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C++ Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to C++ Framework. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Q 1 - One of the following is true for an inline function.
A - It executes faster as it is treated as a macro internally
B - It executes faster because it priority is more than normal function
Answer : A
Explaination
As inline function gets expanded at the line of call like a macro it executes faster.
Q 2 - A user defined header file is included by following statement in general.
Answer : A
Explaination
With the syntax as in (a) the compiler first looks for the file in the present working directory and then in the default include path if not found.
Q 3 - Which is the storage specifier used to modify the member variable even though the class object is a constant object?
Answer : D
Explaination
mutable is storage specifier introduced in C++ which is not available in C. A class member declared with mutable is modifiable though the object is constant.
Q 4 - Class function which is called automatically as soon as the object is created is called as __
Answer : A
Explaination
If not provided the same, default constructor from the compiler is called automatically otherwise the programmers provided constructor gets called.
Q 5 - What is the output of the following program?
#include<iostream>
using namespace std;
main() {
int const a = 5;
a++;
cout<<a;
}
Answer : D
Explaination
Compile error - constant variable cannot be modified.
Q 6 - (i) ios is the base class of istream
(ii) All the files are classified into only 2 types. (1) Text Files (2) Binary Files.
Answer : C
Explaination
Q 7 - i) Exception handling technically provides multi branching.
ii) Exception handling can be mimicked using goto construct.
Answer : A
Explaination
goto just does the unconditional branching.
Q 8 - What is the output of the following program?
#include<iostream>
using namespace std;
main() {
float t = 2;
switch(t) {
case 2: cout<<Hi;
default: cout<<"Hello";
}
}
Answer : D
Explaination
Error, switch expression cant be float value
#include<iostream>
using namespace std;
main() {
float t = 2;
switch(t) {
case 2: cout<<Hi;
default: cout<<"Hello";
}
}
Q 9 - What is the output of the following program?
#include<iostream>
using namespace std;
void f() {
static int i = 3;
cout<<i;
if(--i) f();
}
main() {
f();
}
Answer : B
Explaination
As the static variable retains its value from the function calls, the recursion happens thrice.
#include<iostream>
using namespace std;
void f() {
static int i = 3;
cout<<i;
if(--i) f();
}
main() {
f();
}
Q 10 - What is the output of the following program?
#include<iostream>
using namespace std;
void main() {
char s[] = "C++";
cout<<s<<" ";
s++;
cout<<s<<" ";
}
Answer : D
Explaination
s refers to a constant address and cannot be incremented.
#include<iostream>
using namespace std;
void main() {
char s[] = "C++";
cout<<s<<" ";
s++;
cout<<s<<" ";
}