Oracle 1Z0-100 Online Practice Questions and Exam Preparation

Oracle 1Z0-100 Online Questions & Answers

• Question 1:

  Which two Statements are true concerning the configuration and use of cron and anacron?

  A. Anacron jobs are used to make sure cron jobs run if the system had been down when they were meant to run.
  B. All crontabs are held in the /etc/cron.d directory.
  C. Cron jobs may run as frequently as once a minute.
  D. Anacron jobs may run as frequently as once a minute.
  E. The crond daemon looks for jobs only in /etc/crontab.
  C. Cron jobs may run as frequently as once a minute.
  E. The crond daemon looks for jobs only in /etc/crontab.

  ---

  Note: Anacron is the cron for desktops and laptops.

  Anacron does not expect the system to be running 24 x 7 like a server.

  When you want a background job to be executed automatically on a machine that is not running 24 x 7, you should use anacron.

  Incorrect:

  not D: /etc/anacrontab file has the anacron jobs mentioned in the following format.

  period delay job-identifier command

  Field 1 is Recurrence period: This is a numeric value that specifies the number of days.

  1 daily

  7 weekly

  30 monthly

  N This can be any numeric value. N indicates number of days

• Question 2:

  Examine the command and output shown:

  bash-4.1# 1s

  1s: error while loading shared libraries: libselinux.so.1: cannot open shared object file: No such file or directory

  No files have been deleted from your system and you want to determine the cause of the error.

  Which two commands or utilities can help the root user diagnose this problem?

  A. ldd
  B. dmesg
  C. grep libselinux.so.1 /var/log/dmesg D. strace
  E. grep libselinux.so.1 /var/log/message
  A. ldd

  ---

  To diagnose the problem, use the following commands:

  ldd /usr/bin/ls and ldd /cat

  strace -o /tmp/ls.strace -f su - root -c ls Reference: http://www.experts-exchange.com/OS/Unix/Q_25150132.html

• Question 3:

  Which four statements correctly describe the contents of the sysfs filesystem?

  A. It contains kernel parameter files.
  B. It contains metadata on all block devices.
  C. It contains metadata on firmware.
  D. It contains metadata on all loaded modules in the kernel.
  E. It contains metadata on device classes.
  F. It contains metadata on system uptime.
  B. It contains metadata on all block devices.
  C. It contains metadata on firmware.
  D. It contains metadata on all loaded modules in the kernel.
  E. It contains metadata on device classes.

  ---

  Reference: https://www.kernel.org/pub/linux/kernel/people/mochel/doc/papers/ols- 2005/mochel.pdf

• Question 4:

  Match the bash files with their correct description: (Choose the best answer.)

  File name Description

  1) /.bash_history a. a list of commands to be executed when you log in 2) /.bash_logout b. a list of commands that is executed every time you open a new shell 3) /.bash_profile c. a list of commands you have executed from a bash shell 4) /.bashrc d. a list of commands to be executed when you exit a login shell

  e.

  a list of commands executed before the current day

  f.

  a list of commands executed when a shell script has a nonzero return code

  A. 1-c, 2-d, 3-a, 4-f
  B. 1-c, 2-b, 3-d, 4-a
  C. 1-c, 2-d, 3-a, 4-b
  D. 1-e, 2-c, 3-a, 4-d
  E. 1-c, 2-d, 3-b, 4-f
  C. 1-c, 2-d, 3-a, 4-b

• Question 5:

  Which two statements are true concerning an MSDOS partition table? (Choose two.)

  A. It does not support disks with more than 1024 cylinders
  B. It can be used on the boot disk
  C. It supports either four primary partitions or three primary partitions and one extended partition
  D. It can be used on disks up to four terabytes in size E. It supports named partitions
  B. It can be used on the boot disk
  C. It supports either four primary partitions or three primary partitions and one extended partition

• Question 6:

  What is the main advantage of the Oracle Unbreakable Enterprise Kernel compared with the Red Hat compatible kernel?

