4. Give two advantages of a fixed magnetic hard disk compared to an optical disc to store data. [2 marks]​

Hacking is when someone without the right to do so, goes into your accounts or stuff and takes over it and you can’t get back on it.

Cprogram to find //perimeter of rectangle printf(" \n perimeter of rectangle \n"); printf(""); printf("\n enter width and length of the rectangle : "); scanf("%f%f", & width,& length); perimeter = 2 * (width + length); printf("perimeter of rectangle is: %.3f", perimeter);