In reply to Er. Shipra:
You could create a parameter (or variable) representing the value you want and constraint your array to that parameter
class C;
rand int A[101];
parameter int P[101] = '{default:0, 4:6, 5:6, 100:89};
constraint c{foreach(A[i]) A[i]==P[i];}
endclass
Or you can simply make an assigment to A without randomizing it.