COMPUTER PROGRAMMING MCQs by General knowledge Solutions

COMPUTER PROGRAMMING MCQs  by General knowledge Solutions

1. If the class name is X, what is the type of its “this” pointer (in a nonstatic, non-const member function)?

 a. const X* const 

 b. X* const 

 c. X* 

 d. X& 

2. Which classes allow primitive types to be accessed as objects? 

a. Storage 

b. Virtual 

c. Friend 

d. Wrapper 

3. When is std::bad_alloc exception thrown? 

a. When new operator cannot allocate memory 

b. When alloc function fails 

c. When type requested for new operation is considered bad, thisexception is thrown 

d. When delete operator cannot delete teh allocated (corrupted) object 

4. Which one of the following is not a fundamental data type in C++ 

a. float 

b. string 

c. int 

d. wchar_t 

5. Which of the following is a valid destructor of the class name "Country" 

a. int ~Country() 

b. void Country() 

c. int ~Country(Country obj) 

d. void ~Country() 

6. Which of the following correctly describes C++ language? 

a. Statically typed language 

b. Dynamically typed language 

c. Both Statically and dynamically typed language 

d. Type-less language 

7. Which of the following keyword supports dynamic method resolution? 

a. abstract 

b. Virtual 

c. Dynamic 

d. Typeid 

8. Which of the following is the most preferred way of throwing and handling exceptions? 

a. Throw by value and catch by reference. 

b. Throw by reference and catch by reference. 

c. Throw by value and catch by value 

d. Throw the pointer value and provide catch for teh pointer type. 

9. Which of the following is not true about preprocessor directives 

a. They begin with a hash symbol 

b. They are processed by a preprocessor 

c. They form an integral part of the code 

d. They have to end with a semi colon 

10. What's wrong? while( (i < 10) && (i > 24)) 

a. the logical operator && cannot be used in a test condition 

b. the while loop is an exit-condition loop 

c. the test condition is always false 

d. the test condition is always true 

11. A continue statement causes execution to skip to 

a. the return 0; statement 

b. the first statement after the loop 

c. the statement following the continue statement 

d. the next iteration of the loop 

12. What's wrong? (x = 4 && y = 5) ? (a = 5) ; (b = 6); 

a. the question mark should be an equal sign 

b. the first semicolon should be a colon 

c. there are too many variables in the statement 

d. the conditional operator is only used with apstrings 

13. What's wrong? for (int k = 2, k <=12, k++) 

a. the increment should always be ++k 

b. the variable must always be the letter i when using a for loop 

c. there should be a semicolon at the end of the statement 

d. the commas should be semicolons 

14. Which of the following is not recommended in a header file? 

a. Type definitions (typedefs) 

b. Class definitions 

c. Function definitions 

d. Template definitions 

15. Which of the STL containers store the elements contiguously (in adjecent memory locations)? 

a. std::vector 

b. std::list 

c. std::map 

d. std::set 

16. Which of the following is not a standard exception built in C++. 

a. std::bad_creat 

b. std::bad_alloc 

c. std::bad_cast 

d. std::bad_typeid 

17. What does STL stand for? 

a. Simple Template Library 

b. Standard Template Library 

c. Static Type Library 

d. Single Type-based Library 

18. What is the difference between overloaded functions and overridden functions? 

a. Overloading is a dynamic or run-time binding and Overriding is static or compile-time binding 

b. Redefining a function in a friend class is called function overriding while Redefining a function in       a derived class is called a overloaded fucntion.

c. Overloading is a static or compile-time binding and Overriding is dynamic or run-time binding 

d. Redefining a function in a friend class is called function overloading while Redefining a function in a derived class is called as overridden fucnion. 

19. Which one of the following is not a valid reserved keyword in C++ 

a. Explicit 

b. Public 

c. Implicit 

d. Private 

20. Each pass through a loop is called a/an 

a. enumeration 

b. iteration 

c. culmination 

d. pass through 

21. Which of the following is true about const member functions? 

a. const members can be invoked on both const as well as nonconst objects 

b. const members can be invoked only on const objects and not on nonconst objects 

c. nonconst members can be invoked on const objects as well as nonconst objects 

d. none of the above 

22. Which of the following relationship is known as inheritancerelationship? 

a. ‘has-a’ relationship 

b. ‘is-a’ relationship 

c. association relationship 

d. none of the above 

23. If class A is friend of class B and if class B is friend of class C, which of the following is true? 

a. Class C is friend of class A 

b. Class A is friend of class C 

c. Class A and Class C do not have any friend relationship

d. None of the above 

24. A direct access file is: 

a. A file in which recoreds are arranged in a way they are inserted in a file 

b. A file in which records are arranged in a particular order 

c. Files which are stored on a direct access storage medium 

d. None of the above 

25. Which of the following is not a component of file system 

a. Access method 

b. Auxiliary storage management 

c. Free integrity mechanism 

d. None of the above 

26. Seek time is 

a. time taken to retrieve a dta 

b. Time taken by read/write head mechanism to position itself over appropriate cylinder 

c. Time taken by appropriate sector to come under read/write 

d. None of the above 

27. ‘Prime area’ in context of file system is defined as 

a. It is memory area created by operating system 

b. It is an area into which data records are written 

c. It is the main area of a web page 

d. None of the above 

28. In mulit-list organization 

a. Records that have equivalent value for a given secondary index item are linked together to form a         list. 

b. Records are loaded in ordered sequence defined by collating sequence by content of the key 

c. Records are directly accessed by record key field 

d. None of the above 

29. Which of the following is/are advantages of cellular partitioned structure: 

a. Simultaneous read operations can be overlapped

b. Search time is reduced 

c. Both a & b 

d. None of the above 

30. *ptr++ is equivalenet to: 

a. ptr++ 

b. *ptr 

c. ++*ptr 

d. None of the above