1. What symbol indicates that the following line is a comment?
Answer: // (or /*)
2. What are the two kinds of statements inside a function?
Answer: Declaration statements and executable statements.
3. What does the following statement do?
cout << “This is good.”;
Answer: It displays the words "This is good" on the screen.
4. What C++ word is used to read information in from the keyboard?
Answer: cin
5. What is the name for a word that has a specific meaning in C++?
Answer: Reserved word (or keyword)
6. What is an identifier?
Answer: A name for the data elements used in a program.
7. What would be the best choice for the data type for a person’s middle initial?
Answer: char
8. What would be the best choice for the data type for the distance between two houses?
Answer: float (or double or long double)
9. Write the following number in normal decimal notation: 734E-4
Answer: 0.0734
10. What is the escape sequence for a linefeed?
Answer: ‘\n’
11. What is the following kind of statement called?
int counter;
Answer: A variable declaration.
12. If the variables name and color contain these values: name color “Elmo” “red”
write a statement using these variables that will output: Elmo, the puppet, is red!
Answer: cout << name << “, the puppet, is “ << color << “!”;
13. What is a prompt?
Answer: An output statement that informs the user what to enter.
14. What is the output of the following code segment if the data entered are 3, 2 and 4?
int x, y, z;
cout << “Enter three numbers: “;
cin >> x >> y >> z;
y = x + z;
x = z + 1;
cout << x << “ “ << y<< “ “ << z;
Answer: 5 7 4
15. Why do programmers use comments?
Answer: To help others read and understand the program.
16. What is the result of the following arithmetic expression?
5 + 7/3
Answer: 7
17. What is the result of the following arithmetic expression?
7 – 2 * (4 + 1)
Answer: -3
18. Write the following statement in C++: a = 2bc3
Answer: a = 2 * b * c * c * c
19. If data is being read from a file for a program in batch mode, a prompt is replaced with what?
Answer: An echo.
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