  A. It is more secure and, therefore, more difficult to hack.
  B. It has a lower Mean Time Between Failures.
  C. It provides higher availability for applications by reducing Mean Time to Recovery.
  D. It scales better for more CPUS, memory, and Infiniband network connections.
  D. It scales better for more CPUS, memory, and Infiniband network connections.

  ---

  The Unbreakable Enterprise Kernel, for those who want to leverage the latest features from mainline Linux and boost performance and scalability. The Red Hat Compatible Kernel, for those who prefer strict Red Hat kernel ABI (kABI) compatibility.

• Question 7:

  During the setup of additional swap space on an ext2 filessystem, you encounter an error as shown below:

  

  Which action must you perform to add additional swap space?

  A. Create a symbolic link /dev/swapfile that points to u01/swapfile.
  B. Reinitialize /u01/swapfile by issuing mkswap L swapfile /u01/swapfile.
  C. Re-create the swapfile on an ext3 or ext4 filesystem.
  D. Change LABEL=swapfile to /u01/swapfile in the appropriate /etc/fstab entry.
  E. None, because adding filesystem based swap space is not supported.
  C. Re-create the swapfile on an ext3 or ext4 filesystem.

• Question 8:

  Examine the commands used by root to create the chrooted environments in the /jail directory:

  # mkdir /jail/bin/jail/lib64

  # cp /bin/bash/jail/bin

  linux-vdso.so.1 => (0x00007fff68dff000)

  libtinfo.so.5 => /lib64/libtinfo.so.5 (0x00000033e00000)

  lid1.so.2 => /lib64/libc.so.6 (0x00000033e1600000)

  /lib64/id-linix-86-64.so.2 (0x00000033e0e00000)

  # cp /lib64/libtinfo.so.5/jail/lib64

  # cp /lib64/libd1.so.6 /jail/lib64

  # cp /lib64/libc.so.6 /jail/lib64

  # cp /lib64/id-linux-x86-64.so.2 /jail/lib64

  The user root then issues this command:

  # chroot /jail

  What is the output from the cd, pwd, and 1s commands?

  A. bash-4.1# cd bash-4.1# pwd /root bash-4.1# 1s bash" 1s: command not found
  B. bash-4.1# cd bash: cd: /root: No such file or directory bash-4.1# pwd / bash-4.1 # 1s bash: 1s: command not found
  C. bash-4.1# cd bash: cd: command not found bash: pwd: command not found bash-4.1# 1s
  D. bash: 1s; # cd bash: cd: /root: unable to access chrooted file or directory /root bash-4.1# pwd / bash-4.1 # 1s bin lib64
  E. bash-4.1# cd bash: cd: /root: No such file or directory bash-4.1# pwd / bash-4.1# 1s bin lib64
  A. bash-4.1# cd bash-4.1# pwd /root bash-4.1# 1s bash" 1s: command not found

• Question 9:

  Your Oracle Linux server has a network interface eth0 but the ifcfg-eth0 file is missing from the /etc/ sysconfig/network-scripts directly.

  To set the IP address for the interface, you run this command as root:

  [root@station1]# ifconfig eth0 192.168.0.1 up

  What is the effect of the command?

  A. The IP address 192.168.0.1 is not assigned to eth0 because the netmask is not specified.
  B. The IP address 192.168.0.1 is assigned to eth0, but the interface is not activated until the network service is reloaded.
  C. The IP address 192.168.0.1 is assigned to eth0, but the interface is not activated until the network service is restarted.
  D. The IP address 192.168.0.1 is assigned to echo with the default netmask for that address, and the interface is activated immediately.
  C. The IP address 192.168.0.1 is assigned to eth0, but the interface is not activated until the network service is restarted.

• Question 10:

  Examine the commands and output shown:

  

  What is the cause of this connection refusal? (Choose the best answer.)

  A. The web server has no documents to serve B. The firewall blocked the connection due to an unintended rule blocking localhost port 80
  C. The web server is not listening on the local loopback adapter
  D. The system has no route to localhost
  B