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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 - C++ does not supports the following
Answer : D
Explaination
C++ supports all the forms of inheritance.
Q 2 - Choose the respective delete operator usage for the expression ptr=new int[100].
Answer : C
Explaination
Q 3 - What is the output of the following program?
#include<iostream>
using namespace std;
main() {
int i = 1, j = 2, k = 3, r;
r = (i, j, k);
cout<<r<<endl;
}
Answer : C
Explaination
Comma is called as the separator operator and the associativity is from left to right. Therefore k is the expressions resultant.
#include<iostream>
using namespace std;
main() {
int i = 1, j = 2, k = 3, r;
r = (i, j, k);
cout<<r<<endl;
}
Q 4 - How many number of arguments can a destructor of a class receives?
Answer : A
Explaination
The destructor receives no arguments and is only form to be provided. Hence destructor cannot be overloaded.
Q 5 - Objects created using new operator are stored in __ memory.
Answer : B
Explaination
new operator allocates memory dynamically know as Heap/free memory.
Q 6 - Choose the option not applicable for the constructor.
Answer : C
Explaination
A constructor cant be overridden.
Q 7 - What is the output of the following program?
#include<iostream>
using namespace std;
void f() {
static int i;
++i;
cout<<i<<" ";
}
main() {
f();
f();
f();
}
Answer : D
Explaination
1 2 3, A static local variables retains its value between the function calls and the default value is 0.
#include<iostream>
using namespace std;
void f() {
static int i;
++i;
cout<<i<<" ";
}
main() {
f();
f();
f();
}
Q 8 - What is the output of the following program?
#include<iostream>
using namespace std;
main() {
union abc {
int x;
char ch;
} var;
var.ch = 'A';
cout<<var.x;
}
Answer : B
Explaination
65, as the union variables share common memory for all its elements, x gets A whose ASCII value is 65 and is printed.
#include<iostream>
using namespace std;
main() {
union abc {
int x;
char ch;
} var;
var.ch = 'A';
cout<<var.x;
}
Q 9 - A single line comment in C++ language source code can begin with _____
Answer : D
Explaination
Two immediate forward slashes are used to comment a single line. A single can be commented by beginning with /* and should be terminated with */ , in general used for multi-line comments.
Q 10 - i) Exceptions can be traced and controlled using conditional statements.
ii) For critical exceptions compiler provides the handler
Answer : B
Explaination
Conditional statements are used to take alternate actions depending upon certain condition but not multi branching. C++ too provides some critical exception handlers.