Citrix NetScaler Interview Questions & Answers

Question 1. Explain The Use Of Shadowing In Citrix?

Answer :

In Citrix, shadowing resembles for one user to join remotely to another user.  One user can use the session of another user remotely.

Question 2. Explain What Is The Purpose Of Zones?

Answer :

Data collector stores information about Zones, User’s Session and Published Application.

• A Farm consists of a subset referred as Zones
• It consists of various server members
• One of the server members is referred as Zone Data Collector
• In traffic controlling, Zones are useful
• Using ZDCs communication is established among zones

Question 3. Explain How You Can Remove Dead Server From The Citrix Management Console?

Answer :

To remove dead server from the Citrix Management Console you have to run:

• DSVERIFY SERVERS/CLEAN/FORCE for optimizing the Data Store
• DSVerify can be executed on any of the servers in the farm

MetaFrame feature release 3 has a command line tool known as DSCHECK:

• Use the following command DSVerify command line tool DSCHECK/CHECK
• or right click on the ‘server in the farm’ and select option ‘remove from the Farm’

Question 4. Explain What Is Citrix Access Gateway?

Answer :

CAG or Citrix Access Gateway is a universal secured socket layer virtual private network appliances. It got features like IPSec and SSL VPN.  It also enables instant access to the users and secure access to the company.  Any information resource can be retrieved by using CAG with secure, single point access, always on features.  It supports various types of applications including IP telephony.  Any application which is hosted on Citrix Presentation Server can be used in a secured manner.

Question 5. Explain What Is Citrix Receiver?

Answer :

Citrix receiver is a collection of suite of products that enables client devices to connect to various desktop virtualization services offered by Citrix.  Citrix receiver can link with client devices to XenDesktop applications, XenApp and desktops via the HDX protocol.

Question 6. Mention What Is The Limit Of Refresh Time For Local Host Cache In Citrix?

Answer :

The refresh time set for Local Host Cache is 30 minutes, it can be created when IMA is stopped.

Question 7. List Out The Load Evaluators That Are Supported In Citrix?

Answer :

Load evaluators that are supported in Citrix includes:

• Memory Utilization
• CPU Utilization
• IP Range
• Page Swap
• Page Fault
• Context Switches
• Disk Data I/O
• Scheduling
• Server Application Load
• User Application Load

Question 8. Explain What Is Lhc In Citrix?

Answer :

The IMA service executing on each Presentation Server downloads the information it requires from the central data store into a local MDB database known as  the Local Host Cache or LHC.

Question 9. Mention What Are The Default Tests Available In Health Monitoring & Recovery Tool?

Answer :

The tests in XenApp Health Monitoring and Recovery Tool are

• Citrix IMA service test
• Logon Monitor test
• Terminal Service test
• XML Service Test

Question 10. Explain What Is The Step To Clear Xenserver Cache?

Answer :

To clear XenServer cache you have to use command Dnscmd Server Name/clearcache.

Question 11. Explain What Is Citrix Xml Broker?

Answer :

Citrix XML broker behaves as an intermediary between the web interface and farm.  It receives the credentials of the user from the web interface. It retrieves the applications that have user permission to access.  It is done by independent management architecture and returns to the web interface. XML broker detects the server in the farm, once the user is authenticated.  It returns the address of the service rendering server to the web interface.  It functions between IMA service and web interface.

Question 12. Mention What Is Web Interface Or Nfuse?

Answer :

Citrix web interface software provides web access to Java, Unix and Windows applications which are hosted via Citrix application server software. Citrix offers server side control of hosted applications, while Citrix web interface makes applications accessible through a web browser interface.

Question 13. Mention What Is The Query Command In Citrix?

Answer :

Query command in Citrix includes

• qfarm
• querydc
• queryds
• queryhr

Question 14. List Out The Ports Associated With Citrix Services?

Answer :

• Default port is A: 1494
• Default listening port for Citrix XML service: 80
• For ICA: 1494
• UDP port used for client broadcasting: 1604
• IMA port: 2512 and 2513
• CMC and SSL port: 443
• Server to SQL port: 1433
• Session Reliability: 2598
• Port Number for licensing: 27000

Question 15. Explain What Is Data Store?

Answer :

Data store is a DATABASE which consists of all the configuration information needed by the Citrix farm.  Changes can be made at any time to the Meta Frame Server. The changes are persisted in the data store.  It will data store following information like

• Server configuration
• User configuration
• Print Environment
• Published Application

Question 16. List Out The Services Provided By Citrix?

Answer :

Service provided by Citrix includes

• Citrix virtual memory optimization service
• Encryption service
• Citrix XTE service
• Independent Management architecture
• Citrix SMA service
• COM (Common Object Model) services

Question 17. List Out The Major Citrix Components?

Answer :

Major Citrix components are

• XenApp:It allows to host applications on central servers and enables users to interact with them remotely and deliver it to the user’s devices for local executions
• XenDesktop:It is the practice of hosting a desktop OPERATING SYSTEM with a virtual machine running on a remote SERVER
• XenServer:It enables you to combine multiple Xen-enabled servers into a powerful resource pool using industry standard shared storage architecture and leveraging resource clustering technology created by XenSource
• Provisioning Server:It reduces the number of systems that they manage, even as the computers number continues to grow.
• Netscaler: It is used to provide level 4 load balancing

Question 18. Explain What Is Citrix?

