Juniper Juniper Certifications JN0-690 Questions & Answers

• Question 61:

  Given the example shown below:

  Emergency boot media > flash disk > _____

  What is missing from the default boot list?

  A. LAN

  B. USB

  C. PCMCIA card

  D. hard disk

  Correct Answer: D

• Question 62:

  You are notified about a router reboot event.

  Which command would be helpful in determining the reason for the last reboot?

  A. show chassis craft-interface

  B. show system reboot

  C. show chassis routing-engine

  D. show system snapshot

  Correct Answer: C

• Question 63:

  What is the name of the routing protocol process on a Junos OS device?

  A. chassisd

  B. snmpd

  C. rpd

  D. cosd

  Correct Answer: C

  The Routing Process Deamon (RPD) handle Routing. COSD handle Class of service.

• Question 64:

  Which statement is correct about troubleshooting?

  A. You must always have a complete understanding of the problem before you begin gathering any information.

  B. You must be sure the problem will be resolved before attempting a potential solution.

  C. The problem must be reproducible before attempting a potential solution.

  D. Establishing a network baseline is important to help understand when something is not working.

  Correct Answer: D

• Question 65:

  Which three steps are involved in troubleshooting any problem? (Choose three.)

  A. Reboot the device.

  B. Clearly define the problem.

  C. Outline the expected behavior.

  D. Determine who made the changes.

  E. Isolate the problem.

  Correct Answer: BCE

• Question 66:

  Which operational CLI command would you use to display information about the system and software processes?

  A. show system

  B. show chassis

  C. show route

  D. show cli

  Correct Answer: A

  Show route will only show you routing, show system will show you software related information:

  >show system ? Possible completions: alarms Show system alarm status audit Show file system MD5 hash and permissions auto-snapshot Show auto-snapshot status when system booted from alternate slice autoinstallation Show autoinstallation information autorecovery Show autorecovery information boot-messages Show boot time messages buffers Show buffer statistics certificate Show installed X509 certificates commit Show pending commit requests (if any) and commit history configuration Show configuration information connections Show system connection activity core-dumps Show system core files directory-usage Show local directory information download Show status of downloads firmware Show all firmware version information health Show online diagnostic status license Show feature licenses information login Show system login state memory Show system memory usage processes Show system process table queues Show queue statistics reboot Show any pending halt or reboot requests resource-cleanup Show resource cleanup information rollback Show rolled back configuration services Show service applications information snapshot Show snapshot information software Show loaded JUNOS extensions statistics Show statistics for protocol storage Show local storage data threads Show system threads table uptime Show time since system and processes started users Show users who are currently logged in virtual-memory Show kernel dynamic memory usage

• Question 67:

  In the Junos OS, which type of file dumps the program's environment in the form of memory pointers, instructions, and register data to a file in the event of a panic or other serious malfunction?

  A. log file

  B. backup file

  C. configuration file

  D. core file

  Correct Answer: D

  Junos will under a panic create a core-dump file, definitely not a backup file. > show system core-dumps /var/crash/*core*: No such file or directory /var/tmp/*core*: No such file or directory /var/tmp/pics/*core*: No such file or directory /var/crash/kernel.*: No such file or directory /tftpboot/corefiles/*core*: No such file or directory

• Question 68:

  Which CLI command applies the candidate configuration to the active configuration?

  A. load

  B. merge

  C. copy run start

  D. commit

  Correct Answer: D

  Copy run start is a Cisco specific command and is nowhere to be found in Junos. >commit Commit current set of changes

• Question 69:

  Which operational CLI command would you use to troubleshoot hardware-related problems?

  A. show system

  B. show chassis

  C. show route

  D. show cli

  Correct Answer: B

  Show route will only show you routing, show chassis will show you hardware related information.

  >show chassis ? Possible completions: alarms Show alarm status cluster Show chassis cluster information craft-interface Show craft interface status environment Show component status and temperature, cooling system speeds fan Show fan and fan tray information firmware Show firmware and operating system version for components forwarding Show forwarding process (fwdd) status fpc Show Flexible PIC Concentrator status hardware Show installed hardware components location Show physical location of chassis mac-addresses Show media access control addresses pic Show Physical Interface Card state, type, and uptime routing-engine Show Routing Engine status temperature-thresholds Show chassis temperature threshold settings usb Show chassis USB status

• Question 70:

  Which CLI command is used to restart a software process?

  A. restart

  B. reboot

  C. commit

  D. reload

  Correct Answer: A

  To restart a process one have to use restart , reboot is not even a valid command.

  Possible completions: restart Restart software process