File System Structure:
In a Unix-like file system, the index node (inode) is a data structure that stores metadata about a file. It contains information such as the file's size, ownership, permissions, timestamps, and pointers to the data blocks where the file contents are stored.

Pointers in the Inode:
The given file system has the following pointers in the inode:
- 12 direct pointers: These pointers directly point to the data blocks that store the file's data. Each direct pointer can address one data block.
- 1 single-indirect pointer: This pointer points to a data block that contains a list of direct pointers. Each direct pointer in this list can address one data block.
- 1 double-indirect pointer: This pointer points to a data block that contains a list of single-indirect pointers. Each single-indirect pointer in this list points to a data block that contains a list of direct pointers. Each direct pointer in this nested list can address one data block.

Disk Block Size and Address:
The disk block size is given as 4 kB, which means each block can store 4 kilobytes (or 4 * 1024 bytes) of data. The disk block address is 32 bits long, which means it can represent 2^32 unique addresses.

Calculating Maximum File Size:
To calculate the maximum possible file size, we need to consider the number of pointers and the size of each block.

Direct Pointers:
- The inode has 12 direct pointers.
- Each direct pointer can address one data block.
- Since the disk block size is 4 kB, each data block can store 4 * 1024 bytes.
- Therefore, the total data size addressable by the direct pointers is 12 * 4 * 1024 bytes.

Single-Indirect Pointer:
- The inode has 1 single-indirect pointer.
- The single-indirect pointer points to a data block that contains a list of direct pointers.
- Since the disk block size is 4 kB, the single-indirect pointer can address (4 * 1024) / 4 = 1024 direct pointers.
- Therefore, the total data size addressable by the single-indirect pointer is 1024 * (4 * 1024) bytes.

Double-Indirect Pointer:
- The inode has 1 double-indirect pointer.
- The double-indirect pointer points to a data block that contains a list of single-indirect pointers.
- Since the disk block size is 4 kB, the double-indirect pointer can address (4 * 1024) / 4 = 1024 single-indirect pointers.
- Each single-indirect pointer can address (4 * 1024) / 4 = 1024 direct pointers.
- Therefore, the total data size addressable by the double-indirect pointer is 1024 * 1024 * (4 * 1024) bytes.

Maximum File Size:
To find the maximum possible file size, we add up the data sizes addressable by the direct pointers, single-indirect pointer, and double-indirect pointer:
Maximum File Size = (12 * 4 * 1024) + (1024 * (4 * 1024)) + (1024 * 1024 *