Exceptions That Are Not Errors(C++ Programming ) Questions and answers for exam Preparation

Question 1.

What kind of exceptions are available in c++?

handled
unhandled
static
dynamic

Explanation:-

Answer: Option B. -> unhandled

None

Question 2.

How to handle error in the destructor?

throwing
terminate
both a & b
none of the mentioned

Explanation:-

Answer: Option B. -> terminate

It will not throw an exception from the destructor but it will the process by using terminate() function.

Question 3.

What is the output of this program?

1.
#include
2.
#include
3.
using namespace std;
4.
void myunexpected ()
5.
{
6.
cout

caught other exception
caught int
unexpected called
both b & c

Explanation:-

Answer: Option D. -> both b & c

As we are calling set_unexpected (myunexpected) function, this is printing as unexpected

called and because of operator compliance it is arising an exception.
Output:
$ g++ etea.cpp
$ a.out
unexpected called
caught int

Question 4.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
int main()
4.
{
5.
int x = -1;
6.
char *ptr;
7.
ptr = new char[256];
8.
try
9.
{
10.
if (x < 0)
11.
{
12.
throw x;
13.
}
14.
if (ptr == NULL)
15.
{
16.
throw " ptr is NULL ";
17.
}
18.
}
19.
catch (...)
20.
{
21.
cout

-1
ptr is NULL
Exception occured: exiting
none of the mentioned

Explanation:-

Answer: Option C. -> Exception occured: exiting

catch(â€¦) is used to catch all types of exceptions arising in the program.
Output:
$ g++ etea.cpp
$ a.out
Exception occured: exiting

Question 5.

What is the output of this program?

1.
#include
2.
#include
3.
using namespace std;
4.
void myunexpected ()
5.
{
6.
cout

unexpected handler called
caught bad_exception
caught other exception
both a & b

Explanation:-

Answer: Option D. -> both a & b

In this program, We are calling set_unexpected and myfunction, So it is printing the output as the given.
Output:
$ g++ etae.cpp
$ a.out
unexpected handler called
caught bad_exception

Question 6.

What is the output of this program?

1.
#include
2.
#include
3.
using namespace std;
4.
void myunexpected ()
5.
{
6.
cout

unexpected handler called
caught bad_exception
caught other exception
both a & b

Explanation:-

Answer: Option D. -> both a & b

In this program, We are calling set_unexpected and myfunction, So it is printing the output as the given.
Output:
$ g++ etae.cpp
$ a.out
unexpected handler called
caught bad_exception

Question 7.

What is the output of this program?

1.
#include
2.
#include
3.
using namespace std;
4.
class Polymorphic {virtual void Member(){}};
5.
int main ()
6.
{
7.
try
8.
{
9.
Polymorphic * pb = 0;
10.
typeid(*pb);
11.
}
12.
catch (exception& e)
13.
{
14.
cerr

exception caught: std::bad_typeid
exception caught: std::bad_alloc
exception caught: std::bad_cast
none of the mentioned

Explanation:-

Answer: Option A. -> exception caught: std::bad_typeid

In this program, We used a bad type id for the polymorphic operator, So it is arising an

bad_typeid exception.
Output:
$ g++ etae.cpp
$ a.out
exception caught: std::bad_typeid

Question 8.

Which type of program is recommended to include in try block?

static memory allocation
dynamic memory allocation
const reference
pointer

Explanation:-

Answer: Option B. -> dynamic memory allocation

While during dynamic memory allocation, Your system may not have sufficient resources to

handle it, So it is better to use it inside the try block.

Question 9.

Which statement is used to catch all types of exceptions?

catch()
catch(Test t)
catch(----)
none of the mentioned

Explanation:-

Answer: Option C. -> catch(----)

This catch statement will catch all types of exceptions that arises in the program.

Question 10.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
int main()
4.
{
5.
int x = -1;
6.
try
7.
{
8.
if (x < 0)
9.
{
10.
throw x;
11.
}
12.
else
13.
{
14.
cout

-1
0
Exception occurred: Thrown value is -1
error

Explanation:-

Answer: Option C. -> Exception occurred: Thrown value is -1

As the given value is -1 and according to the condition, We are arising an exception.
Output:
$ g++ etae.cpp
$ a.out
Exception occurred: Thrown value is -1