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102-500 PDF DEMO:
QUESTION NO: 1
When the command echo $$ outputs 12942, what is the meaning of 12942?
A. It is the process ID of the echo command.
B. It is the process ID of the current shell.
C. It is the process ID of the last command which has been placed in the background.
D. It is the process ID of the last command executed.
Answer: B
QUESTION NO: 2
What command will display the group names and GIDs to which a user belongs? (Provide only the command name with or without path information)
Answer:
id, /usr/bin/id
QUESTION NO: 3
With X11 forwarding in ssh, what environment variable is automatically set in the remote host shell that is not set when X11 forwarding is not enabled? (Specify only the environment variable without any additional commands or values.)
Answer:
DISPLAY, $DISPLAY
QUESTION NO: 4
Which file contains a set of services and hosts that will be allowed to connect to the server by going through a TCP Wrapper program such as tcpd? (Specify the full name of the file, including path.)
Answer:
https://lh3.googleusercontent.com/-5cd-clmKnbk/AAAAAAAAAAI/AAAAAAAAADM/-
SXesH19Ido/s4/etc/hosts.allow
QUESTION NO: 5
What is true regarding TCP port 23?
A. Port 23 is the well known port for the SSH service which provides secure logins.
B. Port 23 is the well known port for the telnet service which is a plain text protocol that should no longer be used.
C. Port 23 is the well known port for the system login services which are encrypted when the user runs the starttls command in his login shell.
D. Port 23 is the well known port for the rlogin service which is SSL secured by default.
Answer: B
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Updated: May 28, 2022