Algorithms
October 12, 2023Algorithms
October 12, 2023GATE 1994
| Question 20 |
In which one of the following cases is it possible to obtain different results for call-by reference and call-by-name parameter passing methods?
| Passing a constant value as a parameter | |
| Passing the address of an array as a parameter | |
| Passing an array element as a parameter | |
| Passing an array following statements is true |
Question 20 Explanation:
Passing an array element as a parameter then it gives different output values for the call-by-reference and call-by-name parameters.
{ ……..
a[ ] = {1, 2, 3, 4}
i = 0
fun(a[i]);
print a[0];
}
fun(int x)
{
int i = 1;
x = 8;
}
{ ……..
a[ ] = {1, 2, 3, 4}
i = 0
fun(a[i]);
print a[0];
}
fun(int x)
{
int i = 1;
x = 8;
}
O/p:
Call-by-reference = 8
Call-by-value = 1
Correct Answer: B
Question 20 Explanation:
Passing an array element as a parameter then it gives different output values for the call-by-reference and call-by-name parameters.
{ ……..
a[ ] = {1, 2, 3, 4}
i = 0
fun(a[i]);
print a[0];
}
fun(int x)
{
int i = 1;
x = 8;
}
{ ……..
a[ ] = {1, 2, 3, 4}
i = 0
fun(a[i]);
print a[0];
}
fun(int x)
{
int i = 1;
x = 8;
}
O/p:
Call-by-reference = 8
Call-by-value = 1