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Question 1: What is the output of the following snippet?
#include <iostream>
using namespace std;
int main()
{
float x = 0.9, y=-0.5;
int i,j = 1;
i = x + j + y;
cout << i;
return 0;
}
- 2.4
- Compilation error
- 1
- 2
Question 2: What is the output of the following snippet?
#include <iostream>
#include <string>
#include <exception>
using namespace std;
class a
{
public: virtual string whose()
{ return “mine”; }
};
class b
{
public: virtual string whose()
{ return “yours”; }
};
int main () {
a b;
try { throw b; }
catch (a& e) { cout << e.whose() << endl; }
return 0;
}
- yours
- mineyours
- mine
- yoursmine
Question 3: What is the output of this program if the string bar is supplied as input?
#include <iostream>
#include <string>
using namespace std;
int main()
{
string s1 = “foo”;
string s2;
getline(cin,s2);
cout << s2.append(s1);
return( 0 );
}
- barfoo
- bar
- foo
- foobar
Question 4: What is the output of the following snippet?
#include <iostream>
using namespace std;
int main()
{
int a = -1, *p = &a;
cout << ((p == NULL) ? 1.1 : 2.2);
return 0;
}
- None of these
- Compilation error
- 1.1
- 2.2
Question 5: What is the output of the following snippet?
#include <iostream>
using namespace std;
class foo {
int p;
protected:
int q;
public:
int r;
};
class bar : public foo {
public:
void assign() {
p = q = r = 2;
}
void out() { cout << q << r; }
};
int main () {
bar b;
b.assign();
b.out();
return 0;
}
- Compilation fails
- 20
- 22
- 02
Question 6: What is the output of the following snippet?
#include <iostream>
using namespace std;
#define A 0
#define B A+1
#define C 1-B
int main() {
cout << C;
return 0;
}
- 2
- 0
- 3
- 1
Question 7: Which of the following statements are correct about the following array?
char array[255];
- The expression tab[2] designates the second element in the array.
- The array can store 255 elements.
- The expression tab[255] designates the last element in the array.
- The array may be initialized at the time of declaration
Question 8: Which code, inserted into the main function, generates the output za
#include <iostream>
using namespace std;
namespace SpaceOne { char a = ‘a’; }
namespace SpaceTwo { char a = ‘z’; }
int main () {
// insert code here
return 0;
}
- None of these
- cout << SpaceTwo::a << SpaceOne::a;
- cout << SpaceOne::a << SpaceTwo::a;
- cout << a << a;
Question 9: What is the output of the following snippet?
#include <iostream>
using namespace std;
int main()
{
char str[] = “Hello\0World\0”;
cout << str;
return 0;
}
- HelloWorld
- Compilation fails
- Hello
- Hello\0World
Question 10: What is the output of the following snippet?
#include <iostream>
using namespace std;
int var = -1;
int static Static(int i)
{
static int y = 0;
y += ++i;
return y;
}
int main()
{
var++;
Static(var++);
cout << var << Static(var);
}
- 13
- 7
- 9
- 11
Question 11: What is the output of the following snippet?
#include <cstdlib>
#include <iostream>
using namespace std;
char c;
char* inc(char par1, int par2)
{
c = par1 + par2;
return &c;
}
int main()
{
int a = ‘a’, b = 3;
char *f;
f = inc(a,b);
cout << *f;
return 0;
}
- c
- d
- c
- a
Question 12: What is the output of the following snippet?
#include <cstdlib>
#include <iostream>
using namespace std;
char c;
char* inc(char par1, int par2)
{
c = par1 + par2;
return &c;
}
int main()
{
int a = ‘a’, b = 3;
char *f;
f = inc(a,b);
cout << *f;
return 0;
}
- c
- d
- c
- a
Question 13: What is the output of the following snippet?
#include <iostream>
using namespace std;
int main()
{
char i = ‘1’;
switch(i)
{
case ‘1’:
cout<<“Hello “;
case ‘2’:
cout<<“world “; break;
case ‘3’:
cout<<“!”;
} return 0;
}
- Hello
- Hello world!
- It prints nothing
- Hello world
Question 14: What is the output of the following snippet?
#include <iostream>
using namespace std;
int main()
{
int val = 0, *adr = &val;
cout << *val;
return 0;
}
- 0
- It prints address of val
- 1
- Compilation fails
Question 15: What is the output of the following snippet?
#include <iostream>
using namespace std;
int main (int argc, const char *argv[])
{
int a = 1, b = 1, c = 1, i = 1;
i = b < a < c;
cout << i;
return 0;
}
- 1
- Compilation fails
- 4
- 2
Question 16: What is the output of the following snippet?
#include <iostream>
void fun(int *i)
{
*i = *i >> *i – 1;
}
using namespace std;
int main()
{
int i = 2;
fun(&i);
cout << i;
return 0;
}
- 2
- 4
- 0
- 1
Question 17: How can we pass arguments to functions?
- By invocation
- By telepathy
- None of these
- By default
Question 18: What is the output of the following snippet?
