Exceptions CPPE2 M3 Test

Exceptions CPPE2 M3 Test

  1. What is the output of the following snippet?

    #include <iostream>
#include <exception>
#include <stdexcept>
using namespace std;

class X : public domain_error  {
public:
    X() : domain_error("0") {};
};

void z() throw(X) {
    X x;
    throw x;
    cout << 1;
}

int main()
{
    X x;
    try {
       z();
    } catch(X &i) {
      cout << 1;
    }
    catch(domain_error &i) {
       cout << 0;
    }
    return 0;
}
    • Execution fails
    • 1
    • 0
    • Compilation fails

  2. What is the output of the following snippet?

    #include <iostream>
#include <exception>
#include <stdexcept>
using namespace std;

class Int {
public:
    int v;
    Int(int a) : v(a) {}
};

void a() {
    throw Int(1);
}

void b() {
    try {
       a();
    }catch(Int &i) {
         throw Int(i.v + 1);
    }
}

void c() {
    try {
         b();
     } catch(...) {
         throw;
     }
}

int main()
{
   try {
        c();
    } catch(Int &i) {
        cout<<i.v;
    }
    return 0;
}
    • 0
    • 1
    • 2
    • Compilation fails

  3. What is the output of the following snippet?

    #include <iostream>
#include <exception>
#include <stdexcept>
using namespace std;

class X : public logic_error {
public:
    X() : logic_error("0") {};
};

void z() throw(logic_error) {
    X x;
    throw x;
    cout << 1;
}

int main()
{
    X x;
    try {
         z();
     } catch(logic_error &i) {
         cout << i.what();
     }
     return 0;
}
    • Compilation fails
    • Execution fails
    • 0
    • 1

  4. What is the output of the following snippet?

    #include <iostream>
#include <exception>
using namespace std;

int main()
{
    throw 2/4;
    catch(int i) {
       cout << i;
    }
    return 0;
}
    • 0.5
    • Execution fails
    • 0
    • Compilation fails

  5. What is the output of the following snippet?

    #include <iostream>
#include <exception>
using namespace std;

int main()
{
    try {
       throw 2./4;
    }
    catch(int i) {
       cout << i;
    }
    return 0;
}
    • 0
    • Compilation fails
    • Execution fails
    • 0.5

  6. What is the output of the following snippet?

    #include <iostream>
#include <exception>
#include <stdexcept>
using namespace std;

class E {};

class X {
    static int c;
public:
    X() { if(c++ > 2) throw new E;}
    ~X() { if(c++ > 2) throw new E;}
};

int X::c = 0;

void f(int i) {
    X a,b;
    cout << i;
}

int main()
{
   try {
      f(0);
      f(1);
    } catch(...) {
       cout << 1;
    }
    return 0;
}
    • 0
    • Execution fails
    • Compilation fails
    • 01

  7. What is the output of the following snippet?

    #include <iostream>
#include <exception>
#include <stdexcept>
using namespace std;

class E {};

class X {
public:
    static int c;
    X(int a) { c = a; }
    ~X() { if(c++ > 2) throw new E; }
};

int X::c = 0;

void f(int i) {
     X* t[2];
     for(int j = 0; j < i; j++)
        t[j] = new X(i+1);
     for(int j = 0; j < i; j++)
        delete t[j];
}

int main(void)
{
    try {
        f(2);
    } catch(...) {
         cout << X::c;
    }
    return 0;
}
    • 2
    • 3
    • 2
    • Compilation fails

  8. What is the output of the following snippet?

    #include <iostream>
using namespace std;
class X {
public:
    X(void) throw(int) { cout << 1; }
    ~X(void) throw(int) { cout << 2; }
    void exec() { throw string("0"); }
};

void exec( X x) {
    x.exec() ;
}

int main(void) 
{
   X x;
   try {
       exec(x);
   } catch(int &i) {
       cout << i;
   }
   return 0;
}
    • Compilation fails
    • 102
    • 120
    • Execution fails

  9. What is the output of the following snippet?

    #include <iostream>
#include <exception>
#include <stdexcept>
using namespace std;

class X : public logic_error {
public:
    X() : logic_error("0") {};
};

void z() throw(X) {
    throw new logic_error("0");
}

int main(void)
{
    X x;
    try {
       z();
    } catch(X &i) {
       cout << i.what();
   }
    return 0;
}
    • 120
    • 102
    • Compilation fails
    • Execution fails

  10. What is the output of the following snippet?

    #include <iostream>
#include <exception>
using namespace std;

int main()
{
    try {
       throw exception();
    }
    catch(exception &x) {
       cout << x.what();
    }
    return 0;
}
    • It prints a non-empty string 
    • Compilation fails
    • It prints an empty string
    • Execution fails

