Chapter 2 practice exam C++
What is the value of cookies after the execution of the following statements? int number = 38, children = 4, cookies; cookies = number % children; A) 2 B) 0 C) 9 D) .5 E) None of these
Answer: A
) In C++ 11, the ________ tells the compiler to determine the variable's data type from the initialization value. A) auto key word B) #include preprocessor directive C) variable's name D) dynamic_cast key word E) None of the above
Answer: A
In programming terms, a group of characters inside a set of quotation marks is called a(n): A) String literal B) Variable C) Operation D) Statement E) None of the above
Answer: A
The float data type is considered ________ precision, and the double data type is considered ________ precision. A) single, double B) float, double C) integer, double D) short, long E) None of the above
Answer: A
These are data items whose values do not change while the program is running. A) Literals B) Variables C) Comments D) Integers E) None of the above
Answer: A
What will the following code display? cout << "Four\n" << "score\n"; cout << "and" << "\nseven"; cout << "\nyears" << " ago" << endl; A) Four score and seven years ago B) Four score and seven years ago C) Four score and seven years ago D) Four score and seven years ago
Answer: A
What will the value of x be after the following statements execute? int x; x = 18.0 / 4; A) 4.5 B) 4 C) 0 D) unknown
Answer: A
1) In a C++ program, two slash marks ( // ) indicate: A) The end of a statement B) The beginning of a comment C) The end of the program D) The beginning of a block of code E) None of the above
Answer: B
A variable whose value can be either true or false is of this data type. A) binary B) bool C) T/F D) float E) None of the above
Answer: B
Assume that a program has the following string object definition: string name; Which of the following statements correctly assigns a string literal to the string object? A) name = Jane; B) name = "Jane"; C) name = 'Jane'; D) name = (Jane);
Answer: B
Besides decimal, two other number systems you might encounter in C++ programs are: A) Octal and Fractal B) Hexadecimal and Octal C) Unary and Quaternary D) Base 7 and Base 9 E) None of the above
Answer: B
Every complete C++ program must have a ________. A) comment B) function named main C) preprocessor directive D) symbolic constant E) cout statement
Answer: B
If you use a C++ key word as an identifier, your program will: A) Execute with unpredictable results B) not compile C) understand the difference and run without problems D) Compile, link, but not execute E) None of the above
Answer: B
This is used to mark the end of a complete C++ programming statement. A) Pound Sign B) Semicolon C) Data type D) Void E) None of the above
Answer: B
What is the output of the following statement? cout << 4 * (15 / (1 + 3)) << endl; A) 15 B) 12 C) 63 D) 72 E) None of these
Answer: B
What will the following code display? int number = 7; cout << "The number is " << "number" << endl; A) The number is 7 B) The number is number C) The number is7 D) The number is 0
Answer: B
What will the value of x be after the following statements execute? int x; x = 18 / 4; A) 4.5 B) 4 C) 0 D) unknown
Answer: B
Which of the following defines a double-precision floating point variable named payCheck? A) float payCheck; B) double payCheck; C) payCheck double; D) Double payCheck;
Answer: B
Which one of the following would be an illegal variable name? A) dayOfWeek B) 3dGraph C) _employee_num D) June1997 E) itemsorderedforthemonth
Answer: B
You must have a ________ for every variable you intend to use in a program. A) purpose B) definition C) comment D) constant E) None of the above
Answer: B
________ must be included in any program that uses the cout object. A) Opening and closing braces B) The header file iostream C) Comments D) Escape sequences E) None of the above
Answer: B
________ represent storage locations in the computer's memory. A) Literals B) Variables C) Comments D) Integers E) None of the above
Answer: B
) A statement that starts with a # symbol is called a: A) Comment B) Function C) Preprocessor directive D) Key word E) None of the above
Answer: C
A variable's ________ is the part of the program that has access to the variable. A) data type B) value C) scope D) reach E) None of the above
Answer: C
Assume that a program has the following variable definition: char letter; Which of the following statements correctly assigns the character Z to the variable? A) letter = Z; B) letter = "Z"; C) letter = 'Z'; D) letter = (Z);
