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MCQs

Total Questions : 10
Question 1.

What should present when throwing a object?


  1.    constructor
  2.    copy-constructor
  3.    destructor
  4.    none of the mentioned
 Discuss Question
Answer: Option B. -> copy-constructor

None.


Question 2.

How to handle the exception in constructor?


  1.    We have to throw an exception
  2.    We have to return the exception
  3.    both a & b
  4.    none of the mentioned
 Discuss Question
Answer: Option A. -> We have to throw an exception

As a constructor don't have a return type, We have to throw the exception.



Question 3.


What is the output of this program?


1.
#include
2.
#include "math.h"
3.
using namespace std;
4.
double MySqrt(double d)
5.
{
6.
if (d < 0.0)
7.
throw "Cannot take sqrt of negative number";
8.
return sqrt(d);
9.
}
10.
int main()
11.
{
12.
double d = 5;
13.
cout
  1.    5
  2.    2.236
  3.    error
  4.    Cannot take sqrt of negative number
 Discuss Question
Answer: Option B. -> 2.236

We are finding the square root of the number, if it is a positive number, it can manipulate, Otherwise 

it will arise a exception.
Output:
$ g++ goe4.cpp
$ a.out
2.236


Question 4.


What is the output of this program?


1.
#include
2.
#include
3.
using namespace std;
4.
int main()
5.
{
6.
double Op1 = 10, Op2 = 5, Res;
7.
char Op;
8.
try
9.
{
10.
if (Op != '+' && Op != '-' && Op != '*' && Op != '/')
11.
throw Op;
12.
switch(Op)
13.
{
14.
case '+':
15.
Res = Op1 + Op2;
16.
break;
17.
case '-':
18.
Res = Op1 - Op2;
19.
break;
20.
case '*':
21.
Res = Op1 * Op2;
22.
break;
23.
case '/':
24.
Res = Op1 / Op2;
25.
break;
26.
}
27.
cout
  1.    15
  2.    5
  3.    2
  4.    is not a valid operator
 Discuss Question
Answer: Option D. -> is not a valid operator

It will arise a exception because we missed a operator.
Output:
$ g++ goe3.cpp
$ a.out
is not a valid operator


Question 5.


What is the output of this program?


1.
#include
2.
using namespace std;
3.
double division(int a, int b)
4.
{
5.
if ( b == 0 )
6.
{
7.
throw "Division by zero condition!";
8.
}
9.
return (a / b);
10.
}
11.
int main ()
12.
{
13.
int x = 50;
14.
int y = 0;
15.
double z = 0;
16.
try
17.
{
18.
z = division(x, y);
19.
cout
  1.    50
  2.    0
  3.    Division by zero condition!
  4.    none of the mentioned
 Discuss Question
Answer: Option C. -> Division by zero condition!

We are dividing the values and if one of the values is zero means, We are arising an exception.
Output:
$ g++ goe2.cpp
$ a.out
Division by zero condition!



Question 6.


What is the output of this program?


1.
#include
2.
using namespace std;
3.
int main()
4.
{
5.
int age=5;
6.
try
7.
{
8.
if (age < 0)
9.
throw "Positive Number Required";
10.
cout
  1.    5
  2.    10
  3.    15
  4.    Positive Number Required
 Discuss Question
Answer: Option A. -> 5

In this program, We are checking the age of a person, If it is zero means, We will arise a exception.
Output:
$ g++ goe1.cpp
$ a.out
5


Question 7.


What is the output of this program?


1.
#include
2.
#include
3.
using namespace std;
4.
class myexception: public exception
5.
{
6.
virtual const char* what() const throw()
7.
{
8.
return "exception arised";
9.
}
10.
} myex;
11.
int main ()
12.
{
13.
try
14.
{
15.
throw myex;
16.
}
17.
catch (exception& e)
18.
{
19.
cout
  1.    exception arised
  2.    error
  3.    exception
  4.    runtime error
 Discuss Question
Answer: Option A. -> exception arised

In this program, We are arising a standard exception and catching that and returning a statement.
Output:
$ g++ goe.cpp
$ a.out
exception arised


Question 8.

How many parameters does the throw expression can have?


  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option A. -> 1

In c++ program, We can be able to throw only one error at a time.


Question 9.

Where exception are handled?


  1.    inside the program
  2.    outside the regular code
  3.    both inside or outside
  4.    none of the mentioned
 Discuss Question
Answer: Option B. -> outside the regular code

none


Question 10.

Which is used to check the error in the block?


  1.    try
  2.    throw
  3.    catch
  4.    none of the mentioned
 Discuss Question
Answer: Option A. -> try

The try block is used to check for errors, if there is any error means, it can throw it to catch block.


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