Which part of the cpu stores instructions for high speed access or processing

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Windows defender is an antispyware software.it does not work effectively if any other antispyware is added.

Wifi router/

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);