Introduction To C Verified Test Bank Ch.2

Starting Out with C++ from Control Structures to Objects, 9e (Gaddis)

Chapter 2 Introduction to C++

TRUE/FALSE

1. The preprocessor reads a program before it is compiled and only executes those lines beginning with # symbol.

2. Because C++ is case-sensitive, all programs must have a function called main or Main.

3. In programming, the terms "line" and "statement" always mean the same thing.

4. In C++, key words are written in all lowercase letters.

5. The preprocessor executes after the compiler.

6. A value is stored in a variable with an assignment statement.

7. Programming style refers to the way a programmer uses elements such as identifiers, spaces, and blank lines.

8. When typing your source code into the computer, you should be careful since most of your C++ instructions, header files, and variable names are case sensitive.

9. In C++ you are required to name your variables so they indicate the purpose they will be used for.

10. Escape sequences are always stored internally as a single character.

11. Floating point constants are normally stored in memory as doubles.

12. C++ does not have a built-in data type for storing strings of data.

13. A named constant is like a variable, but it its content cannot be changed while the program is running.

14. C++ 11 introduced an alternative way to define variables, using the template key word and an initialization value.

MULTIPLE CHOICE

1. In a C++ program, two slash marks (//) indicate

2. A statement that starts with a hashtag (or pound) symbol (#) is called a

3. For every opening brace ({) in a C++ program, there must be a

4. The __________ is(are) used to display information on the computer's screen.

5. In the following statement, the characters Hello! are a(n)

cout << "Hello!";

6. The __________ causes the content of another file to be inserted into a program.

7. Which of the following must be included in any program that uses the cout object?

8. Character constants in C++ are always enclosed in

9. Every complete C++ program must have a

10. In a cout statement, which of the following will advance the output position to the beginning of the next line?

11. What will the following code display?

cout << "Monday";

cout << "Tuesday";

cout << "Wednesday";

12. What will the following code display?

int number = 23;

cout << "The number is " << "number" << endl;

13. What will the following code display?

cout << "Four\n" << "score\n";

cout << "and" << "\nseven";

cout << "\nyears" << " ago" << endl;

14. What will the following code display?

cout << "Roses " << "are red";

cout << "and " << "violets/n"

cout << "are" << "blue" << endl;

15. Which control sequence is used to skip over to the next horizontal tab stop?

16. A(n) __________ represents a storage location in the computer's memory.

17. Data items whose values do not change while the program is running are

18. A variable definition tells the computer

19. You must have a _____________ for every variable you intend to use in a program.

20. Which of the following is not a valid C++ identifier?

21. What will the following code display?

int x = 23, y = 34, z = 45;

cout << x << y << z << endl;

22. The numeric data types in C++ can be broken into two general categories which are

23. Besides the decimal number system that is most common (base 10), two other number systems that can be used in C++ programs are

24. A character literal is __________, whereas a string literal is __________

25. Which data type typically requires only one byte of storage?

26. In C++11, if you want an integer literal to be treated as a long long int, you can append __________ at the end of the number.

27. The data type used to declare variables that can hold real numbers is

28. The float data type is considered ___________ precision and the double data type is considered __________ precision.

29. Which of the following statements correctly assigns the character M to the variable named letter?

30. Which of the following lines must be included in a program that has string variables?

31. Assuming that a program has the following string object definition, which statement correctly assigns the string literal "Jane" to the string object?

string name;

32. In memory, C++ automatically places a(n) __________ at the end of string literals which __________.

33. Which of the following defines a double-precision floating-point variable named payCheck?

34. The data type of a variable whose value can be either true or false is

35. What will be the output after the following lines of code execute?

bool choice;

choice = true;

cout << "Your choice is " << choice << endl;

36. Using C++11: What data type does the compiler determine for the variable cost in the following statement?

auto cost = 14.95;

37. A variable's __________ is the part of the program that has access to the variable.

38. What is the value stored in the variable myNum after the following assignment statement executes?

myNum = 23 % 5

39. What is the value of cookies after the following statements execute?

int number = 38, children = 4, cookies;

cookies = number % children;

40. What is the value of number after the following statements execute?

int number;

number = 18 / 4;

41. What is the value of number after the following statements execute?

int number;

number = 18 % 4 + 2;

42. What is output of the following statement?

cout << 4 * (15 / (1 + 3)) << endl;

43. Which part of the following line is ignored by the compiler?

double userName = "janedoe"; // user's name is janedoe

44. A multi-line comment

45. Which of the following statements correctly defines a named constant named TAX_RATE that holds the value 0.075?

46. Given the following program, which line(s) cause(s) output to be displayed on the screen?

1 // This program displays my gross wages.

2 // I worked 40 hours and I make $20.00 per hour.

3 #include <iostream>

4 using namespace std;

5

6 int main()

7 {

8 int hours;

9 double payRate, grossPay;

10

11 hours = 40;

12 payRate = 20.0;

13 grossPay = hours * payRate;

14 cout << "My gross pay is $" << grossPay << endl;

15 return 0;

16 }

MULTIPLE RESPONSE

1. Select all that apply. Which of the following statements is(are) true about named constants?

2. Select all that apply. Using C++11: Which of the following can be used to initialize an integer variable named dozen with the value of 12?