  11. What is the output of the following snippet?

    #include <iostream>
using namespace std;
class X {
public:
    X(void) throw(int) { cout << 1; }
    ~X(void) throw(int) { cout << 2; }
    void exec() { throw 0; }
};

void exec( X &x) {
    x.exec() ;
}

int main(void) 
{
   X x;
   try {
       exec(x);
   } catch(int &i) {
       cout << i;
   }
   return 0;
}
    • Compilation fails
    • 120
    • 102
    • Execution fails

  12. What is the output of the following snippet?

    #include <iostream>
using namespace std;
class X {
public:
    X(void) { cout << 1; }
    ~X(void) { cout << 2; }
};

X *exec() {
    X *x = new X();
    throw string("0");
    return x;
}

int main(void) 
{
   X *x;
   try {
       delete exec();
   } catch(string &s) {
       cout << s;
   }
   return 0;
}
    • 12
    • Compilation fails
    • 10
    • Execution fails

  13. What is the output of the following snippet?

    #include <iostream>
#include <exception>
#include <stdexcept>
using namespace std;
class X : public runtime_error {
public:
    X() : domain_error("0") {};
};

void z() throw(X) {
    X x;
    throw x;
    cout << 1;
}

int main(void) {
    X x;
    try {
        z();
    } catch(X &i) {
        cout << 1;
    }
    catch(domain_error &i) {
        cout << 0;
    }
    return 0;
}
    • 0
    • Compilation fails
    • Execution fails
    • 1

  14. What is the output of the following snippet?

    #include <iostream>
#include <exception>
#include <stdexcept>
using namespace std;
class Int {
public:
    int v;
    Int(int a) : v(a) {}
};

void a() {
    throw 0;
}

void b() {
    try {
        a();
    }catch(int i) {
        throw Int(i + 1);
    }
}

void c() {
    try {
        b();
     }catch(...) {
        throw;
     }
}

int main(void) 
{
   try {
       c();
   } catch(int &i) {
       cout << i.v;
   }
   return 0;
}
    • 2
    • 1
    • 0
    • Compilation fails

  15. What is the output of the following snippet?

    #include <iostream>
#include <string>
using namespace std;
class X {
public:
    X(void) { cout << 1; }
    ~X(void) { cout << 2; }
};

void exec() {
    X x; 
    throw string("0");
}

int main(void) 
{
   try {
       exec();
   } catch(string &s) {
       cout << s;
   }
   return 0;
}
    • 102
    • Execution fails
    • 120
    • Compilation fails

  16. What is the output of the following snippet?

    #include <iostream>
#include <exception>
using namespace std;

int main() 
{
   try {
       throw 2./4;
   } 
   catch(int i) {
       cout << i;
   }
   return 0;
}
    • 0
    • Compilation fails
    • Execution fails
    • 0.5

  17. What is the output of the following snippet?

    #include <iostream>
#include <exception>
#include <stdexcept>
using namespace std;
class E {};

void f(int i) {
    E e;
    switch(i) {
    case 0: throw e;
    case 1: throw &e;
    }
    cout << 0;
}

int main(void) 
{
   try {
       f(2);
   } catch(E*) {
       cout << 1;
   }catch(E) {
       cout << 2;
   }
   return 0;
}
    • Compilation fails
    • 1
    • 2
    • 0

  18. What is the output of the following snippet?

    #include <iostream>
using namespace std;
class X {
public:
    X(void) { cout << 0; }
    ~X(void) { cout << 2; }
};

int main(void) 
{
   try {
       X *x = new X();
   throw true; 
       delete x;
   } catch(bool s) {
       cout << s;
   }
   return 0;
}
    • 01
    • Execution fails
    • 021
    • Compilation fails

  19. What is the output of the following snippet?

    #include <iostream>
#include <exception>
#include <stdexcept>
using namespace std;
class E {};

void f(int i) {
    E e;
    switch(i) {
    case 0: throw e;
    case 1: throw &e;
    }
    cout << 0;
}

int main(void) 
{
   try {
       f(1);
   } catch(void *) {
       cout << 2;
   } catch(E*) {
       cout << 1;
   }
   return 0;
}
    • 0
    • 1
    • 2
    • Compilation fails

  20. What is the output of the following snippet?

    #include <iostream>
#include <exception>
using namespace std;

int main(void) 
{
   try {
       throw 3.14;
   } catch(double x) {
       x *= 2;
   }
   cout << x;
   return 0;
}
    • Execution fails
    • It prints an empty string 
    • It prints an non-empty string
    • Compilation fails
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