Which statement about symmetric encryption is correct?

A. The same key is used for encryption and decryption.

B. Symmetric keys are generally longer than asymmetric keys.

C. Asymmetric encryption is generally faster than symmetric encryption.

D. A public key and a private key are needed for symmetric encryption/decryption.

What is the difference between the /dev/st0 and /dev/nst0 devices?

A. /dev/st0 is the first SCSI CD burner; /dev/nst0 refers to the CDROM drive.

B. /dev/st0 is the first tape drive; /dev/nst0 refers to the same tape drive in non-rewinding mode.

C. /dev/st0 is the first serial console; /dev/nst0 refers to the same serial console as a block device.

D. /dev/st0 is the first SCSI hard drive; /dev/nst0 refers to the same SCSI hard drive in read-only mode.

You would like to run command2 only if command1 did not complete successfully. Which command accomplishes this task?

A. command1 ;; command2

B. command1 || command2

C. command1 >> command2

D. command1 andand command2

Which statement about the primary (default) group of a user is correct?

A. The primary group membership of a user is defined in the /etc/group file.

B. The primary group membership of a user is defined in the /etc/shadow file.

C. The primary group membership of a user is defined in the /etc/passwd file.

D. The primary group membership of a user is defined in the /etc/gpasswd file.

In the bash shell, which command can be used to create a MY_NAME variable containing the value Joe?

A. MY_NAME=Joe

B. MY_NAME = Joe

C. echo Joe > MY_NAME

D. export MY_NAME = Joe

In which file is the host name of a Linux computer configured? (Hint: You do not need to include the entire path.)

A. /etc/HOSTNAME

You have a test directory with the following permissions: rwx------ You want to change the permissions to the following values: r-xr-xr-x. Which command accomplishes this?

A. chmod 777 test

B. chmod u=rx,a-rx test

C. chmod u-w,g+rx,o+rx test

D. chmod u+w,g+rx,o+rx test

In a terminal window, which command can you enter to change to your home directory (/home/geeko)? (Choose 2.)

A. cd

B. cd ~

C. cd -h

D. cd home

E. cd --homedir

What is the result of the following command? (Choose 2.)

dd if=/dev/zero of=/dev/hdd bs=512 count=1

A. Overwrites an existing partition table

B. Creates a LVM partition of 512 blocks

C. Backs up the /dev/zero and /dev/hdd files

D. Writes zeros in the first 512 bytes of the first hard disk block

E. Assigns the physical volume zero to the logical volume hdd

You do not want to see any error messages when using the find command; you want to see only the results. Which command accomplishes this task?

A. find /etc -name "*conf" 0>/dev/null

B. find /etc -name "*conf" 1>/dev/null

C. find /etc -name "*conf" 2>/dev/null

D. find /etc -name "*conf" 3>/dev/null