What will be the output of the following C++ code?
#include <iostream>
#include <set>
using namespace std;
int main()
{
set<int> tst;
tst.insert(12);
tst.insert(21);
tst.insert(32);
tst.insert(31);
set<int> :: const_iterator pos;
for(pos = tst.begin(); pos != tst.end(); ++pos)
cout << *pos << ' ';
return 0;
}
#include <iostream>
#include <set>
using namespace std;
int main()
{
set<int> tst;
tst.insert(12);
tst.insert(21);
tst.insert(32);
tst.insert(31);
set<int> :: const_iterator pos;
for(pos = tst.begin(); pos != tst.end(); ++pos)
cout << *pos << ' ';
return 0;
}A. 12 21 32 31
B. 12 21 31 32
C. 12 21 32
D. 12 21 31
Answer: Option B
What does the 'sizeof' operator return in C++?
A. Size of a data type in bits
B. Size of a data type in bytes
C. Size of a variable in bytes
D. Size of a variable in bits
What is the purpose of the 'static' keyword in C++?
A. To declare a variable with dynamic storage duration
B. To declare a constant
C. To declare a variable with external linkage
D. To declare a variable with static storage duration
What is the difference between '++i' and 'i++' in C++?
A. None of the above
B. They both have the same effect
C. '++i' increments the value of 'i' before returning it, while 'i++' increments the value of 'i' after returning it
D. '++i' increments the value of 'i' after returning it, while 'i++' increments the value of 'i' before returning it

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