Introduction to QlikView Interview Questions and Answers
QlikView is the platform used to discover the various types of business according to company requirements or based on fulfilment done by the company. It has better features compare to BI Business Intelligence platforms. It is data analytics tools, which maintains the relationship between various kinds of data, and these can be demonstrated in various ways as per the company’s requirement. It provides many ways to search the data which can be a direct way or indirect ways as well. It can show data in the form of various kinds of lists. On the searched data, various kinds of color can be applied. Let us discuss the basic and advanced interview question and answer.
Below are the 10 important 2023 QlikView interview questions and answers:
It has features that provide processing of in-memory data, due to this it provides a very quick response to the user. It can calculate aggregations on the fly and compressed form of data to 10% of its original size. Developers and users of QlikView do not maintain the relationship between the data. It happens by the out of the box functionality of the QlikView.
Now, if you are looking for a job which is related to QlikView then you need to prepare for the 2023 QlikView Interview Questions. It is true that every interview is different as per the different job profiles. Here, we have prepared the important QlikView Interview Questions and Answers which will help you get success in your interview. These questions are divided into two parts are as follows:
Part 1 – QlikView Interview Questions (Basic)
This first part covers basic QlikView Interview Questions and Answers.
Q1. What are the Features of the QlikView?
Answer:
QlikView helps to create various kinds of reports from various data sources that help the company to demonstrate various topics. Few features are given below:
- Automatically Data association creation: It automatically recognizes the relationship between each piece of data stored in the dataset. Users do not need to reconfigure the relationship between different data entities.
- Date held into fast memory: It stores the structure of the data for various users in RAM for fast user experience which makes it the most attractive platform compared to other available platforms.
- Aggregations are calculated on the fly as needed: It stores the data in memory, calculations are done on the fly. So there is no need of storing pre-calculated aggregate values.
- Relationship Representation by color: Relationship among data is not shown by arrow or lines but by various colors. Selecting a piece of data gives specific colors to the related data and another color to unrelated data.
- Direct and Indirect searches: It provides the features to search the data in both ways direct and indirect way because of the association between the data. Instead of giving the direct value a user is looking for, a user can give some related data and get the exact result because of the data association.
- Data is compressed to 10% of its original size: It heavily uses the data dictionary. Only mandatory bits of data in memory are required for any analysis. Therefore, it compresses the original data into small size.
Q2. What is the difference between Keep, Join and Concatenate?
Answer:
This is the basic QlikView interview questions asked in an interview. In case of keep both the datasets are available in QlikView’s memory while in the case of the join the load statements produce only one dataset from which you have to choose the columns. There is no concept of the outer keep whereas we have outer join available in case of joins. Join gives the result from two tables as records containing columns form both tables. But Concatenate only appends the rows from one table with another.
Let us move to the next QlikView Interview Questions.
Q3. Explain the Synthetic key and how to avoid it in QlikView?
Answer:
In QlikView data structure, it is undesirable to have multiple common keys across multiple tables. Due to this QlikView may use the complex keys Synthetic key to generate the connections in the data structure. Synthetic keys use a heavy resource and may slow down calculations, in extreme cases, degrade the performance of the applications. This key also makes a document difficult to understand and maintain. There are some scenarios where synthetic keys cannot be avoided (Example- Interval Match tables), but, in general, synthetic keys should always be removed, if it is possible to comment the fields in load scripts rename the fields using UNQUALIFY operator.
Q4. Explain the Difference Between Straight table and Pivot Table?
Answer:
This is the basic QlikView Interview Question asked in an interview. A straight table is better in sorting than a Pivot table. We can sort it according to any columns. It is not good in the grouping. Subtotals are not possible in the Straight table.
While in the pivot table is very good in grouping we can easily see which group a specific row belongs to, and a group can have a subtotal also. But when you sort a pivot table, we have to sort it first according to the 1st dimension, then according to the next. we can display a pivot table like a cross table, pivot table does not support the sorting.
Q5. What is Resident Load in QlikView?
Answer:
Creating a new logical table in QlikView which will be based on a previously loaded (resident) table.
Part 2 – QlikView Interview Questions (Advanced)
Let us now have a look at the advanced QlikView Interview Questions.
Q6. Explain Set analysis in QlikView?
Answer:
In QlikView set, the analysis used for the set of groups mostly used for aggregation functions like sum (year) used sales of the current year vs last year
Q7. Explain about Normalized and Deformalized Data in QlikView?
Answer:
Normalized data are those which are well structured does not have any redundancy or duplicity. These data are relational data mostly used for OLTP kind of stuff while deformalized data are those data which having redundancy duplicity among them these data are used in OLAP.
Let us move to the next QlikView Interview Questions.
8. What are Modifiers in QlikView?
Answer:
In QlikView, modifiers are used to deals with the field’s name.
For example: sum({$<Region=>}Sales)
It will return the sales for current selection, but with the selection in “Region” is removed.
Q9. Explain the start schema in QlikView?
Answer:
This is the advanced QlikView interview questions asked in an interview. It is the easiest form of the dimensional model, in this model data is organized into facts and dimensions. A fact is an event that is counted or measured, like a sale or login. The dimension contains reference information about the facts, like date, product, or customer. Star schema is diagramed by surrounding each fact table with its associated dimensions table. The output diagram gives the star schema definition; it is the aggregation of data based on the set of known dimensions. It stores the data in two dimensions relational database management system.
Q10. What is Container in QlikView?
Answer:
A container object is used to keep multiple charts together. The container object can be used to keep many charts in the same box.
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