Thursday, 11 April 2019

ServiceNow Discovery Exam Preparation Part 2

What does ‘.’ Or ‘.ssh’ indicates
a.      Hidden Directory

2.     Can ServiceNow retrieve credential from external credential repository?
a.      Yes (Discovery External credential storage plugin has to be enabled to use this functionality)

3.     Credential for SNMP do not user Username just a Password (The community string) (True / False)
a.      True

4.     If SNMP device uses, Access Control List then what you have to do?
a.      MID Server IP Address must be added to MID Server access List to successfully communicate with SNMP devices

5.     Can we configure multiple port per port probe?
a.      Yes

6.     Protocol vs Port
a.      SSH  on 22
b.     WMI on 135
c.      SNMP on 161

7.     What is the minimum batch size?
a.      256 IP because batch size below 256 IP Address do not benefit from clustering. The UI policy convert any value below 256 to value 0.

8.     How to determine record is for probe or sensor?
a.      Sensors record are in Input queue & records are in output queue.

9.     If discovery does not go beyond Port Scan, what can be the issue?
a.      You can assume connectivity issue

10. If discovery does not get past classification phase, what can be the issue?
a.      Authentication issue

11. How to validate permission from MID Server?
a.      Putty for SSH
b.     Webmtest for WMI
c.      iReasoning for SNMP

12. what can be the issue if information is not returned as expected?
a.      Trigger probe or custom probe/Pattern not configured properly.

13. What can be the issue when information returned in XML payload but not shown in form?
a.      Custom sensors not scripted properly.

14. What can be the reason when discovery does not get passed from identification phase?
a.      One of the reason is “Duplicate records are found during field based matching” and Reconciliation Duplicate task will be created.

15. Application dependency view displays which dependency?
a.      Host to App (Putty depends on SSHD)
b.     App to App (Putty runs on Windows Server)
c.      Both   ------ Correct

16. Why Process Handler?
a.      Process handler can to configured to help with the situations where the parameter might contain changeable port.
b.     It can overwrite the data gathered from process on the running process list for the discovered host.
c.      It can make sure that the data is same after restart by running a script and therefor eliminating duplicate CI’s.
d.     All           ----------------- Correct

17. How many CI Identifier we can have per CI class?
a.      2
b.     4
c.      1    ------------- Correct
d.     7

18. We should have same capabilities for all MID Server in cluster?
a.      True

19. Which check box we need to select to process Shazzam probe among multiple MID Server?
a.      Shazzam cluster Support

20. When MID Server fails which Business Rule selects next highest available MID Server?
a.      MID Server Cluster Management Server

21. How many type of extend discovery are available?
a.      Classifiers*
b.     Probe & Sensors
c.      Discovery Patterns

22. What sensors does in Discovery?
a.      Parse the result returned from probe and posted to the ECC queue as an input record.
b.     Can update the CMDB
c.      Can trigger other probe

23. Steps to extend discovery using Probe & Sensors.
a.      Create probe (Under Discovery Definition)
b.     Create Sensor (Attach previously created probe to this sensor)
c.      Associate new probe to server (Under Ci Classifier)

24. Can we pass multiple commands while creating new probe?
a.      Yes! We can but need to select “muliprobe” as probe type.

25. How may type of horizontal discovery pattern are available?
a.      Infrastructure
                                                                   i.      Used to target Server or Host.
b.     Application
                                                                   i.      Used to target application running on servers or Hosts.
1.     Can be identify by running process or TCP Connection.

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