Friday, September 29, 2017

QV30 Qlikview Interview Questions

QlikView Interview Questions:


QlikView Architecture:
1. Optimized and Unoptimized QVD Load Situations?
2. Explain 3 tier architecture implementation while deploying QlikView Application?
3. Briefly explain how does QlikView storage the data internally?
4. What are the restrictions of Binary Load?
5. How are NULLS implemented in QlikView?
6.How do you optimize QlikView Application? (What tools are used and where do you start?)
7. What is the difference between Subset ratio & Information Density?

QlikView Scripting:
1. What is the difference between ODBC, OLEDB & JDBC?
2. What is the use of Crosstable prefix in QlikView Load Script?
3. What is Mapping Load & ApplyMap()?
4. What is the difference between Map Using and Mapping Load?
5. Synthetic keys in QlikView and how & when to avoid them?
6. Difference types of Joins in QlikView?
7. What is the difference between Join and Keep?
8. How do you use Having clause (SQL Equivalent) along with Group By in QlikView?
9. Explain IntervalMatch function in QlikView?
10.Explain Concatenation, No Concatenation & Auto Concatenation?
11.Explain how to implement Incremental Load?
12.What is Circular Loop and how do you avoid it?
13.Explain Exists() function in QlikView and when do you use this function?
14.What is Generic Load in QlikView?

QlikView Expression Language / UI:
1.Explain Aggr Function?
2.What is the use of FirstSortValue in QlikView?
3.What are Set Modifiers and Set Identifiers?
4.What is P() & E() and where do you use them?
5.What is the difference between ValueList() and ValueLoop()?
6.What is Partial Reload? Why do you use “ONLY” Qualifier?
7.Difference between Cyclic Group & Drilldown Group?
8.Explain Alternate States? Where do you use them?

QlikView Security:
1. Describe Section Access Architecture?
2.Difference between Authentication & Authorization in QlikView? How to implement them?
3.Difference between File System Security vs Section Access?
4.Explain “Strict Exclusion” while implementing Section Access? What are the implications of not using them?
5.How do you implement Section Access on hierarchy based data?


QlikView Server & Publisher:
1. What are the multiple protocols defined for client communication with QVS?
2.Explain different communication encryptions for Windows Client & AJAX Client?
3. What is the use of Anonymous User Account in QVS?
4. What are the different types of CALS and Explain them?
5. What are the different editions of QlikView Server?

General:
1. Difference between Star & Snow Flake Schema?
2. Difference between RDBMS & Associative Database?
3. Ragged hierarchies in DataWareHousing?
4. Explain EAV data Modelling Technique?
5 What are slowly changing dimensions?



========================================================

1. Whats your role in your project
2. Whats your daily activity in your project
3. Requirement Gathering
4. Tell me about your project
5. What is the major KPI s in your project
6. What is Dashboard
7. What type of architecture are you using in your project
8. What type of schema are you using in your project. and why
9. Difference between Star & Snowflake schema
10. What is Peek, Previous, Apply map, Interval Match
11. Whats is the difference between Pick and Match
12. What is Fuzzy search
13. How many charts are you used till now
14. Have you used macros in your project and why
15. Whats the difference between QV versions
16. Have you used Alternate states and why
17. How many dimensions are used in Guage Chart
18. What is set analysis
19. Best datamodelling techniques
20. You have any knowledge about QV server and Publisher
21. What is Incremental Load
22. Have you Create Add hoc reports in your project And how
23. Any knowledge about Data Island
24. DMS authorization
24. Section Access
25. Conditional enabling
26. Difference between join and keep
27. Difference between Concatenate and join
28. String Functions
29. Binary Load, Preceding Load, Partial Load
30. How many ways you can maintain to store the QVD's


1. Qlikview 11 features
2. What is Circulat loops
3. What is Synthetic key, is it good or bad having?
4. What P() and E() in Set analysis?
5. What is Comparitive analysis?
6. What is Mekko chart and what is the difference between bar and Mekko chart?
7. What is the difference between Pivot, Straight and Table box?
8. How you connect to Database?
9. What are the various data sources for Qlikview?
10. What is partial reloading?
11. How you refresh you dashboards periodically?
12. What are the different types of CALs available?
13. What are the various joins available in Qlikview?
14. How you use Macros in Qlikview?
15. How you optimize Qlikview dashboards?
16. What care should be taken while designing a datamodel?
17. How you test your Dashboard?
18. Types of authorization in Qlikview?
19. Difference between Join and Concatenate?
20. What is NoConcatenate?

Wednesday, March 15, 2017

failed to load the jni shared library

After installation of java 1.6 from post, i tried to start SpagoBIStudio_5.1.0 using below command

SpagoBI.exe -vm "C:\Program Files (x86)\Java\jdk1.6.0_30\bin"

it failed with error "failed to load the jni shared library"

Problem :
incorrect version of java used

Solution :
I am trying to start 64 bit version of spagoBI server with 32-bit version of java.
install 64-bit versionof java and then try below command

SpagoBI.exe -vm "C:\Program Files\Java\jdk1.6.0_30\bin"

java was started but returned exit code 13

try to start SpagoBIStudio_5.1.0 studio

java was started but returned exit code 13

Problem:
I have installed java (1,7/1.8) on system, because of spagoBI compatibility issue, was using incorrect version of java.

Solution:
Install correct version of Java (in my case it is 1.6)

Thursday, February 23, 2017

Add Random Data in Spreadsheet

To add random data in spreadsheet you can use macro code, advantage to use this no more manual work. Use below code to generate data.

Public Sub ran()
Dim b As Range
    For i = 1 To 800000
        Dim r As Double
        r = Int(Timer * Rnd())
        Cells(i, 20).Value = 0
        Cells(i, 21).Value = "USD"
        Cells(i, 22).Value = ""
        Cells(i, 23).Value = "A clever fox just jump over the lazy dog"
        Cells(i, 24).Value = r
    Next i
End Sub

Dynamic data generated in "r" variable and rest of data is static.

Friday, February 10, 2017

Talend Startup Error

I have installed java 1.7 and 1.8 both on my machine and JAVA_HOME environment variable set to 1.7.
Here i am trying to start talend but it throws error:


"The Studio does not support Java 8. Java 7 is the recommended JVM version to be used"

Now how to start Talend on machine if both java version is installed on your machine

Solution

  • Open Cmd
  • Move to installed directory of Talend and run below command
  • TOS_DI-win32-x86.exe -vm "C:\Program Files (x86)\Java\jdk1.7.0_65\bin"

Friday, January 27, 2017

Xampp Starting Error

Try to start xampp on some day and getting below error


"Port 80 in use by "unable to open process" with PID 4:

How to proceed:
  • Open Task manager
  • Look for the PID with number 4, probable it will be "NT Kernel and system"
  • Open CMD and check the processes that are running with port number 80
netstat -o -n -a | findstr 0.0:80

  • After searching on google, came to know that the PID process is related to SQL server Reporting server. 
  • Go to services
  • Stop all services related to SQLServer
  • Stop and start services for apache and mysql
  • It Works!!!!


Other Possible Processes :

Skype
IIS
VMWork Station

web stats