FREE COMPUTER PROGRAMMING MCQs by General knowledge Solutions

FREE COMPUTER PROGRAMMING MCQs  by General knowledge Solutions

                                                                             

1. How do we declare an ‘interface’ class? 

a. By making all the methods pure virtual in a class 

b. By making all the methods abstract using the keyword ‘abstract’ in a class 

c. By declaring the class as interface with the keyword ‘interface’ 

d. It is not possible to create interface class in C++ 

2. How do we declare an abstract class? 

a. By providing at least one pure virtual method (function signature followed by ==0;) in a class 

b. By declaring at least one method abstract using the keyword ‘abstract’ in a class 

c. By declaring the class abstract with the keyword ‘abstract’ 

d. It is not possible to create abstract classes in C++ 

3. Which of the following is not an advantage of secondary memory 

a. It is cost-effective 

b. It has large storage capacity 

c. It has highest speed 

d. It is easily portable 

4. What happens when a pointer is deleted twice? 

a. It can abort the program 

b. It can cause a failure 

c. It can cause an error 

d. It can cause a trap 

5. Which of the following language feature is not an access specifier in C++? 

a. public 

b. private 

c. C protected 

d. internal 

6. Expression C=i++ causes 

a. Value of i assigned to C and then i incremented by 1 

b. i to be incremented by 1 and then value of i assigned to C 

c. Value of i assigned to C 

d. i to be incremented by 1 

7. The statement i++; is equivalent to 

a. i = i + i; 

b. i = i + 1; 

c. i = i - 1; 

d. i --; 

8. In C language, a hexadecimal number is represented by writing 

a. x 

b. xo 

c. ox 

d. h 

9. Which of the following library function below by default aborts the program? 

a. Terminate() 

b. end() 

c. Abort() 

d. exit() 

10. If a member needs to have unique value for all the objects of that same class, declare the member as 

a. Global variable outside class 

b. Local variable inside constructor 

c. Static variable inside class 

d. Dynamic variable inside class 

11. Value of ix+j, if i,j are integer type and ix long type would be 

a. integer 

b. float 

c. long integer 

d. double percision 

12. Which of the following below can perform conversions between pointers to related classes?

 a. A. cast_static 

 b. B. dynamic_cast c. 

 c. static_cast 

 d. D. cast_dynamic 

13. How do we define a constructor? 

a. a. x~() {} 

b. B. X() {}~ 

c. C. X() ~{} 

d. D. ~X() {} 

13. Vtables 

a. creates a static table per class 

b. creates a static table per object 

c. creates a dynamic table per class 

d. creates a dynamic table per object 

14. When class B is inherited from class A, what is the order in which the constructers of those classes are called 

a. Class A first Class B next 

b. Class B first Class A next 

c. Class B's only as it is the child class 

d. Class A's only as it is the parent class 

15. Which of the following is the most general exception handler that catches exception of any type? a. catch(std::exception) 

b. catch(std::any_exception) 

c. catch(…) 

d. catch() 

16. Which of the following is the most general exception handler that catches exception of ‘any type’? 

a. catch(std::exception) 

b. catch(std::any_exception) 

c. catch(…) 

d. catch() 

17. In a group of nested loops, which loop is executed the most number of times? 

a. the outermost loop 

b. the innermost loop 

c. all loops are executed the same number of times 

d. cannot be determined without knowing the size of the loops 

18. What is the Difference between struct and class in terms of Access Modifier? 

a. By default all the struct members are private while by default class members are public. 

b. By default all the struct members are protected while by default class members are private. 

c. By default all the struct members are public while by default class members are private. 

d. By default all the struct members are public while by default class members are protected. 

19. Inline functions are invoked at the time of 

a. Run time 

b. Compile time 

c. Depends on how it is invoked 

d. Both b and c above 

20. What is shallow copy? 

a. A shallow copy creates a copy of the dynamically allocated objects too. 

b. A shallow copy just copies the values of the data as they are. 

c. A shallow copy creates a copy of the statically allocated objects too 

d. Both b and c above 

21. What is deep copy? 

a. A deep copy creates a copy of the dynamically allocated objects too. 

b. A deep copy just copies the values of the data as they are. 

c. A deep copy creates a copy of the statically allocated objects too 

d. Both b and c above

22. Which of the following below is /are a valid iterator type? 

a. Input Iterator 

b. Backward Iterator 

c. Forward Iterator 

d. Both a and c above 

23. What defines a general set of operations that will be applied to various types of data? 

a. Template class 

b. Function template 

c. Class template 

d. Both a and c above 

24. Under which of the following circumstances, synchronization takes place? 

a. When the file is closed 

b. When the buffer is empty 

c. Explicitly, with manipulators 

d. both a and c 

25. Which of the following functions below can be used Allocate space for array in memory? 

a. calloc() 

b. malloc() 

c. Realloc() 

d. both a and b 

26. Statement scanf(“%d”,80); 

a. Assign an integer to variable i 

b. Give an error message 

c. Print the value of i 

d. Assign an float to variable i 

27. STL is based on which of the following programming paradigms? 

a. Structured Programming 

b. Object Oriented Programming (OOP) 

c. Functional Programming 

d. Aspect Oriented Programming (AOP) 

28. STL is based on which of the following programmingparadigms? 

a. Structured Programming 

b. Object Oriented Programming (OOP) 

c. Functional Programming 

d. Aspect Oriented Programming (AOP) 

29. If there is more than one statement in the block of a for loop, which of the following must be placed at the beginning and the ending of the loop block? 

a. parentheses ( ) 

b. braces { } 

c. brackets [ ]. 

d. arrows < > 

30. Which of the following members do get inherited but become private members in child class 

a. Public 

b. Private 

c. Protected 

d. All the above 

31. Which looping process is best used when the number of iterations is known? 

a. for 

b. while 

c. do-while 

d. all looping processes require that the iterations be known 

32. In a C language ‘3’ represents 

a. A digit 

b. An integer 

c. A character 

d. A word