Ilp C++ Quiz Prelims 2
ILP C++ Quiz Prelims 2
- 1.A class which can have only one instance at any time is called as ------------
- A.
Abstract
- B.
Singleton
- C.
Void class
- D.
None of the above
- 2.int main() { char s[]="welcome", *p=s; cout<<p+p[1]-p[3]; return 0; }
- A.
Welcome
- B.
Come
- C.
Error
- D.
Lcome
- 3.The base class of runtime_error is __________
- A.
Runtime class
- B.
Exception_handler class
- C.
Exception class
- D.
Virtual base class
- 4.Consider the below statement char *word=”tcs”; How do you get the address that is stored in the char* variable?
- A.
&word
- B.
Static_cast(word)
- C.
*(&word)
- D.
Static_cast(word)
- 5.Int main() { int n1=10,n2=2,k,*p1,*p2; p1=&n1,p2=&n2; k=*p1/*p2; cout<<k; return 0; }
- A.
5
- B.
Error
- C.
Division cannot be done over pointers
- D.
10
- 6.int main() { int a[20]={1,2,3}; cout<<a++; return 0; }
- A.
2
- B.
Address of a
- C.
Compilation error
- D.
Address of a+1
- 7.Which function helps to extract the string "is left" from the string "23.5 is left"
- A.
Atof()
- B.
Strtod()
- C.
Atod()
- D.
None
- 8.Which of the header file must be included to use stringstream?
- A.
- B.
- C.
- D.
- 9.If you use same variable for two getline statements
- A.
Both the inputs are stored in that variable
- B.
The second input overwrites the first one
- C.
The second input attempt fails since the variable already got its value
- D.
You can not use same variable for two getline statements
- 10.The size of following variable is not 4 bytes in 32 bit systems
- A.
Int
- B.
Long int
- C.
Short int
- D.
Float
- 11.What is the output of the follwing code int a=5,*p=&a; *p++; cout<<a<<"\t"<<*p<<endl; *++p; cout<<a<<"\t"<<*p<<endl;
- A.
5, 5, 6, 6
- B.
5, Garbage Value, 5, Garbage Value
- C.
5, 5, 5, Garbage value
- D.
Garbage Value, 5, 6, Garbage Value
- 12.class mybase{ }; class myclass : public mybase{ }; myclass m1; int main() { mybase *b1 = new myclass(); cout << "object m1 is of type " << typeid(b1).name(); }
- A.
Object m1 is of type myclass
- B.
Object m1 is of type mybase
- C.
Object m1 is of type P6mybase
- D.
Object m1 is of type P6myclass
- 13.What is the output of the following code snippet ? class VirtualClass { int x,y; public: VirtualClass() { x=1,y=2; } virtual void operator<<(ostream&); }; //end of class void VirtualClass::operator<<(ostream &os) { os<<this->x<<"\t"<<this->y; } int main() { VirtualClass vcObj; vcObj<<cout; return 0; }
- A.
2 1
- B.
Error
- C.
1 2
- D.
No output
- 14.Class ConstructTest { public: ConstructTest() { cout<<"Constructor"; } ~ConstructTest() { cout<<"Destructor"; } }; int main() { ConstructTest c[2]; return 0; }
- A.
ConstructorDestructorDestructor
- B.
ConstructorConstructorDestructor
- C.
ConstructorConstructorDestructorDestructor
- D.
ConstructorDestructorConstructorDestructor
- 15.What is the output of the following code snippet ? class Test { public: Test(int x) { cout<<”Param Construcor”; } }; //end of class int main() { Test t1=100; return 0; }
- A.
Compilation Error
- B.
No Ouput
- C.
Param Constructor
- D.
None of the above
- 16.What is the output of the below code ? class Alpha { public: Alpha(int a=10,int b) {cout<<a<<”\t”<<b;} }; int main() { Alpha x(10,20);}
- A.
Error
- B.
10 20
- C.
No output
- D.
None of the above
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