n the following code,int f(int *a) { *a = 20;}int main() { int m = 30; f(&m);}a.The parameter passing is "pass by address", and the "address of m" is passedb.Parameter passing is by value, the value passed is "address of m", and copied into the argument *a c.Parameter passing is by value, the value passed is "m", and copied into the argument a d.Parameter passing is by value, the value passed is "address of m", and copied into the argument ae.The parameter passing is "pass by reference" and variable a is a reference to variable m.
Question
n the following code,int f(int *a) { *a = 20;}int main() { int m = 30; f(&m);}a.The parameter passing is "pass by address", and the "address of m" is passedb.Parameter passing is by value, the value passed is "address of m", and copied into the argument *a c.Parameter passing is by value, the value passed is "m", and copied into the argument a d.Parameter passing is by value, the value passed is "address of m", and copied into the argument ae.The parameter passing is "pass by reference" and variable a is a reference to variable m.
Solution
The correct answer is b. Parameter passing is by value, the value passed is "address of m", and copied into the argument *a. This is because in C, all function arguments are passed by value. The value here is the address of m, which is why we use the & operator. This address is then copied into the pointer a in the function f. The function then modifies the value at that address to be 20, which is why the value of m in the main function is changed after the function call.
Similar Questions
n the following code,int f(int *a) { *a = 20;}int main() { int m = 30; f(&m);}a.The parameter passing is "pass by address", and the "address of m" is passedb.Parameter passing is by value, the value passed is "address of m", and copied into the argument *a c.Parameter passing is by value, the value passed is "m", and copied into the argument a d.Parameter passing is by value, the value passed is "address of m", and copied into the argument ae.The parameter passing is "pass by reference" and variable a is a reference to variable m.
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