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Juniper Junos Troubleshooting Sample Questions:

1. Given the example shown below:
Emergency boot media > flash disk > _____
What is missing from the default boot list?

A) USB
B) LAN
C) hard disk
D) PCMCIA card

2. In Junos, which process has its own internal task scheduler?

A) ppmd
B) mgd
C) rpd
D) chassisd

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

A) show system
B) show chassis
C) show cli
D) show route

4. Click the Exhibit button.
-- Exhibit -root@router> show system storage Filesystem Size Used Avail Capacity Mounted on /dev/da0s1a 742M 741M -6.6M 101% /junos/cf devfs 1.0K 1.0K 0B 100% /dev devfs 1.0K 1.0K 0B 100% /dev/ /dev/md0 494M 494M 0B 100% /junos /cf 742M 741M -6.6M 101% /junos/cf devfs 1.0K 1.0K 0B 100% /junos/dev/ procfs 4.0K 4.0K 0B 100% /proc /dev/bo0s3e 24M 108K 22M 0% /config /dev/bo0s3f 342M 110M 205M 35% /cf/var /dev/md1 168M 14M 141M 9% /mfs /cf/var/jail 342M 110M 205M 35% /jail/var devfs 1.0K 1.0K 0B 100% /jail/dev /dev/md2 39M 4.0K 36M 0% /mfs/var/run/utm /dev/md3 1.8M 4.0K 1.7M 0% /jail/mfs -- Exhibit -
Your device running the Junos OS has become slow and you obtain frequent errors when you try to make changes.
Referring to the exhibit, which three actions would resolve the problem? (Choose three.)

A) Use file delete or the shell subsystem to remove files from the /var/tmp directory.
B) Issue the request system software delete-backup command.
C) Enter the shell subsystem and issue the rm -rf /junos command.
D) Issue the request system storage cleanup command.
E) Issue the rollback 0 command to clear the unneeded configurations on the router.

5. Click the Exhibit button.
-- Exhibit -user@router> show chassis environment
Class Item Status Measurement Power Power Supply A OK Power Supply B Absent
Temp FPC 0 OK 28 degrees C / 82 degrees F FPC 1 OK 27 degrees C / 80 degrees F Power Supply A OK 22 degrees C / 71 degrees F Power Supply B Absent SSB 0 OK 30 degrees C / 86 degrees F Backplane OK 22 degrees C / 71 degrees F Routing Engine 0 OK 26 degrees C / 78 degrees F Routing Engine 1 Testing
Fans Rear Fan OK Spinning at normal speed Front Upper Fan OK Spinning at normal speed Front Middle Fan OK Spinning at normal speed Front Bottom Fan OK Spinning at normal speed
Misc Craft Interface OK -- Exhibit -
Referring to the exhibit, which two statements are true about the chassis? (Choose two.)

A) Routing Engine 1 has failed.
B) Power Supply B is not installed in the system.
C) Routing Engine 1 is installed in the system but is still initializing.
D) Power Supply B is installed in the system but has failed.

Solutions: