Deck 2: Evaluating C Expressions

Question 1

____ is not a valid operator in C++.

A) &
B) %=
C) ++
D) =+

Answer 1

D

Question 2

You can isolate the last digit of a base-10 number by performing modulus with ____.

A) 1
B) 2
C) 10
D) 100

Answer 2

C

Question 3

When you use the += operator, you may insert a space between the + and the =.

Answer 3

False

Question 4

When an expression includes a(n) ____ operator, the mathematical operation takes place after the expression is evaluated.

A) prefix
B) postfix
C) unary
D) binary

Question 5

Multiplication, division, and modulus are said to have higher ____ than addition or subtraction.

A) priority
B) unifying factor
C) cast value
D) arithmetic precedence

Question 6

C++ provides ____ simple arithmetic operators for creating arithmetic expressions.

A) three
B) four
C) five
D) six

Question 7

The result of evaluating 3.0 / 4 + 2.2 is ____.

A) 2
B) 2.2
C) 2.95
D) 2.99

Question 8

When you mix data types in a binary arithmetic expression, the values on each side of the arithmetic operator are temporarily converted to a ____ type-the data type of the value that occupies more memory and to which all the types in the expression are converted.

A) unifying
B) standard
C) common
D) large

Question 9

The result of evaluating 3 / 4 + 2.2 is ____.

A) 2
B) 2.2
C) 2.95
D) 2.99

Question 10

The address operator (____) is a C++ unary operator that is not available for use in most other programming languages.

A) *
B) **
C) &
D) %

Question 11

When more than one arithmetic operator is included in an expression, then multiplication, division, and modulus operations always occur before addition or subtraction.

Question 12

When an expression includes a(n) ____ operator, the mathematical operation takes place before the expression is evaluated.

A) prefix
B) postfix
C) unary
D) binary

Question 13

The C++ modulus operator is ____.

A) &
B) #
C) !
D) %

Question 14

When two operations with the same precedence appear in an arithmetic expression, the operations are carried out in order from either left to right or right to left based on their ____.

A) associativity
B) precedence
C) unifying factor
D) modulus

Question 15

The modulus operator gives the remainder of integer division; it can be used only with integers.

Question 16

All precedence rules can be overridden with appropriately placed ____.

A) colons
B) semicolons
C) casts
D) parentheses

Question 17

All arithmetic operators are binary.

Question 18

The associativity of arithmetic operations (if there are no parentheses in the expression) is from right to left.

Question 19

To ____ a value is to transform it to another data type.

A) reduce
B) cast
C) convert
D) unify

Question 20

A(n) ____ is a digit added to a number (either at the end or at the beginning) that validates the authenticity of the number.

A) checksum
B) check digit
C) error detection code
D) CRC

Question 21

Consider the following line of C++ code:
float g = 2.0f, h = 4.4f, i = 12.8f, floatResult;
What is the purpose of the lowercase f's (e.g. 2.0 f )?

Question 22

A(n) ____________________ is a symbol that performs arithmetic.

Question 23

A(n) ____________________ is an operator that takes two operands, one on each side of the operator.

Question 24

A ____ expression is one that is interpreted to be true or false.

A) binary
B) mathematical
C) Boolean
D) unary

Question 25

____________________ are those that require only one operand.

Question 26

When you use ____________________ in front of a variable name, you refer to the memory address of that variable rather than the contents of the variable.

Question 27

Write the following operators in order of precedence, from highest to lowest:
float
int
doable
char
unsigned long
long double
long
short
unsigned int

Question 28

What is the hexadecimal numbering system? When is it typically used?

Question 29

Explain what the following statement means: "If you will use a calculated value later in a program, it is inefficient not to store it."

Question 30

Explain why using modulus with negative numbers can lead to unexpected results.

Question 31

What are the relational operators in C++?

Question 32

The expression cout 2); yields ____ as output.

A) 0
B) 1
C) true
D) false

Question 33

(4 - 4) = = 0 evaluates to ____.

A) 0
B) 1
C) true
D) false

Question 34

The unary operator ____ is the not operator; it means "the opposite of," and essentially reverses the true/false value of an expression.

A) !
B) &
C) %
D) $

Question 35

The two categories of shortcut arithmetic operators are ____________________ operators and increment and decrement operators.

Question 36

How can you perform an explicit cast?

Question 37

____ operators evaluate the relationship between operands; you use them with Boolean expressions.

A) Relational
B) Logical
C) Boolean
D) Mathematical

Question 38

A(n) ____________________ is a deliberate cast (as opposed to an automatic one).

Question 39

What should you keep in mind when dividing integers?

Question 40

!5 evaluates to ____.

A) -1
B) 0
C) 1
D) N/A

Question 44

What is a common C++ programming error when comparing two values in C++?

Question 46

What are static fields?