Question 1

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 2

Assume that x is an int variable. What value is assigned to x after the following assignment statement is executed? x = -3 + 4 % 6 / 5;

Accepted Answer

A)   0
B)   1
C)   2
D)   -3
E)   None of theseF) B) and C)
G) A) and B)

Question 3

You want the user to enter the length, width, and height from the keyboard. Which cin statement is correctly written?

Accepted Answer

A) cin B) cin.get(length, width, height) ; C) cin >> length >> width >> height; D) cin >> length, width, height; E) cin << length; width; height;F) D) and E) G) B) and E) B

Question 4

This stream manipulator forces cout to print the digits in fixed-point notation.

Accepted Answer

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

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

The only difference between the get function and the >> operator is that get reads the first character typed, even if it is a space, tab, or the [Enter] key.

Accepted Answer

A) True 
 B)False

Question 7

In any program that uses the cin object, you must include the ___________.

Accepted Answer

A)   compiler
B)   iostream header file
C)   linker
D)   >> and 
E)   None of the aboveF) A) and B)
G) C) and D)

Question 8

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

Accepted Answer

A)   6
B)   8
C)   9
D)   7 E) C) and D)
F) B) and D) A

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

What is the value of average after the following code executes? double average;
Average = 1.0 + 2.0 + 3.0 / 3.0;

Accepted Answer

A)   2.0
B)   4.0
C)   1.5
D)   6.0E) None of the above
F) A) and C)

Question 11

This manipulator is used to establish a field width for the value immediately following it.

Accepted Answer

A)   field_width
B)   set_field
C)   setw
D)   iomanip
E)   None of the aboveF) A) and B)
G) All of the above

Question 12

Which statement is equivalent to the following? x = x * 2;

Accepted Answer

A)   x * 2;
B)   x *= 2;
C)   x = x * x;
D)   None of theseE) All of the above
F) A) and B)

Question 13

The function, pow(x, 5.0) , requires this header file.

Accepted Answer

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

Question 14

The statement cin >> setw(10)  >> str;
Will read up to this many characters into str.

Accepted Answer

A)   Nine
B)   Ten
C)   Eleven
D)   Eight
E)   None of theseF) B) and E)
G) All of the above

Question 15

You can use these to override the rules of operator precedence in a mathematical expression.

Accepted Answer

A)   [Brackets]
B)   (Parentheses) 
C)   {Braces}
D)   The escape character \
E)   None of theseF) A) and E)
G) B) and E)

Question 16

Which is true about the following statement? cout << setw(4)  << num4 << " ";

Accepted Answer

A)   It allows four spaces for the value in the variable num4.
B)   It outputs "setw(4) " before the value in the variable num4.
C)   It should use setw(10)  to output the value in the variable num10.
D)   It inputs up to four characters stored in the variable num4.
E)   None of theseF) C) and D)
G) A) and C)

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

When using the sqrt function you must include this header file.

Accepted Answer

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

Question 19

When this operator is used with string operands it concatenates them, or joins them together.

Accepted Answer

A)   &
B)   *
C)   %
D)   +
E)   None of the aboveF) B) and E)
G) A) and B)

Question 20

In C++, it is impossible to display the number 34.789 in a field of 9 spaces with 2 decimal places of precision.

Accepted Answer

A) True 
 B)False

Exam 3: Expressions and Interactivity

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

Correct Answer
verified

Assume that x is an int variable. What value is assigned to x after the following assignment statement is executed? x = -3 + 4 % 6 / 5;

Correct Answer
verified

You want the user to enter the length, width, and height from the keyboard. Which cin statement is correctly written?

Correct Answer
verified
B

This stream manipulator forces cout to print the digits in fixed-point notation.

Correct Answer
verified

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

Correct Answer
verified

The only difference between the get function and the >> operator is that get reads the first character typed, even if it is a space, tab, or the [Enter] key.

Correct Answer
verified

In any program that uses the cin object, you must include the ___________.

Correct Answer
verified

Correct Answer
verified
A

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

Correct Answer
verified

What is the value of average after the following code executes? double average; Average = 1.0 + 2.0 + 3.0 / 3.0;

Correct Answer
verified

This manipulator is used to establish a field width for the value immediately following it.

Correct Answer
verified

Which statement is equivalent to the following? x = x * 2;

Correct Answer
verified

The function, pow(x, 5.0) , requires this header file.

Correct Answer
verified
B

The statement cin >> setw(10) >> str; Will read up to this many characters into str.

Correct Answer
verified

You can use these to override the rules of operator precedence in a mathematical expression.

Correct Answer
verified

Which is true about the following statement? cout << setw(4) << num4 << " ";

Correct Answer
verified

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

Correct Answer
verified

When using the sqrt function you must include this header file.

Correct Answer
verified

When this operator is used with string operands it concatenates them, or joins them together.

Correct Answer
verified

In C++, it is impossible to display the number 34.789 in a field of 9 spaces with 2 decimal places of precision.

Correct Answer
verified

Exam 3: Expressions and Interactivity

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

Correct AnswerverifiedShow Answer

Assume that x is an int variable. What value is assigned to x after the following assignment statement is executed? x = -3 + 4 % 6 / 5;

Correct AnswerverifiedShow Answer

You want the user to enter the length, width, and height from the keyboard. Which cin statement is correctly written?

Correct AnswerverifiedB

This stream manipulator forces cout to print the digits in fixed-point notation.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The only difference between the get function and the >> operator is that get reads the first character typed, even if it is a space, tab, or the [Enter] key.

Correct AnswerverifiedShow Answer

In any program that uses the cin object, you must include the ___________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

What is the value of average after the following code executes? double average; Average = 1.0 + 2.0 + 3.0 / 3.0;

Correct AnswerverifiedShow Answer

This manipulator is used to establish a field width for the value immediately following it.

Correct AnswerverifiedShow Answer

Which statement is equivalent to the following? x = x * 2;

Correct AnswerverifiedShow Answer

The function, pow(x, 5.0) , requires this header file.

Correct AnswerverifiedB

The statement cin >> setw(10) >> str; Will read up to this many characters into str.

Correct AnswerverifiedShow Answer

You can use these to override the rules of operator precedence in a mathematical expression.

Correct AnswerverifiedShow Answer

Which is true about the following statement? cout << setw(4) << num4 << " ";

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When using the sqrt function you must include this header file.

Correct AnswerverifiedShow Answer

When this operator is used with string operands it concatenates them, or joins them together.

Correct AnswerverifiedShow Answer

In C++, it is impossible to display the number 34.789 in a field of 9 spaces with 2 decimal places of precision.

Correct AnswerverifiedShow Answer

Correct Answer
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B

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A

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B

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