#include <iostream>
#include <sstream>
#include <string>
using namespace std;
int main(void)
{
string s;
s = “abcd”;
s.append(s);
s.resize(s.size() / 2);
cout << s;
return 0;
}
- Compilation fails
- It prints an empty string
- abcdabcd
- abcd
Question 19: Which code, inserted into function main, generates the output abba? Choose all correct answers.
#include <iostream>
#include <string>
using namespace std;
string fun(string s)
{
return s.substr(0,1)+s.substr(1,1)+s.substr(1,1)+s.substr(0,1);
}
int main()
{
string *s = new string(“ab”);
//insert code here
return 0;
}
- cout << fun(*s);
- cout << fun(s);
- cout << fun(“abba”);
- cout << fun(“ab”);
Question 20: Which code, inserted into the One class, generates the output 123?
#include <iostream>
using namespace std;
class One {
public:
//insert code here
};
class Two : public One {
public:
void foo(){ cout << 2; }
};
class Three : public Two {
public:
void foo(){ cout << 3; }
};
int main()
{
One o1;
Two o2;
Three o3;
One *o = &o1;
o->foo();
o = &o2; o->foo();
o = &o3; o->foo();
}
- static void foo(){ cout << 1; }
- None of these
- virtual void foo(){ cout << 1; }
- void foo(){ cout << 1; }
Question 21: What is the output of the following snippet?
#include <iostream>
using namespace std;
int main (int argc, const char * argv[])
{
double dbl = -5.55;
cout << (int)dbl;
}
- 0
- -5.5
- -6
- –5
Question 22: What is the output of the following snippet?
#include <iostream>
using namespace std;
class one {
public :
void foo() { cout << 1; }
};
class two {
public :
void foo() { cout << 2; }
};
int main() {
two objects[2];
two *object = objects;
for(int i = 0; i < 2; i++)
(object++)->foo();
return 0;
}
- 22
- 11
- 21
- 12
Question 23: What is the output of the following snippet?
#include <iostream>
using namespace std;
int main ()
{
int i = 0;
cout << i;
{ int i = 1; cout << i; }
{ int i = 2; }
cout << i;
return 0;
}
- 012
- 120
- None of these
- 010
Question 24: What is the output of the following snippet?
#include <iostream>
using namespace std;
int sub(int x, int y)
{
x -= y;
return x;
}
int main()
{
int a = 0, b = 1, c, d;
c = sub(a,b);
d = sub(c,b);
cout << c << d;
return 0;
}
- 12
- -1-2
- 1-2
- -12
Question 25: What is the output of the following snippet?
#include <iostream>
using namespace std;
void foo(int ¶meter)
{
parameter *= 2;
}
int main()
{
int var = 2;
foo(var);
cout << var;
return 0;
}
- 8
- 4
- 2
- 1
Question 26: Which code, inserted into the main function, generate the output a 2?
#include <iostream>
using namespace std;
namespace Space
{ char a = ‘a’, b = ‘b’; }
int a = 1, b = 2;
int main () {
// insert code here
cout << a << ” ” << b;
return 0;
}
- using namespace Space::a;
- using Space::a;
- None of these
- using namespace Space;
Question 27: What is the output of the following snippet?
#include <iostream>
using namespace std;
class Zero
{ public: void out(){ cout << 0;} };
class One : public Zero
{ public: void out(){ cout << 1;} };
class Two : public Zero
{ public: void out(){ cout << 2;} };
int main()
{
Zero *obj;
One obj1;
obj = &obj1;
obj->out();
Two obj2;
obj = &obj2;
obj->out();
return 0;
}
- 00
- 01
- 12
- 02
Question 28: What is the output of the following snippet?
#include <iostream>
using namespace std;
class C1 {
friend class C2;
protected: int y;
public: int z;
private: int x;
public: C1() { x = y = z = 11; }
};
class C2 {
public: C1 a;
C2 () { a.x = 22; };
void foo() {
cout << a.x << a.y << a.z;
}
};
int main()
{
C2 c;
c.foo();
return 0;
}
- 221111
- 112211
- Compilation fails
- 111122
Question 29: Which code, inserted into the Class, generates the output abcd?
#include <iostream>
using namespace std;
class Class {
public:
static char value;
Class() { value++; };
~Class () { value++; };
//insert code here
void print() { cout << value;}
};
char Class::value = ‘a’;
int main () {
Class a,*b;
b = new Class();
b->set(‘a’);
b->print();
delete b;
a.print();
a.set(‘c’);
a.print();
a.set();
a.print();
return 0;
}
- void set(char c) { value = c; }
- void set(char c = ‘d’) { value = c; }
- void set(char c) { cout << c; }
- void set() { value = ‘d’; }
Question 30: Variable c in class B, will be:
class A {
int a;
protected:
int b;
public:
int c;
};
class B : public A {
float f;
public:
void foo() {
cout << f << c;
}
};
- protected
- public
- none of these
- private
Question 31: What is the output of the following snippet?
#include <iostream>
using namespace std;
class One
{
public:
void out(){ cout<<“One”;}
};
int main()
{
One arr[2];
for(int i = 0; i < 1; i++)
arr[i].out();
}
- Compilation error
- One
- Runtime error
- OneOn
