DN-01

A system administrator issues the apt-get upgrade command on a Linux operating system. What is the purpose of this command?

• • Every application installed will update itself to the latest version.

• • Operating system updates are downloaded and will be installed.

• • The remote repository of applications and dependencies will be updated to the latest version.

• • A specific application named upgrade will be installed.

A Linux system administrator is searching the passwd file for any username that starts with a digit. Which grep command should the administrator use?

• • grep ‘(0-9}’ /etc/passwd

• • grep ‘[0-9]’ /etc/passwd

• • grep ‘_[0-9]’ /etc/passwd

• • grep ‘^[0-9]’ /etc/passwd

What is the output when the following code is entered into a Python program interpreter?

[1,2,4,5] + [3,6]

• • [1,2,3,4,5,6]

• • [12]+[9]

• • [21]

• • [1,2,4,5,3,6]

What is displayed after the following code is entered into a Python interpreter?

addition = 22 +10

print(addition)

• • nothing ( because the print command is wrong)

• • [22]+[10]

• • (syntaxerror)-…as there should not be a space between the numerical values

• • 32

A Linux administrator is attempting to use a terminal to configure the network interface card on a computer. The administrator receives a message that the administrator does not have necessary permissions to perform the configuration. What should be done prior to the configuration command?

• • identify a different network interface

• • use a different user account

• • use the sudo command

• • change the chmod permissions on the network configuration file

A network engineer needs to review the status of all network interfaces of a server running a Linux operating system. The engineer enters the command ifconfig -a. What is the resuit of this command?

• • All active interfaces will display information.

• • The ARP table of the computer will be displayed.

• • Both active and inactive interfaces will display information.

• • The host routing table will be displayed.

A system administrator attempts to determine what is causing a computer to perform slower than normal. The administrator issues the ps command. What is displayed by this command?

• • current RAM usage

• • current NIC status

• • active processes using CPU time

• • current HDD usage

A user issues the Linux command ls -l myfile.sh to check the permission of the file myfile.sh.

devasc@labvm:~/Documents$ ls -l myfile.sh

-rwxr-xr-- 1 self test 15 Mar 30 21:24 myfile.sh

Which two statements describe the permissions assigned to the file? (Choose two.)

• • Any user in the self group can read, modify, and execute the file.

• • The user with the user ID of self can modify the file.

• • The user with the user ID of devasc can modify the file.

• • All users can execute the file.

• • Any user in the test group can execute the file.

Which Python command creates a conditional control structure?

• • def

• • delay

• • from

• • if

A user enters the commands as shown. What is the result after the mv command is entered?

devasc@labvm:~/Documents$ pwd

/home/devasc/Documents

devasc@labvm:~/Documents$ mv myfile.sh ../Desktop/myfile2.sh

• • The file myfile.sh is copied to the /home/devasc/Desktop directory and renamed as myfile2.sh.

• • The file myfile.sh is copied to the /home/devasc/Desktop directory and replaces the file myfile2.sh.

• • The file myfile.sh is copied and renamed to myfile2.sh in the current directory.

• • The file myfile.sh is moved to the /home/devasc/Desktop directory and renamed as myfile2.sh.