Number of Substrings

Question

Total number of sub strings present in  "GATE" is

A)7       B) 10          C) 11         D)  8

Answer 1

0 length = 1 ( null)

1 length = 4 (G,A,T,E)

2 length=3 ( GA, AT , TE)

3 length= 2 ( GAT, ATE)

4 length = 1( GATE)

total= 1+2+3+4+1= 11