Question

Multiple choice questions

1. A variable that is shared by all objects of a class is called_________?

A.Static variable

B. Const variable

C.Member variable

D. None of the above

2. Each object of a class has its own copy of the class's:

A. member functions

B. static member variables

C. instance member variables

D. A & C

E. A & B

3. In a vector, which of the following statements is true? (can have multiple answers)

a) Indexing vector access is range checked.

b) The range of legal index values for a vector is 0 to the value of v.size()-1

c) To add a value use the member function v.push_front( )

d) To manage size of reserve use v.reserve(newReserve)

e) To increase or decrease a vector’s size v.new_size(newSize);

4. Which statement is true about strings and c-string?

A. A string is a class and a c-string is created with an array

B. A c-string is a class and a string is created with an array

c. A c-string has a member function to get the size

d. A string is created with vectors and c-string is created with arrays

e. None of these

5. Which one of the following statements declares a c-string variable?

a.char c;

b. string s;

c. char c[10];

d.string s[10];

6. ________________ function returns the uppercase version of expression.

a. tolower(expression);

b. upper(expression)

c. toupper(expression);

d. isupper(expression);

7. Which of the following creates a string object with data ‘csci-1410’?

a. string str;

b. string ‘csci-1410’;

c. string s("csci-1410");

d. string s(csci-1410);

8. When a member function is defined (or implemented) outside of the class declaration, the function name must be qualified with the:

a.private access specifier

b.class name, followed by a single semicolon (:)

c.name of the first object

d.class name, followed by the scope resolution operator (::)

e.None of these

9.The value of a class type is called ________.

a.Regular variable

b.Object instance or object

c.Pointer variable

d.All of the above

e.None of the above

10.Which statement correctly defines a vector object for holding Dealer objects?

a.Dealer vector v;

b.Dealer<vector> v;

c.vector<Dealer> v;

d.vector v<Dealer>;

11.One of the following statements defines an array of strings having size SIZE.

a.string array;

b.string [SIZE]array;

c.string array[SIZE];

d.string *array;

12. One of the following statements dynamically allocates an array of floats having size SIZE.

a.float array;

b.float *array[SIZE];

c.float array = new float[SIZE];

d.float *array = new float[SIZE];

13. Which of the following statements declare two-dimensional array?

a.int a[];

b.int a[5][6];

c.int a[][];

d.int a[][4];

e.None of the above

Answer 1

Question 1) Answer Option A

Reason: Option A is correct because a static variable is a variable whose one copy is created and is used by all the class members. This variable will be shared among all the instance of the class.

Option B is incorrect because a constant variable is a variable whose value will not be shared once it is declared

Option C is incorrect because it is an instance variable or an object which is created with the new keyword.

Question 2) Answer Option C

Reason: Option A is incorrect because a member function is not a single copy of the class.

Option B is incorrect because a static member variable will remain same throughout the program.

Option C is correct because a member variable is an instance of the class which is a copy of its class.

Question 3) Answer Option B, C

Reason: Option A is incorrect because indexing vector access is not range checked.

Option B is correct because the range of the vector starts from 0 untill 1 less than the total range.

Option C is correct because v.push_front( ) is used to push a value in the front of a list.

Option D is incorrect because it is not used for managing the size of reserve.

Option E is incorrect because it is used to change the size of unordered list.

Option E is incorrect because