Online Access Free 1z1-100 Practice Test

A web server on HOST01 is listening on port 80.
Examine the IPTABLES rule shown:
[root@host01 ~] # iptables -L INPUT
Chain INPUT (policy ACCEPT)
targetportoptsourcedestination
ACCEPTtcp- - anywhereanywheretcp dpt:http
Another rule is then added:
[root@host01 ~] # iptables -A INPUT -P tcp - - dport 80 -j REJECT
What is the effect of this command on subsequent attempts to access the web server on HOST01 using port
80?

• A.New connection attempts are refused and the client informed of the refusal.
• B.New connection attempts timeout.
• C.New connection attempts always succeed.
• D.New connection attempts succeed until a reload of the firewall rules.

An Oracle Linux system has not been updated for a while and the currently running kernel is three releases behind the most recent kernel release.
Each released kernel fixed several problems, totaling 11 bug fixes.
You are about to update this kernel using this command:

How does Ksplice Uptrack apply these updates? (Choose the best answer.)

• A.It downloads three updates, clones the running kernel in memory, applies the updates in one single atomic update, and uses Kexec to activate the updated kernel
• B.It downloads three updates and applies them in a single transaction to the running kernel
• C.It downloads 11 updates and applies them in a single transaction to the running kernel
• D.It downloads 11 updates and applies them one by one to the running kernel

Which three statements are true about the shared directories defined in the /etc/exports file?

• A.By default, a directory is shared with no root squashed.
• B.By default, a directory is shared with root squashed.
• C.By default, a directory is shared sync.
• D.By default, a directory is shared read write.
• E.By default, a directory is shared read only.

Examine this extract from the /etc/ssh/sshd_config file:
passwordAuthentication no
What is the effect of this parameter settings on the use of openSSH commands on both the client and server?

• A.Passwords are not required and no ssh-keygen is required either. Only passphrase are required.
• B.Client users whose keys are not in the authorized_keys file on the server are unable to use passwords to authenticate themselves to the server.
• C.Client users whose keys are not in the authorized_keys file on the client are unable to use passwords to authenticate themselves to the server.
• D.The ssh daemon does not ask for a password before starting or stopping the sshd service.

Which three actions may be performed using the date command in Oracle Linux?

• A.Displaying the time and date in the future
• B.Setting the hardware clock from the current system time
• C.Setting the system time from the hardware clock
• D.Displaying the time and date in the past
• E.Displaying the current time in an administrator-specified format
• F.Synchronizing the system time from an ntp server