C++ Programming MCQ – Exception Handling

This set of C++ Programming Multiple Choice Questions & Answers (MCQs) focuses on “Exception Handling”.

1. What is an exception in C++ program?
a) A problem that arises during the execution of a program
b) A problem that arises during compilation
c) Also known as the syntax error
d) Also known as semantic error
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2. By default, what a program does when it detects an exception?
a) Continue running
b) Results in the termination of the program
c) Calls other functions of the program
d) Removes the exception and tells the programmer about an exception
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3. Why do we need to handle exceptions?
a) To avoid unexpected behaviour of a program during run-time
b) To let compiler remove all exceptions by itself
c) To successfully compile the program
d) To get correct output
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4. How Exception handling is implemented in the C++ program?
a) Using Exception keyword
b) Using try-catch block
c) Using Exception block
d) Using Error handling schedules
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5. What is the correct syntax of the try-catch block?
a)

try
{
	// programable codes.....
}
catch(Exceptions)
{
	// Code for handling exceptions....
}

b)

try()
{
	// programable codes.....
}
catch(Exceptions)
{
	// Code for handling exceptions....
}

c)

try
{
	// programable codes.....
}
catch
{
	// Code for handling exceptions....
}

d)

try()
{
	// programable codes.....
}
catch
{
	// Code for handling exceptions....
}

try{
	// codes that needs to check for exceptions
}
catch(Exception E1){
      // codes for handling exception.... 
      // Exception E denotes the type of exception this block is handling.
}
catch(Exception E2){
	// other exception that needs to be handled...
}

6. Which part of the try-catch block is always fully executed?
a) try part
b) catch part
c) finally part
d) throw part
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7. Which of the following is an exception in C++?
a) Divide by zero
b) Semicolon not written
c) Variable not declared
d) An expression is wrongly written
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8. What is an error in C++?
a) Violation of syntactic and semantic rules of a languages
b) Missing of Semicolon
c) Missing of double quotes
d) Violation of program interface
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9. What is the difference between error and exception?
a) Both are the same
b) Errors can be handled at the run-time but the exceptions cannot
c) Exceptions can be handled at the run-time but the errors cannot
d) Both can be handled during run-time
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10. What are the different types of exceptions?
a) 1
b) 2
c) 3
d) 4
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11. Which keyword is used to throw an exception?
a) try
b) throw
c) throws
d) except
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12. What will be the output of the following C++ code?

#include <iostream>
#include <string>
#include <cstdlib>
using namespace std;
 
void func(int a, int b)
{
 
	if(b == 0){
		throw "This value of b will make the product zero. " 
                      "So please provide positive values.\n";
	}
	else{
		cout<<"Product of "<<a<<" and  "<<b<<" is: "<<a*b<<endl;
	}
}
 
int main()
{
	try{
		func(5,0);
	}
	catch(const char* e){
		cout<<e;
	}
}

a) 0
b) 5
c) This value of b will make the product zero. So please provide positive values.
d) Product of 5 and 0 is: 0
View Answer

$ ./a.out 
This value of b will make the product zero. So please provide positive values.

13. What will be the output of the following C++ code?

#include <iostream>
#include <string>
#include <cstdlib>
using namespace std;
void func(int a, int b)
{
	if(b == 0){
		throw "This value of b will make the product zero. " 
                       "So please provide positive values.\n";
	}
	else{
		cout<<"Product of "<<a<<" and  "<<b<<" is: "<<a*b<<endl;
	}
}
 
int main()
{
	try{
		func(5,0);
	}
	catch(char* e){
		cout<<e;
	}
}

a) 0
b) Aborted (core dumped)
c) This value of b will make the product zero. So please provide positive values.
d) Product of 5 and 0 is: 0
View Answer

$ ./a.out 
terminate called after throwing an instance of 'char const*'
Aborted (core dumped)

14. What is Re-throwing an exception means in C++?
a) An exception that is thrown again as it is not handled by that catching block
b) An exception that is caught twice
c) An exception that is not handled in one caught hence thrown again
d) All of the mentioned
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15. What will be the output of the following C++ code?

#include <iostream>
#include <string>
#include <cstdlib>
using namespace std;
void func(int a, int b)
{
	if(b < 1){
		throw b;
	}
	else{
		cout<<"Product of "<<a<<" and  "<<b<<" is: "<<a*b<<endl;
	}
}
 
int main()
{
	try
        {
		try
                {			
		    func(5,-1);
		}
		catch(int b)
                {
			if(b==0)
				throw "value of b is zero\n";
			else
				throw "value of b is less than zero\n";
		}
	}
	catch(const char* e)
        {
		cout<<e;
	}
 
}

a) value of b is zero
b) value of b is less than zero
c) Product of 5 and -1 is: -5
d) Aborted(core dumped)
View Answer

$ ./a.out 
value of b is less than zero

More Exception Handling MCQs in C++ Programming:

• Exception Handling MCQ (Set 2)
• Exception Handling MCQ (Set 3)

Sanfoundry Global Education & Learning Series – C++ Programming Language.

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