1z0-106 Questions Bank

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Question 12

Which two statements are true about the at and batch commands?

Options:

batch schedules the execution of recurring tasks.

at schedules the execution of recurring tasks.

Both at and batch read from standard input, or you can specify a file and execute the commands with the -f option.

batch executes a task when the system load average is greater than 0.8.

at executes a one-time task to run at a specific time.

Question 13

You must add an additional swap device and you add this entry to /etc/fstab:

/.swapfile none swap defaults 0 0

Examine these commands and output:

# dd if=/dev/zero of=/.swapfile bs=1024 count=1048576

1048576+0 records in

1048576+0 records out

1073741824 bytes (1.1 GB, 1.0 GiB) copied, 4.32499 s, 248 MB/s

# swapon -a

swapon: /.swapfile: insecure permissions 0644, 0600 suggested.

swapon: /.swapfile: read swap header failed

Which two actions must you perform to add this swap device?

Options:

Initialize the .swapfile file by using the mkswap command.

Execute swapon -all.

Change defaults to user in the /etc/fstab entry.

Assign a label to the .swapfile file by using the swaplabel command.

Execute swapon -L swapfile /.swapfile after adding a label.

Use a physical disk partition type of 82 (Linux swap).

Question 14

Examine this command and output:

$ ftp host01.example.com

Connected to host01.example.com (192.168.40.131).

220 (vsFTPd 3.0.2)

Name (host01.example.com:oracle):

After entering a carriage return, this error message is displayed:

530 Permission denied

ftp>

Why is the oracle user denied access to the FTP server on host01.example.com?

Options:

The oracle user does not exist on host01.example.com.

LOCAL_ENABLE is set to NO in /etc/vsftpd/vsftpd.conf.

The oracle user is listed in /etc/vsftpd/user_list and USERLIST_ENABLE is set to NO in /etc/vsftpd/vsftpd.conf.

The oracle user is listed in /etc/vsftpd/ftpusers.

The oracle user is listed in /etc/vsftpd/user_list and USERLIST_ENABLE is set to YES in /etc/vsftpd/vsftpd.conf.

Question 15

The ss command was invoked with options to:

limit output to all listening and non-listening TCP ports

display ports instead of the protocols that typically use those ports

display all available internal TCP information

display only connections whose source or destination port is 80

Which two results are produced by the command?

Options:

UNCONN 0 0 [::1]:323 [::]:*

tcp CLOSE-WAIT 32 0 server.example.com:44732 12.21.0.15:https

ESTAB 0 0 10.12.18.92:50384 169.254.169.254:80 cubic wscale:9,7 rto:201 rtt: 0.226/0.113 ato:40 mss:8948 pmtu:9000 rcvmss:1728 advmss:8948 cwnd:10 bytes_sent:142 bytes_acked:143 bytes_received:1728 segs_out:4 segs_in:3 data_segs_out:1 data_segs_in:1 send 3167433628bps lastsnd:11351 lastrcv: 11351 lastack:11351 pacing_rate 6334867256bps delivery_rate 504112672bps delivered:2 app_limited rcv_space:62720 rcv_ssthresh:56588 minrtt:0.142

LISTEN 0 511 *:80 *:* cubic cwnd:10

icmp6 UNCONN 0 0 *:58 *:*