CUET PG 2021 — Computer PYQ

Solution aur Explanation

Jab hum test_fun(10, 10) ko call karte hain, toh function ke andar variables ki state is tarah badalti hai:

1. Initialization:

   Function call ke waqt $x=10$ aur $y=10$ assign hote hain.

2. Step 1 ($x=0$):

   Variable $x$ ki value update hokar $0$ ho jati hai.

   State: $x=0,y=10$.

3. Step 2 ($p=\&x$):

   Pointer $p$ ab variable $x$ ke memory address ko point kar raha hai.

4. Step 3 ($y=\ast p$):

   $\ast p$ ka matlab hai "value at address $p$". Kyunki $p$, $x$ ko point kar raha hai, isliye $\ast p$ ki value $0$ hai. Ab $y$ mein $0$ assign ho jayega.

   State: $x=0,y=0$.

5. Step 4 ($\ast p=1$):

   Yahan hum address $p$ par rakhi value ko $1$ kar rahe hain. Kyunki $p$, $x$ ka address hai, isliye $x$ ki value badal kar $1$ ho jayegi.

   State: $x=1,y=0$.

6. Final Step (printf):

   printf("%d, %d", x, y) command $x$ aur $y$ ki current values ko print karega.

Output: