Question 1

What will be displayed after the following statements execute?
int num1 = 5;
int num2 = 3;
cout << "The result is " << (num1 * num2 + 10)  << endl;

Accepted Answer

A)   The result is 5 * 3 + 10
B)   The result is (num1 * num2 + 10) 
C)   The result is 25
D)   The result is 65
E)   None of theseF) None of the above
G) B) and D)

Question 2

Which of the following must be included in any program that uses the cin object?

Accepted Answer

A)   compiler
B)   the header file iostream
C)   linker
D)   brackets
E)   None of theseF) A) and E)
G) None of the above

Question 3

Which of the following functions will return the value of x, rounded to the nearest whole number?

Accepted Answer

A)   abs(x) 
B)   fmod(x) 
C)   sqrt(x) 
D)   round(x) 
E)   whole(x) F) C) and D)
G) A) and C)

Question 4

If you want to know the length of the string that is stored in a string object, you can call the object's size member function.

Accepted Answer

A) True 
 B)False

Question 5

The following statement will output $5.00 to the screen:
cout << setprecision(5) << dollars << endl;

Accepted Answer

A) True 
 B)False

Question 6

This manipulator forces cout to print digits in fixed-point notation:

Accepted Answer

A)   setprecision(2) 
B)   setw(2) 
C)   fixed
D)   setfixed(2) 
E)   None of theseF) A) and D)
G) B) and D)

Question 7

To use the rand() function, you must include the __________ header file?

Accepted Answer

A)   cstdlib
B)   cstring
C)   iostream
D)   cmath
E)   iomanipF) C) and E)
G) B) and D)

Question 8

Which line in the following program will cause a compiler error?
1 #include <iostream>
2 using namespace std;
3
4 int main() 
5 {
6  \quad const int MY_VAL = 77;
7  \quad MY_VAL = 99;
8  \quad cout \quad return 0;
10 }

Accepted Answer

A)   line 6
B)   line 7
C)   line 8
D)   line 9
E)   there will be no compiler error F) A) and C)
G) A) and D)

Question 9

In the following statement, what will be executed first according to the order of precedence?
Result = 6 - 3 * 2 + 7 - 10 / 2;

Accepted Answer

A)   6 - 3
B)   3 * 2
C)   2 + 7
D)   10 / 2
E)   7 - 10F) A) and E)
G) B) and E)

Question 10

How many characters will the following statement read into the variable myString?
Cin >> setw(10)  >> myString;

Accepted Answer

A)   9
B)   10
C)   11
D)   however many characters are in myString
E)   None of theseF) None of the above
G) C) and D)

Question 11

Which of the following will allow the user to input the values 15 and 20 and have them stored in variables named base and height, respectively?

Accepted Answer

A)   cin 
B)   cin base, height;
C)   cin >> base >> height;
D)   cin base >> cin height;
E)   None of theseF) None of the above
G) A) and D)

Question 12

When a program uses the setw manipulator, the iosetwidth header file must be included in a preprocessor directive.

Accepted Answer

A) True 
 B)False

Question 13

The fixed manipulator causes a number to be displayed in scientific notation.

Accepted Answer

A) True 
 B)False

Question 14

__________ reads a line of input, including leading and embedded spaces, and stores it in a string object.

Accepted Answer

A)   cin.get
B)   getline
C)   cin.getline
D)   get
E)   None of theseF) C) and E)
G) A) and D)

Question 15

Which of the following statements will pause the screen until the [Enter] key is pressed?

Accepted Answer

A)   cin;
B)   cin.getline() ;
C)   cin.get() ;
D)   cin.ignore() ;
E)   cin.input() ;F) B) and C)
G) All of the above

Question 16

The cin << statement will stop reading input when it encounters a newline character.

Accepted Answer

A) True 
 B)False

Question 17

A debugging process where you, the programmer, pretend you are a computer and step through each statement while recording the value of each variable at each step is known as

Accepted Answer

A)   error checking
B)   hand writing
C)   hand tracing
D)   error handling
E)   None of theseF) D) and E)
G) All of the above

Question 18

What is the value of x after the following code executes?
Int x = 0;
Int y = 5;
Int z = 4;
X = x + y + z * 2;

Accepted Answer

A)   18
B)   0
C)   13
D)   26
E)   unknownF) C) and D)
G) A) and B)

Question 19

When C++ is working with an operator, it strives to convert the operands to the same type.

Accepted Answer

A) True 
 B)False

Question 20

The __________ operator always follows the cin object, and the __________ operator follows the cout object.

Accepted Answer

A)   binary, unary
B)   conditional, binary
C)   >>, 
D)   >
E)   None of theseF) A) and C)
G) A) and D)

Exam 3: Expressions and Interactivity

A debugging process where you, the programmer, pretend you are a computer and step through each statement while recording the value of each variable at each step is known as

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Which of the following statements will pause the screen until the [Enter] key is pressed?

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What is the value of x after the following code executes? Int x = 0; Int y = 5; Int z = 4; X = x + y + z * 2;

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When a program uses the setw manipulator, the iosetwidth header file must be included in a preprocessor directive.

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The __________ operator always follows the cin object, and the __________ operator follows the cout object.

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In the following statement, what will be executed first according to the order of precedence? Result = 6 - 3 * 2 + 7 - 10 / 2;

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__________ reads a line of input, including leading and embedded spaces, and stores it in a string object.

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Which of the following functions will return the value of x, rounded to the nearest whole number?

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This manipulator forces cout to print digits in fixed-point notation:

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If you want to know the length of the string that is stored in a string object, you can call the object's size member function.

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What will be displayed after the following statements execute? int num1 = 5; int num2 = 3; cout << "The result is " << (num1 * num2 + 10) << endl;

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Which line in the following program will cause a compiler error? 1 #include <iostream> 2 using namespace std; 3 4 int main() 5 { 6 \quad const int MY_VAL = 77; 7 \quad MY_VAL = 99; 8 \quad cout << MY_VAL << endl; 9 \quad return 0; 10 }

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Which of the following must be included in any program that uses the cin object?

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The following statement will output $5.00 to the screen: cout << setprecision(5) << dollars << endl;

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The fixed manipulator causes a number to be displayed in scientific notation.

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How many characters will the following statement read into the variable myString? Cin >> setw(10) >> myString;

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Which of the following will allow the user to input the values 15 and 20 and have them stored in variables named base and height, respectively?

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When C++ is working with an operator, it strives to convert the operands to the same type.

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To use the rand() function, you must include the __________ header file?

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The cin << statement will stop reading input when it encounters a newline character.

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The operator always follows the cin object, and the operator follows the cout object.

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Which line in the following program will cause a compiler error? 1 #include <iostream> 2 using namespace std; 3 4 int main() 5 { 6 $\quad$ const int MY_VAL = 77; 7 $\quad$ MY_VAL = 99; 8 $\quad$ cout << MY_VAL << endl; 9 $\quad$ return 0; 10 }

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