CSCI 2010 MIDTERM CH 9, 11, 13 REVIEW
QUESTIONS
The _________ , also known as the address operator, returns the memory address of a
variable.
a. asterisk ( * )
b. ampersand ( & )
c. percent sign (%)
d. exclamation point ( ! )
e. None of these - Answers - B
With pointer variables, you can __________ manipulate data stored in other variables.
a. never
b. seldom
c. indirectly
d. All of these
e. None of these - Answers - C
The statement int *ptr;
has the same meaning as
a. int ptr;
b. *int ptr;
c. int ptr*;
d. int* ptr;
e. None of these - Answers - D
When you work with a dereferenced pointer, you are actually working with:
a. a variable whose memory has been deallocated
b. a copy of the value pointed to by the pointer variable
c. the actual value of the variable whose address is stored in the pointer variable
d. All of these
e. None of these - Answers - C
These can be used as pointers.
a. Array names
b. Numeric constants
c. Punctuation marks
d. All of these
e. None of these - Answers - A
The contents of pointer variables may be changed with mathematical statements that
perform:
a. all mathematical operations that are legal in C++
,b. multiplication and division
c. addition and subtraction
d. b and c
e. None of these - Answers - C
A pointer may be initialized with
a. the address of an existing object
b. the value of an integer variable
c. the value of a floating point variable
d. all of these
e. None of these - Answers - A
What does the following statement do?
double *num2;
a. Declares a double variable named num2.
b. Declares and initializes an pointer variable named num2.
c. Initializes a variable named *num2.
d. Declares a pointer variable named num2.
e. None of these - Answers - D
When the less than ( < ) operator is used between two pointer variables, the expression
is testing whether
a. the value pointed to by the first is less than the value pointed to by the second
b. the value pointed to by the first is greater than the value pointed to by the second
c. the address of the first variable comes before the address of the second variable in
the computer's memory
d. the first variable was declared before the second variable
e. None of these - Answers - C
Look at the following statement
This statement...
sum += *array++;
a. is illegal in C++
b. will always result in a compiler error
c. assigns the dereferenced pointer's value, then increments the pointer's address
d. increments the dereferenced pointer's value by one, then assigns that value
e. None of these - Answers - C
Use the delete operator only on pointers that were
a. never used
b. not correctly initialized
c. created with the new operator
d. dereferenced inappropriately
e. None of these - Answers - C
A function may return a pointer, but the programmer must ensure that the pointer
, a. still points to a valid object after the function ends
b. has not been assigned an address
c. was received as a parameter by the function
d. has not previously been returned by another function
e. None of these - Answers - A
Which of the following statements is not valid C++ code?
a. int ptr = &num1;
b. int ptr = int *num1;
c. float num1 = &ptr2;
d. All of these are valid
e. All of these are invalid - Answers - E
Which of the following statements deletes memory that has been dynamically allocated
for an array?
a. int array = delete memory;
b. int delete[ ];
c. delete [] array;
d. new array = delete;
e. None of these - Answers - C
When this is placed in front of a variable name, it returns the address of that variable.
a. asterisk ( * )
b. conditional operator
c. ampersand ( & )
d. semicolon ( ; )
e. None of these - Answers - C
What will the following statement output?
cout << &num1;
a. The value stored in the variable called num1.
b. The memory address of the variable called num1.
c. The number 1.
d. The string "&num1".
e. None of these - Answers - B
A pointer variable is designed to store
a. any legal C++ value
b. only floating-point values.
c. a memory address.
d. an integer.
e. None of these - Answers - C
Look at the following statement.int *ptr;
In this statement, what does the word int mean?
a. the variable named *ptr will store an integer value
QUESTIONS
The _________ , also known as the address operator, returns the memory address of a
variable.
a. asterisk ( * )
b. ampersand ( & )
c. percent sign (%)
d. exclamation point ( ! )
e. None of these - Answers - B
With pointer variables, you can __________ manipulate data stored in other variables.
a. never
b. seldom
c. indirectly
d. All of these
e. None of these - Answers - C
The statement int *ptr;
has the same meaning as
a. int ptr;
b. *int ptr;
c. int ptr*;
d. int* ptr;
e. None of these - Answers - D
When you work with a dereferenced pointer, you are actually working with:
a. a variable whose memory has been deallocated
b. a copy of the value pointed to by the pointer variable
c. the actual value of the variable whose address is stored in the pointer variable
d. All of these
e. None of these - Answers - C
These can be used as pointers.
a. Array names
b. Numeric constants
c. Punctuation marks
d. All of these
e. None of these - Answers - A
The contents of pointer variables may be changed with mathematical statements that
perform:
a. all mathematical operations that are legal in C++
,b. multiplication and division
c. addition and subtraction
d. b and c
e. None of these - Answers - C
A pointer may be initialized with
a. the address of an existing object
b. the value of an integer variable
c. the value of a floating point variable
d. all of these
e. None of these - Answers - A
What does the following statement do?
double *num2;
a. Declares a double variable named num2.
b. Declares and initializes an pointer variable named num2.
c. Initializes a variable named *num2.
d. Declares a pointer variable named num2.
e. None of these - Answers - D
When the less than ( < ) operator is used between two pointer variables, the expression
is testing whether
a. the value pointed to by the first is less than the value pointed to by the second
b. the value pointed to by the first is greater than the value pointed to by the second
c. the address of the first variable comes before the address of the second variable in
the computer's memory
d. the first variable was declared before the second variable
e. None of these - Answers - C
Look at the following statement
This statement...
sum += *array++;
a. is illegal in C++
b. will always result in a compiler error
c. assigns the dereferenced pointer's value, then increments the pointer's address
d. increments the dereferenced pointer's value by one, then assigns that value
e. None of these - Answers - C
Use the delete operator only on pointers that were
a. never used
b. not correctly initialized
c. created with the new operator
d. dereferenced inappropriately
e. None of these - Answers - C
A function may return a pointer, but the programmer must ensure that the pointer
, a. still points to a valid object after the function ends
b. has not been assigned an address
c. was received as a parameter by the function
d. has not previously been returned by another function
e. None of these - Answers - A
Which of the following statements is not valid C++ code?
a. int ptr = &num1;
b. int ptr = int *num1;
c. float num1 = &ptr2;
d. All of these are valid
e. All of these are invalid - Answers - E
Which of the following statements deletes memory that has been dynamically allocated
for an array?
a. int array = delete memory;
b. int delete[ ];
c. delete [] array;
d. new array = delete;
e. None of these - Answers - C
When this is placed in front of a variable name, it returns the address of that variable.
a. asterisk ( * )
b. conditional operator
c. ampersand ( & )
d. semicolon ( ; )
e. None of these - Answers - C
What will the following statement output?
cout << &num1;
a. The value stored in the variable called num1.
b. The memory address of the variable called num1.
c. The number 1.
d. The string "&num1".
e. None of these - Answers - B
A pointer variable is designed to store
a. any legal C++ value
b. only floating-point values.
c. a memory address.
d. an integer.
e. None of these - Answers - C
Look at the following statement.int *ptr;
In this statement, what does the word int mean?
a. the variable named *ptr will store an integer value