Answer: C
Assuming you are using a system with 1-byte characters, how many bytes of memory will the following string literal occupy? "William" A) 7 B) 14 C) 8 D) 1
Answer: C
Character constants in C++ are always enclosed in ________. A) [brackets] B) "double quotation marks" C) 'single quotation marks' D) {braces} E) (parentheses)
Answer: C
In memory, C++ automatically places a ________ at the end of string literals. A) Semicolon B) Quotation marks C) Null terminator D) Newline escape sequence E) None of the above
Answer: C
Look at the following program and answer the question that follows it. 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 } Which line(s) in this program cause output to be displayed on the screen? A) 13 and 14 B) 8 and 9 C) 14 D) 13 E) 15
Answer: C
The ________ is/are used to display information on the computer's screen. A) Opening and closing braces B) Opening and closing quotation marks C) cout object D) Backslash E) None of the above
Answer: C
The numeric data types in C++ can be broken into two general categories: A) numbers and characters B) singles and doubles C) integer and floating point D) real and unreal E) None of the above
Answer: C
These are used to declare variables that can hold real numbers. A) Integer data types B) Real data types C) Floating point data types D) Long data types E) None of the above
Answer: C
This control sequence is used to skip over to the next horizontal tab stop. A) \n B) \h C) \t D) \a E) \'
Answer: C
What will the following code display? cout << "Four " << "score "; cout << "and " << "seven/n"; cout << "years" << "ago" << endl; A) Four score and seven yearsago B) Four score and seven years ago C) Four score and seven/nyearsago D) Four score and seven yearsago
Answer: C
What will the following code display? cout << "Monday"; cout << "Tuesday"; cout << "Wednesday"; A) Monday Tuesday Wednesday B) Monday Tuesday Wednesday C) MondayTuesdayWednesday D) "Monday" "Tuesday" "Wednesday"
Answer: C
What will the value of x be after the following statements execute? int x; x = 18 % 4; A) 0.45 B) 4 C) 2 D) unknown
Answer: C
Which character signifies the beginning of an escape sequence? A) // B) / C) \ D) # E) {
Answer: C
A character literal is enclosed in ________ quotation marks, whereas a string literal is enclosed in ________ quotation marks. A) double, single B) triple, double C) open, closed D) single, double E) None of the above
Answer: D
For every opening brace in a C++ program, there must be a: A) String literal B) Function C) Variable D) Closing brace E) None of the above
Answer: D
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. A) L B) <INT> C) I D) LL E) None of the above
Answer: D
The ________ causes the contents of another file to be inserted into a program. A) Backslash B) Pound sign C) Semicolon D) #include directive E) None of the above
Answer: D
The first step in using the string class is to #include the ________ header file. A) iostream B) cctype C) cmath D) string E) None of the above
Answer: D
What is the modulus operator? A) + B) * C) & D) % E) ||
Answer: D
What will the following code display? cout << "Four" << "score" << endl; cout << "and" << "seven" << endl; cout << "years" << "ago" << endl; A) Four score and seven years ago B) Four score and seven years ago C) Fourscoreandsevenyearsago D) Fourscore andseven yearsago
Answer: D
What will the following code display? int x = 0, y = 1, z = 2; cout << x << y << z << endl; A) 0 1 2 B) 0 1 2 C) xyz D) 012
Answer: D
Which data type typically requires only one byte of storage? A) short B) int C) float D) char E) double
Answer: D
Which of the following correctly consolidates the following declaration statements into one statement? int x = 7; int y = 16; int z = 28; A) int x = 7; y = 16; z = 28; B) int x = 7 y = 16 z = 28; C) int x, y, z = 7, 16, 28 D) int x = 7, y = 16, z = 28; E) None of these will work.
Answer: D
Of the following, which is a valid C++ identifier? A) June1997 B) _employee_number C) ___department D) myExtraLongVariableName E) All of the above are valid identifiers.
Answer: E
This function in C++ allows you to identify how many bytes of storage on your computer system an integer data value requires. A) len B) bytes C) f(x) D) int E) sizeof
Answer: E
Which escape sequence causes the cursor to move to the beginning of the current line? A) \n B) \t C) \a D) \b E) \r
Answer: E