Which of the following statements is NOT true about the file slack spaces in Windows operating system?

This is true - file slack includes RAM slack, which is data padded from memory to fill the sector boundary, potentially exposing residual in-memory data.

This statement is false because file slack is determined by the difference between the file's actual size and the total size of the cluster(s) allocated to it. When cluster size is larger, more unused space can exist at the end of the last allocated cluster, which increases - not decreases - the potential volume of file slack. For example, a 1 KB file stored in a 4 KB cluster produces 3 KB of slack.

This is true - file slack is correctly defined as the unused space between the logical end of a file's data and the physical end of its last allocated cluster.

This is true - forensic investigators frequently recover usernames, passwords, and other sensitive artifacts from file slack space during digital investigations.