| 21. | Which of the following differentiates between overloaded functions and overridden functions? |
| a. | Overloading is a dynamic or runtime binding and overridden is a static or compile time binding. |
| b. | Overloading is a static or compile time binding and overriding is dynamic or runtime binding. |
| c. | Redefining a function in a friend class is called overloading, while redefining a function in a derived class is called as overridden function. |
| d. | Redefining a function in a derived class is called function overloading, while redefining a function in a friend class is called function overriding. |
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Answer: (b).Overloading is a static or compile time binding and overriding is dynamic or runtime binding.
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| 22. | Which of the following is not a member of class? |
| a. | Static function |
| b. | Friend function |
| c. | Const function |
| d. | Virtual function |
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Answer: (b).Friend function
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| 23. | Consider the following statements S1, S2 and S3 :
S1 : In call-by-value, anything that is passed into a function call is unchanged in the caller's scope when the function returns. S2: In call-by-reference, a function receives implicit reference to a variable used as argument. S3: In call-by-reference, caller is unable to see the modified variable used as argument. |
| a. | S3 and S2 are true |
| b. | S3 and S1 are true |
| c. | S2 and S1 are true |
| d. | S1, S2, S3 are true |
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Answer: (d).S1, S2, S3 are true
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| 24. | How many tokens will be generated by the scanner for the following statement?
x = x * (a+b) - 5; |
| a. | 12 |
| b. | 11 |
| c. | 10 |
| d. | 7 |
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Answer: (b).11
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| 25. | When the following code is executed , what will be the value of x and y ?
int x =1, y= 0; y=x++; |
| a. | 2,1 |
| b. | 2,2 |
| c. | 1,1 |
| d. | 1,2 |
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Answer: (a).2,1
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| 26. | What is the output of the following program ?
(Assume that the appropriate preprocessor directives are included and there is no syntax error) main ( ) { char S[ ] = "ABCDEFGH"; printf ("%C",* (& S[3])); printf ("%s", S + 4); printf ("%u", S); /* Base address of S is 1000 */ } |
| a. | ABCDEFGH1000 |
| b. | CDEFGH1000 |
| c. | DDEFGHH1000 |
| d. | DEFGH1000 |
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Answer: (d).DEFGH1000
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| 27. | Which of the following, in C++, is inherited in a derived class from base class ? |
| a. | constructor |
| b. | destructor |
| c. | data members |
| d. | virtual methods |
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Answer: (c).data members
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| 28. | Given that x = 7.5, j = -1.0, n = 1.0, m = 2.0
The value of - - x + j = = x > n >= m is : |
| a. | 0 |
| b. | 1 |
| c. | 2 |
| d. | 3 |
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Answer: (a).0
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| 29. | Which of the following is incorrect in C++ ? |
| a. | When we write overloaded function we must code the function for each usage |
| b. | When we write function template we code the function only once |
| c. | It is difficult to debug macros |
| d. | Templates are more efficient than macros |
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Answer: (d).Templates are more efficient than macros
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| 30. | When the inheritance is private, the private methods in base class are in the _______________ derived class (in C++). |
| a. | inaccessible |
| b. | accessible |
| c. | protected |
| d. | public |
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Answer: (a).inaccessible
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