$4\mathrm{.}1$ Compare the file systems used by windows $($NTFS$)$ and Linux $($EXT$4)$ Discuss their teatures, advantages, and potential limitations$.$

$(13$ Marks$)$

$4\mathrm{.}2$A user reports that a critical file on the Linux server has become corrupted. Explain the steps you would take to recover the file using the built$-$in tools of the tinux os$.$

$(6$ Marks$)$

$4\mathrm{.}3$ Llustrate a scenario where file permissions are incorrectly set on a Linux system, leading to a security vulnerability How would you identify and correct this issue?

$(6$ Marks$)$