Answer :

It is an application deployment system. With Citrix, one can access the customized application and can also delivered to remote systems. It also allows file transfer from home computer to office computer and e-mail accessing.

Question 19. What Free Tool From Citrix Will Allow You To Analyze Your Log Files, Profile Your Citrix Environment, Scan For Known Issues And Attach A Log File To A Citrix Support Ticket?

Answer :

Citrix Insight Services or TaaS

Question 20. Citrix Storefront Displays Applications Differently Than Web Interface. Instead Of Having All Accessible Applications Appear On The Home Screen, First Time Users Are Invited To Choose (subscribe) To The Applications They Want To Regularly Use After They Logon. What Function In Storefront Must You Use To Avoid Users Having A Blank Screen And Automatically Subscribe Users To A Few Core Applications When They First Logon?

Answer :

Keywords

Question 21. You Are Preparing A Pvs Master Target Device Which Is Created On Vmware Vsphere Virtual Hardware Version 10 Or Higher. What Must You Do With The Cd/dvd Rom Setting For Pvs To Work Correctly?

Answer :

You will need to change the CD/DVD Rom to IDE instead of SATA. SATA is not supported in PVS.

Question 22. What Is The Major Financial Bottleneck Of Any Vdi Deployment?

Answer :

Storage. Traditionally, storage has been very costly in getting a comparable VDI end user experience as opposed to the local desktop experience. There are several vender solutions on the market now to address this.

Question 23. You Are Architecting A Citrix Provisioning Services (pvs) Deployment Which Will Be Placed Across Different Data Centres Via A Wan Link. You Only Want The Pvs Disks To Be Streamed In Each Local Data Centre And Not Cross Over The Wan. What Feature In Pvs Would You Use To Accomplish This?

Answer :

Subnet Affinity

Question 24. You Manager Has Requested You To Come Up With A Way For Your Help Desk To Monitor And Troubleshoot Your Xendesktop/xenapp 7.x Environment, Without Adding On A Third Party Solution. What Built In Citrix Functionality Would You Use To Do So?

Answer :

Citrix Director Enables level-1 and level-2 IT Support staff to monitor a XenDesktop deployment and perform day-to-day maintenance tasks. You can also view and interact with a user’s session, using Microsoft Remote Assistance, to troubleshoot problems.

Question 25. What Is The Role Of The Xendesktop Controller?

Answer :

A controller is the server-side architectural component of XenDesktop that is responsible for distributing desktops, managing user access, and optimizing connections.

Question 26. What Are The Two Most Common Ports Used On Xenapp Ica Sessions? What Are Each Used For?

Answer :

Ports 1494 (ICA/HDX) and 2598(Session Reliability)

Question 27. Can You Name Two Of The Services Required To Be Running On The Provisioning Server For It To Function?

Answer :

SOAP and STREAM services must be running on the PVS Servers.

Question 28. How Does Citrix Netscaler Licensing Differ From The Other Citrix Product Licensing?

Answer :

As an appliance or hardware, Netscaler is separate from most other Citrix products that use a license server. It is licensed independently.

Question 29. You Are Migrating Your Citrix Environment From A 2003 Os To 2008r2 Os, And You Want To Make Sure Your Current Applications Will Run Correctly On The 2008r2 Os. What Software Or Utility Does Citrix Provider You Help You Make Sure Your Applications Will Be Compatible On The 2008r2 Os Before The Migration?

Answer :

Citrix AppDNA

Question 30. You Are Creating A Xenapp/xendesktop Environment And Your Manager Asked You To Optimize Your Profiles Without Using A Third Party Solution. How Would You Accomplish This?

Answer :

Citrix has User Profile Manager, which will allow you to streamline your profiles and leverage Microsoft folder redirection.

Question 31. You Have Been Tasked To Come Up With An Active/active Gslb Scenario For Your Citrix Xendesktop Environment. What Are Some Underlying Factors You Should Consider During Your Research And Planning Phase?

Answer :

You want to make sure you have a working way for data replication, including profile replication between the two sites. Microsoft does not support two way replication for their profiles. You will also need to make sure you have a way to disconnect sessions from each site. It is best to use Active/Passive with manual failover in this scenario.

Question 32. You Will Be Migrating From Xenapp 6.5 To Xenapp 7.6, What Are Two Differences Between Ima And Fma?

Answer :

FMA uses Sites and no longer utilizes Zones or Zone Data Collectors, FMA uses Virtual Desktop Agents (VDA’s), FMA leverages MCS for Servers and Desktops, IMA uses Local Host Cache (LHC), IMA uses IMA Service.

Question 33. You Have Been Asked To Reduce The Time On Citrix Support Calls, By Making Sure Your Citrix Xenapp 6.5 Farm Is “citrix Support Ready” And Already Has The Proper Tools Installed Before Contacting Citrix, What Is The Main Tool You Would Install?

Answer :

Citrix Scout