C++ Chapter 2

What is the difference between the following two lines of code:

cout << "perimeter"; //LINE 1

cout << perimeter; //LINE 2

• LINE 1 prints out the actual word perimeter and LINE 2 prints out the value held in the variable: perimeter.

• LINE 2 prints out the actual word perimeter and LINE 1 prints out the value held in the variable: perimeter.

• You do not need a semi-colon at the end of the two lines.

• The lines are identical.

Which of the following statements will read in THREE values from standard input (user typing it in) into variables named num1, num2, and num3 .

• cin>>num1>>num2>>num3;

• cin>>num1>>num2>>num3>>endl;

• cout<<num1<<num2<<num3<<endl;

• cin>>number1>>number2>>number3;

(True or False) The following two snippets of code have the same result.

cin >> x >> y;

cin >> x;

cin >> y;

• True

• False

Which of the following is an INVALID identifier?

• 1stplace

• _firstplace

• firstPlace

• place1

Which of these data types requires the least amount of memory?

• short

• double

• int

• float

To declare and initialize 3.14159 to a constant PI, which of the following is the correct syntax?

• const PI = 3.14159;

• const double 3.14159 = PI;

• const double PI = 3.14159;

• const int PI = 3.14159;

(T or F) The software development life cycle is a multi-stage process that includes the following items (in the following order):

* requirements specification

* system analysis

* system design

* implementation testing

* deployment

* maintenance

• True

• False