Question 1

Which is true about the following statement?

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) C) and E)

Question 2

Which statement is equivalent to the following?
Number += 1;

Accepted Answer

A)  number = number + 1;
B)  number + 1;
C)  number = 1;
D)  None of theseE) B) and C)
F) A) and D)

Question 3

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 4

What will the value of x be after the following statements execute?

Accepted Answer

A)  13
B)  18
C)  0
D)  unknownE) None of the above
F) All of the above

Question 5

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 the aboveF) None of the above
G) A) and E)

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

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

Question 8

What is the value of average after the following code executes?

Accepted Answer

A)  2.0
B)  4.0
C)  1.5
D)  6.0E) A) and C)
F) B) and C)

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

Assume that x is an int variable. What value is assigned to x after the following assignment statement is executed?

Accepted Answer

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

Question 11

When converting some algebraic expressions to C++, you may need to insert ________ that do not appear in the algebraic expression.

Accepted Answer

A)  Parentheses
B)  Exponents
C)  Calculations
D)  Coercions
E)  None of the aboveF) D) and E)
G) B) and D)

Question 12

This manipulator causes the field to be left-justified with padding spaces printed to the right.

Accepted Answer

A)  left_justify
B)  right
C)  left
D)  left_pad
E)  None of theseF) A) and E)
G) A) and B)

Question 13

Which line in the following program will cause a compiler error?

Accepted Answer

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

Question 14

When the fixed manipulator is used, the value specified by the setprecision manipulator will be the number of digits to appear after the decimal point.

Accepted Answer

A) True 
 B)False

Question 15

Arithmetic operators that share the same precedence have right to left associativity.

Accepted Answer

A) True 
 B)False

Question 16

This function tells the cin object to skip one or more characters in the keyboard buffer.

Accepted Answer

A)  cin.ignore
B)  cin.jump
C)  cin.hop
D)  cin.skip;
E)  None of the aboveF) B) and C)
G) A) and E)

Question 17

Which line in the following program will cause a compiler error?

Accepted Answer

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

Question 18

When the final value of an expression is assigned to a variable, it will be converted to:

Accepted Answer

A)  The smallest C++ data type
B)  The largest C++ data type
C)  The data type of the variable
D)  The data type of the expression
E)  None of the aboveF) A) and D)
G) A) and E)

Question 19

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 C)
G) C) and E)

Question 20

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 D)
G) D) and E)

Exam 3: Expressions and Interactivity

Assume that x is an int variable. What value is assigned to x after the following assignment statement is executed?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which is true about the following statement?

Correct AnswerverifiedShow Answer

When the fixed manipulator is used, the value specified by the setprecision manipulator will be the number of digits to appear after the decimal point.

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

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

Which line in the following program will cause a compiler error?

Correct AnswerverifiedShow Answer

Which line in the following program will cause a compiler error?

Correct AnswerverifiedShow Answer

This function tells the cin object to skip one or more characters in the keyboard buffer.

Correct AnswerverifiedShow Answer

What is the value of average after the following code executes?

Correct AnswerverifiedShow Answer

When the final value of an expression is assigned to a variable, it will be converted to:

Correct AnswerverifiedShow Answer

What will the value of x be after the following statements execute?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which statement is equivalent to the following? Number += 1;

Correct AnswerverifiedShow Answer

Arithmetic operators that share the same precedence have right to left associativity.

Correct AnswerverifiedShow Answer

This manipulator causes the field to be left-justified with padding spaces printed to the right.

Correct AnswerverifiedShow Answer

When converting some algebraic expressions to C++, you may need to insert ________ that do not appear in the algebraic expression.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct Answer
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