1. C ++ MULTIPLE CHOICE QUESTION

2. Check your Knowledge
Press to Start

3. 1. In a linked list: 1) Each link contains a pointer to next link 2) Each link contains data 3) An array of pointer to the next links 4) The link is stored in a array
2;4
1;2
1;3
3;4

4. 2. If you wanted to sort so many large objects or structure, it would be most efficient to:
Place them in a array and sort the array
Place pointers to them and then sort the array
Placed them in a link list and sort the link list
Place reference to them in an array and then sort them

5. 3. Virtual function allows you to:
Create an array of type pointer-to-base class that can hold pointer to derived class
Create function that have no body
Group the object of different class
Use the same function call to execute the member function from different class

6. 4. A pointer to be a base class can point to object of derived class.
True
False

7. Late binding or dynamic binding
5. Deciding after a program start to execute what function will be executed by a particular function call statement, is called
Late binding
Dynamic binding
Late binding or dynamic binding
None of these

8. 6. A pure virtual function is a virtual functions that: (Choose all that apply) 1) Has no body 2) Is used in a base class 3) Returns nothing 4) Take no arguments
2;4
1;4
2;3
1;2

9. 7. A virtual base function is useful when:
Different base function in base and derived classes have the same name
There are multiple paths from the one derived class to another
The identification of a function in base class is ambiguous
It make sense to use base class with no body

10. 8. A friend function can be used to: (Choose all that apply) 1) Avoid arguments between classes 2) Allow access to class whose source code is unavailable 3) Allow one class to access unrelated class 4) Increase the versatility of an overloaded function
1;2
1;3
3;4
2;4

11. 9. The keyword friend does not appear in: (Choose all that apply)
The class allowing access to another class
The class desiring access to another class
The private section of a class
The public section of a class

12. 10. A static function: Should be called when an object is destroyed
Is closely connected with an individual object for a class
Can be called using the class name and function name
Is used when a dummy object must be created

13. 11. An assignment operator can not be overloaded to:
Help keep track of the number of identical object
Assign a separate id onto each object
Ensure that all member data is copied exactly
Signal when assignment takes place

14. 12. The user must always define the operation of the copy constructor
True
False

15. 13. The operation of the assignment operator and that of the copy constructor are: (Choose two options) 1) Similar, except that the copy constructor create the new object 2) Similar, except that the assignment operator copies member data 3) Different, except that they both create a new object 4) Different , except that they both copy member data
1;2
1;4
2;3
3;4

16. 14. A copy constructor could be defined to copy only part of an object data
True
False

17. 15. The lifetime of a variable that is defined as: (Choose all that apply) 1) Automatic in a member function coincides the lifetime of the function 2) Member data of an object coincide with the lifetime of the object 3) External coincide with the life time of the class 4) Static in a member function coincide with the lifetime of the function
1;4
1;2
2;3
3;4

18. 16. There is no problem with returning the value of a variable defined as automatic within a member function so long as it is returned by the value.
True
False

19. 17. A copy constructor is invoked when: 1) A function returns by reference 2) A function returns by value 3) An argument is passes reference 4) An argument is passed by value
2;4
1;4
2;3
1;3

20. 18. What does this pointer point to?
The object of the function whose using its member
The current occupying object
Both a and b
None of these

21. The flow of function through the function
19. A C++ stream is:
The flow of function through the function
The flow of data from one place to another
A file
None of these

22. 20. The base class for most stream classes is the ____class.
IOS IS OS
None of these

23. 21. Which stream class is to only write on files?
ofstream
ifstream
fstream
iostream

24. 22. Which stream class is to only read on files?
of stream
if stream
stream
upstream

25. 23. To perform File I/O operations, we must use _________ header file.
<ifstream>
<ofstream>
<fstream>
Any of these

26. 24. Which of the following is not a file opening mode ____ .
Ions::ate
Ions::concrete
Ions::no replace
Ions::truncate

27. 25. Streams that will be performing both input and output operations must be declared as class _______.
iostream
stream
stdstream
Stdiostream

28. 26. To create an output stream, we must declare the stream to be of class ___________.
ofstream
ifstream
iostream
None of these

29. 27. Which among following is used to open a file in binary mode ?
Ios::app
Ios::out
Ios::in
Ios::binary

30. 28. Which is correct syntax?
myfile:open ("example.bin", ios::out);
myfile.open ("example.bin", ios::out);
myfile::open ("example.bin", ios::out);
myfile.open ("example.bin", ios:out);

31. 29. Which among following is correct syntax of closing a file in C++ ?
myfile$close();
myfile:close();
myfile.close();

32. 30. __________ is return type of is_open() function.
into
bolo
float
char *

33. 31. It is not possible to combine two or more file opening mode in open () method.
True
False

34. 32. By default, all the files are opened in ___________mode
Binary
Text
Can’t say
No idea

35. 33. What is use of elf()?
Returns true if a file open for reading has reached the next character.
Returns true if a file open for reading has reached the next word.
Returns true if a file open for reading has reached the end
Returns true if a file open for reading has reached the middle

36. 34. Which functions allow changing the location of the get and putting positions?
sg() and sp()
sekg() and sekp()
gog() and gop()
seekg() and seekp()

37. 35. Offset counted from the current position using?
Ios::curr
Ios::cr
Ios::cur
Ios::current

38. 36. Which among is used for positioning relative to the beginning of a stream?
Ios::start
Ios::beg
Ios::begin
Ios::begining

39. 37. Which is among following is used to Open a file for output and move the read/write control to the end of the file?
Ios::ate
Ios::ann
Ios::at
Ios::end

40. 38. Which is correct syntax for, position n bytes back from end of fileObject ?
fileObject.seekg(ios::end, n);
fileObject.seekg(n, ios:end );
fileObject.seekg(n, ios::end );
fileObject.seekg(ios:end, n);

41. 39. Which stream class is used to both read and write on files
ifstream
fstream
ofstream
iostream

42. 40. How to get position to the nth byte of fileObject?
fileObject.seekg( 'filename',n );
fileObject.seekg( n, 'filename' );
fileObject.seekg( n );
fileObject.seekg( n, ios::app );

43. 41. eof() is used to get: Easy code review End of file Debug report
File close

44. 42. Name of the streams that are used for:
If stream
Of stream
F stream
All of them

45. 43. Some stream work with input and some with output?
True
False

46. 44. We can output a text on an object class of ofstream using the insertion operator because:
The ofstream class is the stream
The insertion operator is work with all classes
We are actually outputting to cout
The insertion operator is overloaded in ofstream

47. The insertion operator
45. To write data of the type float, to an object of type ofstream you should use:
The insertion operator
Seeking()
Write()
Put()

48. 46. Mode bit such as app and ate: (Choose all that apply) 1) Are defined as ios class 2) Can specify if the file is open for read or write 3) Work with the put() and get() function 4) Specify ways of opening a file
2;3;4
1;3;4
1;4
1;2;3

49. 47. A file pointer is always contains the address of the file.
False
True

50. 48. The statement f1.write((char*)^obj1, sizeof(obj1));
Writes the member function of obj1 to f1
Writes the date in obj1 to f1
Writes the member function and data of obj1 to f1
Writes the address if obj1 to f1

51. 49. Redirection redirects:
A stream from a file to screen
A file from a device to a stream
A device from a stream to screen
The screen from a device to stream

52. 50. The printer can access using the predefined filename____?
PRN
PLC
Can be both
None of these

53. The Results