Questions and answers for exam Preparation

MCQs

Total Questions : 10

Question 1.

When exceptions are used?

To preserve the program
Exceptions are used when postconditions of a function cannot be satisfied.
Exceptions are used when postconditions of a function can be satisfied.
none of the mentioned

Discuss Question

Answer: Option C. -> Exceptions are used when postconditions of a function can be satisfied.

None.

Question 2.

Pick out the correct Answer.

Exceptions are not suitable for critical points in code.
Exception are suitable for critical points in code.
Both a & b
none of the mentioned

Discuss Question

Answer: Option A. -> Exceptions are not suitable for critical points in code.

If there is many number of exceptions in the program means, We have to use multiple catch

statement and it is hard to keep track of the program.

Question 3.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
void PrintSequence(int StopNum)
4.
{
5.
int Num;
6.
Num = 1;
7.
while (true)
8.
{
9.
if (Num >= StopNum)
10.
throw Num;
11.
cout

Exceptions are not suitable for critical points in code.
Exception are suitable for critical points in code.
Both a & b
none of the mentioned

Discuss Question

Answer: Option A. -> Exceptions are not suitable for critical points in code.

Answer:c
Explanation:In this program, We are printing one and raising a exception at 2.
Output:
$ g++ gex4.cpp
$ a.out
1
exception: 2

Question 4.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
void test(int x)
4.
{
5.
try
6.
{
7.
if (x > 0)
8.
throw x;
9.
else
10.
throw 'x';
11.
}
12.
catch(int x)
13.
{
14.
cout

integer:10character:x
integer:10
character:x
none of the mentioned

Discuss Question

Answer: Option A. -> integer:10character:x

We are passing the integer and character and catching it by using multiple catch statement.
Output:
$ g++ gex3.cpp
$ a.out
integer:10character:x

Question 5.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
int main()
4.
{
5.
int a = 10, b = 20, c = 30;
6.
float d;
7.
try
8.
{
9.
if ((a - b) != 0)
10.
{
11.
d = c / (a - b);
12.
cout

10
-3
15
none of the mentioned

Discuss Question

Answer: Option B. -> -3

We are manipulating the values, if there is any infinite value means, it will raise an exception.
Output:
$ g++ gex2.cpp
$ a.out
-3

Question 6.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
int main()
4.
{
5.
try
6.
{
7.
throw 1;
8.
}
9.
catch (int a)
10.
{
11.
cout

No exception
exception number
exception number: 1
none of the mentioned

Discuss Question

Answer: Option C. -> exception number: 1

If we caught a integer value means, there will be an exception, if it is not a integer, there will

not be a exception.
Output:
$ g++ gex1.cpp
$ a.out
exception number: 1

Question 7.

How many runtime error messages associated with exception?

2
4
5
infinite

Discuss Question

Answer: Option B. -> 4

There are four runtime error messages associated with exceptions.They are overflow_error,

range_error, system_error and underflow_error.

Question 8.

How many types of exception handling are there in c++?

Discuss Question

Answer: Option B. -> 2

There are two types of exception handling in c++. They are synchronous exception handling and

asynchronous exception handling.

Question 9.

What is the output of this program?

1.
#include
2.
using namespace std;
3.
int main()
4.
{
5.
double a = 10, b = 5, res;
6.
char Operator = '/';
7.
try
8.
{
9.
if (b == 0)
10.
throw "Division by zero not allowed";
11.
res = a / b;
12.
cout