Graduate Engineer Trainee

Ans- b) A structure that maps keys to values

Ans- a) Candidate

Ans- 50 seconds.

Step-by-step Solution
main() declares a = 5.

update(a) is called.

x receives a copy of a (x=5).

x is updated: x = x*2 = 10.

Prints: Inside update: 10.

Control returns to main().

a in main is unchanged (a=5) because x was a copy.

Prints: Inside main: 5.

arr is {10, 20, 30, 40, 50}.

arr[0]=10

arr[1]=20

arr[2]=30

arr[3]=40

arr[4]=50

p = arr + 2;

Pointer p points to arr[2] (value 30).

cout << *p;

*p = 30.

Prints: 30.

cout << *(p + 2);

p+2 points to arr[4] (value 50).

Prints: 50.

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