conditional Control Structures