Question 1

The following two statements will assign the same value to result.
result = a + b * c;
result = b * c + a;

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A)   values, exponents
B)   operators, calculations
C)   operators, operands
D)   operators, parentheses
E)   operands, parenthesesF) A) and D)
G) A) and C)

Question 3

The ________ object causes data to be input from the keyboard.

Accepted Answer

A)   cin
B)   cout
C)   keyboard buffer
D)   standard input
E)   dataInF) B) and D)
G) B) and E)

Question 4

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

Accepted Answer

A)   the iostream header file.
B)   the fstream header file.
C)   >> and 
D)   named constants.
E)   none of the above.F) All of the above
G) A) and B)

Question 5

The following 4 lines of C++ code, use strings. string firstName; // Define a string object
Char lastName[7]; // Define a C-string
FirstName = "Abraham"; // Assign a value to the string object
LastName = "Lincoln"; // Assign a value to the C-string
Which of the following statements is /are True?

Accepted Answer

A)   The string object is defined incorrectly because no size is given for it.
B)   The 2 string definitions are correct, but the 2 assignment statements are wrong.
C)   The string object is assigned a value correctly, but the C-string is not.
D)   The C-string is assigned a value correctly, but the string object is not.
E)   All 4 lines of code are correct.F) A) and E)
G) A) and D)

Question 6

________ causes a program to wait until information is typed at the keyboard and the Enter key is pressed.

Accepted Answer

A)   An input device
B)   The cin object
C)   The cout object
D)   A preprocessor
E)   NothingF) None of the above
G) A) and B)

Question 7

________ can be used to override the rules of operator precedence.

Accepted Answer

A)   Some operators
B)   Parentheses
C)   Operands
D)   Associativity
E)   NothingF) None of the above
G) A) and C)

Question 8

Operator associativity is either left to right or

Accepted Answer

A)   top to bottom.
B)   front to back.
C)   right to left.
D)   inside to outside.
E)   nothing else; it is always left to right.F) A) and D)
G) B) and E)

Question 9

The following pair of C++ statements will cause 3.5 to be output.
double number = 7 / 2;
cout << number;

Accepted Answer

A) True 
 B)False

Question 10

The statement cout << setw(4)  << num4 << " ";

Accepted Answer

A)   outputs the value of num4 rounded to 4 decimal places.
B)   outputs "setw(4) " before the value in the variable num4.
C)   outputs the first 4 digits of the number stored in num4.
D)   outputs the value stored in num4 four times.
E)   does none of above.F) A) and E)
G) B) and D)

Question 11

Which of the following statements about named constants is/are True?

Accepted Answer

A)   A named constant must be initialized with a value at the time it is declared.
B)   The identifier name of a named constant can only contain capital letters and underscores.
C)   The initial value of a named constant, cannot be changed during the program execution.
D)   All 3 of the above statements are True.
E)   Statements A and C are True, but B is not.F) B) and C)
G) A) and E)

Question 12

The ________ stream manipulator can be used to establish a field width for the value immediately following it.

Accepted Answer

A)   cin
B)   setField
C)   setw
D)   iomanip
E)   widthF) C) and D)
G) B) and C)

Question 13

Which of the following expressions will evaluate to 2.5?

Accepted Answer

A) static_cast(5/2) B) static_cast(5) /2 C) 5/static_cast(2) D) All three of the above E) Both B and C, but not AF) C) and D) G) A) and B)

Question 14

When an operator has two operands of different data types, C++ always converts them both to double before performing the operation.

Accepted Answer

A) True 
 B)False

Question 15

The following statement sets sum1, sum2, and sum3 all to zero.
sum1 = sum2 = sum3 = 0;

Accepted Answer

A) True 
 B)False

Question 16

When an arithmetic expression contains two or more different operators, such as * and +, the order in which the operations is done is determined by

Accepted Answer

A)   left to right order.
B)   operator precedence.
C)   operator associativity.
D)   the programmer.
E)   the compiler.F) A) and B)
G) A) and C)

Question 17

The following two expressions evaluate to the same thing:
c + a * b
c + (a * b)

Accepted Answer

A) True 
 B)False

Question 18

Which of the following statements doubles the value stored in answer?

Accepted Answer

A)   answer += 2;
B)   answer *= 2;
C)   answer = answer * 2;
D)   All three of the above
E)   Both B and C, but not AF) A) and C)
G) C) and D)

Question 19

The only difference between C-strings and string objects is how they are declared and internally stored. They are used exactly the same way.

Accepted Answer

A) True 
 B)False

Question 20

The following statement number = rand()  % 5 + 10;
Assigns number a value in the range of

Accepted Answer

A)   5 - 10
B)   0 - 15
C)   5 - 15
D)   10 - 15
E)   none of the above.F) C) and E)
G) A) and D)

Exam 3: Expressions and Interactivity

The following statement sets sum1, sum2, and sum3 all to zero. sum1 = sum2 = sum3 = 0;

Correct AnswerverifiedShow Answer

The following two statements will assign the same value to result. result = a + b * c; result = b * c + a;

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When an arithmetic expression contains two or more different operators, such as * and +, the order in which the operations is done is determined by

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Which of the following statements about named constants is/are True?

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The following 4 lines of C++ code, use strings. string firstName; // Define a string object Char lastName[7]; // Define a C-string FirstName = "Abraham"; // Assign a value to the string object LastName = "Lincoln"; // Assign a value to the C-string Which of the following statements is /are True?

Correct AnswerverifiedShow Answer

Operator associativity is either left to right or

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________ causes a program to wait until information is typed at the keyboard and the Enter key is pressed.

Correct AnswerverifiedShow Answer

________ can be used to override the rules of operator precedence.

Correct AnswerverifiedShow Answer

The following statement number = rand() % 5 + 10; Assigns number a value in the range of

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Which of the following statements doubles the value stored in answer?

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

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The following two expressions evaluate to the same thing: c + a * b c + (a * b)

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The following pair of C++ statements will cause 3.5 to be output. double number = 7 / 2; cout << number;

Correct AnswerverifiedShow Answer

The only difference between C-strings and string objects is how they are declared and internally stored. They are used exactly the same way.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The statement cout << setw(4) << num4 << " ";

Correct AnswerverifiedShow Answer

When an operator has two operands of different data types, C++ always converts them both to double before performing the operation.

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The ________ stream manipulator can be used to establish a field width for the value immediately following it.

Correct AnswerverifiedShow Answer

The ________ object causes data to be input from the keyboard.

Correct AnswerverifiedShow Answer

Which of the following expressions will evaluate to 2.5?

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

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