Futuresoft Placement Paper - Object-oriented programming (OOP) Questions

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1. What is the error in the following code?

   class t
   {
     virtual void print();
   }
       

   A: No error

   B: Function print() should be declared as static.

   C: Function print() should be defined.

   D: Class t should contain data members.

   Ans: A

2. It is possible to declare as a friend

   A: A member function

   B: A global function

   C: A class

   D: All of the above

   Ans: D

3. What is the output of the following code

   char symbol[3] = {'a', 'b', 'c'};
   for (int index = 0; index < 3; index++)
     cout << symbol[index];
       

   A: a b c

   B: "abc"

   C: abc

   D: 'abc'

   Ans: C

4. Identify the operator that is NOT used with pointers

   A: ->

   B: &

   C: *

   D: >>

   Ans: D

5. Overloading a postfix increment operator by means of a member function takes

   A: No argument

   B: One argument

   C: Two arguments

   D: Three arguments

   Ans: A

6. Which of the following is not the characteristic of constructor?

   A: They should be declared in the public section.

   B: They do not have return type.

   C: They cannot be inherited.

   D: They can be virtual.

   Ans: D

7. You separated a derived class name from its access specifier with

   A: A colon

   B: Two colons

   C: At least one space

   D: A semi colon

   Ans: B

8. The members of a class by default are

   A: Public

   B: Protected

   C: Private

   D: Mandatory to specify

   Ans: C

9. The type of value that a function sends back to the function that calls it is known as its _____

   A: type

   B: return value

   C: reference data

   D: sentinel

   Ans: B

10. Which of the following are never inherited?

    A: public data members

    B: constructor functions

    C: void functions

    D: overloaded + operators

    Ans: B

11. A function's purpose is to print customer data. Which of the following is the best name for this function?

    A: pcd(). It's short for "print customer data" and takes few keystrokes

    B: Printcustomerdata(). It states everything the function will do

    C: printCustomer(). It states the function's purpose and is easy to read

    D: lastFunction(). It is the final function called in most programs, and this name identifies the function's timing

    Ans: C

12. The function strcmp("Jose", "JOSE") will return _____

    A: -1

    B: 0

    C: 1

    D: null

    Ans: C

13. How many types of expressions in C++?

    A: 5

    B: 6

    C: 7

    D: 8

    Ans: C