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STL (138) - OOPS (873)
- C++ General (2378)
1. What does the following do:
void afunction(int *x)
{
x=new int;
*x=12;
}
int main()
{
int v=10;
afunction(&v);
cout<
Which uses less memory? a) struct astruct { int x; float y; int v; }; b) union aunion { int x; float v; }; c) char array[10];
4 7696Evaluate: int fn(int v) { if(v==1 || v==0) return 1; if(v%2==0) return fn(v/2)+2; else return fn(v-1)+3; } for fn(7); a) 10 b) 11 c) 1
4 10149Which of the Standard C++ casts can be used to perform a ?safe? downcast: a) reinterpret_cast b) dynamic_cast c) static_cast d) const_cast
2 6263class professor {}; class teacher : public virtual professor {}; class researcher : public virtual professor {}; class myprofessor : public teacher, public researcher {}; Referring to the sample code above, if an object of class "myprofessor" were created, how many instances of professor will it contain? a) 0 b) 1 c) 2 d) 3 e) 4
4 10058string somestring ; Which of the following choices will convert a standard C++ string object "somestring" to a C string? a) Copy.somestring () ; b) somestring.c_str () c) &somestring [1] d) std::cstring (somestring) e) (char *) somestring
1 6278class basex { int x; public: void setx(int y) {x=y;} }; class derived : basex {}; What is the access level for the member function "setx" in the class "derived" above? a) private b) local c) global d) public e) protected
3 7511class Alpha { public: char data[10000]; Alpha(); ~Alpha(); }; class Beta { public: Beta() { n = 0; } void FillData(Alpha a); private: int n; }; How do you make the above sample code more efficient? a) If possible, make the constructor for Beta private to reduce the overhead of public constructors. b) Change the return type in FillData to int to negate the implicit return conversion from "int" to "void". c) Make the destructor for Alpha virtual. d) Make the constructor for Alpha virtual. e) Pass a const reference to Alpha in FillData
2 8288class HasStatic { static int I; }; Referring to the sample code above, what is the appropriate method of defining the member variable "I", and assigning it the value 10, outside of the class declaration? a) HasStatic I = 10; b) int static I = 10; c) static I(10); d) static I = 10; e) int HasStatic::I = 10;
1 4635
What is an orthogonal base class in c++?
Is it possible to use a new for the reallocation of pointers ?
What are its advantages and disadvantages of multiple inheritances (virtual inheritance)?
the maximum length of a character constant can be a) 2 b) 1 c) 8
What is a Default constructor?
What you know about structures in C++?
Why are arrays usually processed with for loop?
What is an inclusion guard?
What is a container class?
What is the difference between inheritance and polymorphism?
What is the real time example of encapsulation?
Define friend function.
What is the best free c++ compiler for windows?
Where is pseudocode used?
How do you generate a random number in c++?
