Calculate the maximal size of a file if we have: 100 direct block address
one single indirect block address
one double indirect block address
one triple indirect block address
one quadrupple indirect block addresses
The size of a block is 1024 bytes. The size of an address is 8 bytes.

4 GB

Explanation:

Determine the maximal size of a file

100 direct block address

= 100 * 1024 = 102400

One single indirect block address

= 128 * 1024 = 131072

One double indirect block address

= 128 * 128 * 1024 = 16777216

one triple indirect block address

=  128 * 128 * 128 * 1024 = 2147483648

one quadruple indirect block addresses

=  128 * 128 * 128 * 128 * 1024 = 274877906944

maximal size of the file

= ∑ 102400 +  131072 + 16777216 + 2147483648 + 274877906944

= 4GB