10 interview question you are likely to be asked in Citrix XenApp Interview-2

Question 1– What is Citrix XML Service ?

Ans- A Windows service that provides an HTTP interface to the ICA
browser. It uses TCP packets instead of UDP, which allows connections to
work across most firewalls. The default port for the Citrix XML Service is 80.

Question 2–What is Session Reliability?

Ans- Session Reliability keeps sessions active and on the user’s screen when network connectivity is interrupted. Users continue to see the application they are using until network connectivity resumes. This feature is especially useful for mobile users with wireless connections. Take, for example, a user with a wireless connection who enters a railroad tunnel and momentarily loses connectivity. Session Reliability relies on Common Gateway Protocol (CGP)

Question 3–What is Local Host Cache (LHC) ?
Ans- Each XenApp server stores a subset of the data store in the Local Host Cache (LHC).The Local Host Cache is the name of the Microsoft Access Database that is created locally on every XenApp server and that stores portions of the Data Store to keep the server functioning in the event of an outage.

Question 4–What is Farm?

Ans- Farm is a collection of citrix servers which provide published applications to all users.

Question 5–What Happens when Datacollector is down?

Ans- The data collector is a role on a Citrix XenApp server which is collecting, maintaining and managing dynamic information about the farm and zone. The data collector also passes the user to the least busy serve

If your ZDC fails, an automatic election would occur and the next preferred server would become the data collector for the zone. However, the ZDC being down wouldn’t prevent users from launching apps unless it’s the only box specified in your WI site.

Question 6–What is the purpose of the Data Collector in Citrix XenApp?
Ans- Data Collector is nothing but it keeps the information about the published application, user’s session, Zones etc.

Question 7–What is the purpose of Zones in Citrix XenApp ?
Ans- Zone is subset of Farm and is designed so that we could use Farm as a unit. Zone has server members and one of them is ZDC (Zone Data Collectors) in each zone. These ZDCs communicate between zones. Zones are very helpful in controlling traffic.

Question 8–How to change the ICA port?
Ans-  Change value of TCP/IP port for ICA Terminal Sessions.
      ICAPORT {/QUERY | /PORT:num | /RESET}
      QUERY Query current setting.
      PORT:num Change the TCP/IP port to 'num'.
      RESET Reset the TCP/IP port to 1494.

Question 9–How to change the xml service port?
Ans-  Use the command line utility ctxxmlss
From the services applet stop the xml service
At a command prompt type:
ctxxmlss /u
ctxxmlss /rxxxx (where xxxx is the new port number)
RESTART the xml service from the services applet.

Question 10–What is Independent Management Architecture (IMA) service and its role?

Ans-  Independent Management Architecture Service (or IMA) provides the communication between servers in your Citrix environment. The types of data that are used through this service would be sessions, server load, licenses, and other data that you can view in your management tools. This communication exists on TCP port 2512 by default. With the help of IMA, individual XenApp servers can be united to create large farms with hundreds of servers. Such server farms allow the central configuration and the control of all nodes involved.

With introduction of XenApp 7.5 The platform architecture is now powered by FMA and not Independent Management Architecture (IMA) anymore thus providing enhanced scalability and ease of management

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10 interview question you are likely to be asked in Citrix XenApp Interview-1