C++ Deck 2

Question 1

What is an R-value?

Answer 1

The value that appears on the right-side operand of an assignment (=) operator.

For example, x = y has an R-value of y.

Question 2

What is an L-value?

Answer 2

L-values are variables that appear as the left operand for an assignment (=).

For example, x = y has an L-value of x.

At this point int he course, L-values are only storage locations.

Question 3

Is this a valid L-value: a+b = c

Answer 3

No. L-values can only be variables, they can’t contain operators.

Question 4

Associativity for the Assignment Operator (=)

Answer 4

right-to-left

Question 5

Which operator has the highest precedence of all the arithmetic operators?

Answer 5

• (Unary Minus)

Question 6

What is the associativity of: - (unary minus)

Answer 6

Right-to-left

Question 7

What is the associativity of +, -, *, and / arithmetic operators?

Answer 7

Left-to-right

Question 8

When the / (division) operator is used to divide two operands which are both integer values, what will the result always be?

Answer 8

An integer. Any fractional portion of the answer is discarded/truncated (and NOT rounded).

Question 9

True or False: The % (modulus) operator can be used and compiled in a program for non-integers.

Answer 9

False.

It must only be used for integers. Floating-point values with a modulus operator will not compile.

Question 10

True or False: The % (modulus) operator has the same precedence as * and / operators.

Answer 10

True

Question 11

What is the associativity of the % (modulus) operator?

Answer 11

Left-to-right

Question 12

What is the operator precedence order among all arithmetic operators from highest to lowest?

Answer 12

1. Parentheses and Unary Minus
2. Multiplicative: *, /, %
3. Additive: +, -
4. Operators on the same level associate left to right.

Question 13

What is the associativity of :: (Primary Scope Resolution)

Answer 13

left-to-right

Question 14

What is the associativity of:
(), [], . , ->, dynamic_cast, typeid
(Primary)

Answer 14

left to right

Question 15

What is the associativity of:
.* , ->*
(C++ Pointer to Member)

Answer 15

left-to-right

Question 16

What is the associativity of:
* , / , %
(Multiplicative)

Answer 16

Left-to-right

Question 17

What is the associativity of:
+ , -
(Additive)

Answer 17

Left-to-right

Question 18

What is the associativity of:
&laquo_space;,&raquo_space;
(Bitwise Shift, not to be confused with insertion or extraction)

Answer 18

Left-to-right

Question 19

What is the associativity of:
< , > , <= , >=
(Relational)

Answer 19

Left-to-right

Question 20

What is the associativity of:
== , !=
(Equality)

Answer 20

Left-to-right

Question 21

What is the associativity of:
&
(Bitwise AND)

Answer 21

Left-to-right

Question 22

What is the associativity of:

(Bitwise Exclusive OR)

Answer 22

Left-to-right

Question 23

What is the associativity of:
|
(Bitwise Inclusive OR)

Answer 23

Left-to-right

Question 24

What is the associativity of:
&&
(Logical AND)

Answer 24

Left-to-right

Question 25

What is the associativity of:
||
(Logical OR)

Answer 25

Left-to-right