RHCSA RHCSA Linux Essentials 4

Question 1

Which NFS mount option ensures the client retries indefinitely if the server is unavailable at boot?

Accepted Answer

hard

Answer

The `hard` option causes the NFS client to keep retrying indefinitely until the server responds, preventing data corruption.

Question 2

You want to extend a logical volume `/dev/vg0/lv0` by 5 GiB while also resizing the XFS filesystem. Which command does both?

Accepted Answer

Both B and C are correct

Answer

Both `lvresize -r` and `lvextend -r` use the `-r` flag to resize the underlying filesystem automatically after extending the LV.

Question 3

Which file must be edited to persist an NFS mount across reboots?

Accepted Answer

/etc/fstab

Answer

/etc/fstab is read at boot to mount filesystems, including NFS shares, automatically.

Question 4

What is the purpose of the `--system` flag in `useradd --system myservice`?

Accepted Answer

Creates a user with UID below 1000 and no login shell or home directory by default

Answer

System accounts get a UID below 1000, no aging, no home directory, and no login shell — suitable for service accounts.

Question 5

Which command verifies that an RPM package's files have not been modified since installation?

Accepted Answer

rpm -V package

Answer

`rpm -V` (verify) checks file attributes like size, checksum, permissions, and timestamps against the RPM database.

RHCSA Exam Practice Test