Question 1

In addition to overloading, compilers often need to perform coercion or casting when the + symbol is used with mixed arithmetic.

Accepted Answer

This is true, compilers may need to perform coercion or casting when adding values of different types.

Question 2

Which of the following operators has the highest precedence?

Accepted Answer

The scope resolution operator (::) has the highest precedence among the given operators. This operator is used to access class methods and variables. The new operator is used for dynamically allocating memory, the % operator is used for computing the remainder after division, and the || operator is used for logical OR operations.

Question 3

C++ ____ you to use the built-in precedence rules for your class operators.

Accepted Answer

B

Question 4

To use the applyTransaction() function as a friend to both the Customer and the Transaction class, you must use the following syntax: ____.

Accepted Answer

The correct syntax for creating a friend function that has access to both the Customer and Transaction classes is to use the keyword "friend" before the function declaration and provide the function signature including both the Customer and Transaction class as arguments. Therefore, the correct syntax is "friend void applyTransaction(Customer, Transaction);" with option B being the closest match.

Question 5

When you overload the operator[]() function for a class, the parameter is required to be an integer.

Accepted Answer

The parameter for the operator[]() function can be of any type that makes sense for the class it is being overloaded for, not just an integer.

Question 6

The operator++() function overloads the ____ operator.

Accepted Answer

The operator++() function overloads the increment operator, which is represented by ++. This operator is used to increment the value of a variable by 1. Therefore, the best choice is A.

Question 7

The ____ operator has left-to-right associativity.

Accepted Answer

The -> operator is used for accessing a member of a structure or union through a pointer. It has left-to-right associativity which means that if there are multiple -> operators in an expression, they will be evaluated from left to right.

Question 8

The operator>>() function overloads the ____ operator.

Accepted Answer

The operator>>() function overloads the extraction operator, which is represented by the >> symbol. This operator is used for input operations in C++.

Question 9

The C++ friend relationship is always one-sided.

Accepted Answer

In C++, the friend relationship is one-sided because a class can declare another class or function as a friend, granting it access to its private and protected members, but the reverse is not automatically true unless explicitly declared.

Question 10

Which of the following operators has a different precedence than the others?

Accepted Answer

The :: operator has a higher precedence than the other three operators. It is used for scope resolution and allows accessing class, namespace, or enumeration members. The ++ operator is a unary operator used for incrementing, the [] operator is used for accessing elements of an array or container, and the . operator is used for accessing a member of a class or structure.

Question 11

To ____ operations is to allow several operators to be used within the same expression.

Accepted Answer

Chaining operators means combining them to work together within the same expression. For example, "2 + 3 * 4" is a chained expression, where the multiplication operator is evaluated before the addition operator. This is a common practice in programming languages, especially in math-related computations.

Question 12

The ____ operator is a binary operator.

Accepted Answer

The % operator is a binary operator that returns the remainder of a division operation. The other operators listed are not binary operators; ~ is a unary operator, ->* is a pointer-to-member operator, and ! is a logical negation operator.

Question 13

Which of the following operators has the lowest precedence?

Accepted Answer

The '&&' operator has the lowest precedence among the options given. Operator precedence determines the order in which operators are evaluated in expressions. The 'new' operator, scope resolution operator '::', and the range operator '..' (used in some languages) generally have higher precedence than logical operators like '&&'.

Question 14

The name of the function that overloads the + symbol is the ____ function.

Accepted Answer

According to C++ syntax, the correct way to overload the + operator is by defining a function with the signature: "returnType operator+(const parameterType& param)". Therefore, the correct name of the function that overloads the + symbol is "operator+()".

Question 15

The ____ operator is a unary operator.

Accepted Answer

The & operator is a unary operator because it operates on only one operand. It is a bitwise AND operator that performs AND operation on each pair of corresponding bits in the operands.

Question 16

____ is an example of overloading the prefix increment operator.

Accepted Answer

The correct syntax for overloading the prefix increment operator is to use the function signature "Inventory& operator++()". This function does not take any argument and increments the object by 1. The option A is not correct because it is for postfix increment operator. The options C and D are incorrect because they have invalid syntax.

Question 17

The ____ operator has right-to-left associativity.

Accepted Answer

The answer of The ____ operator has right-to-left associativity.
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Question 18

You are required to use the word friend within the function name of a friend function.

Accepted Answer

Friend functions in C++ do not require the word "friend" within the function name; the keyword "friend" is used in the class declaration to specify a non-member function that can access the private and protected members of the class.

Question 19

The = operator() function overloads the assignment operator.

Accepted Answer

The = operator cannot be overloaded using the operator() function. The correct way to overload the assignment operator is by defining an operator= function.

Question 20

The operator function overloads the ____ operator.

Accepted Answer

The insertion operator (<<) is overloaded by the operator function.

Quiz 9: Understanding Friends and Overloading Operators