Qliksense Developer Interview Questions and Answers

applymap is used to map a value from one table to another while join is used to combine two or more tables based on a common field.

• applymap is used for one-to-one mapping while join is used for many-to-one mapping

• applymap is faster than join for small datasets

• join can handle more complex data relationships than applymap

• applymap can be used to replace null values with a default value

• join can be used to aggregate data from multiple tables

Binary load loads data from one Qlik Sense app to another, while incremental load only loads new or changed data.

• Binary load is useful for combining data from multiple apps into one.

• Incremental load can improve performance by only loading new or changed data.

• Both can be used together for efficient data management.

QlikSense scripts are essential for data loading and transformation in Qlik applications.

• Use 'LOAD' statement to load data from various sources, e.g., 'LOAD * FROM [data.csv];'

• Utilize 'JOIN' to combine tables, e.g., 'LEFT JOIN (Table1) LOAD * RESIDENT Table2;'

• Implement 'WHERE' clause to filter data, e.g., 'LOAD * WHERE Sales > 1000;'

• Use 'GROUP BY' for aggregating data, e.g., 'LOAD Product, SUM(Sales) AS TotalSales GROUP BY Product;'

• Create variables for dynamic calculations, e...read more

Qliksense is the next-generation data visualization tool by Qlik, offering a more modern and user-friendly interface compared to QlikView.

• Qliksense has a more modern and user-friendly interface compared to QlikView.

• Qliksense allows for more self-service data visualization and exploration.

• Qliksense is built on a responsive design, making it easier to use on different devices.

• QlikView is more focused on guided analytics and dashboard creation.

• QlikView has a more rigid developme...read more

Peek is used to look at the value of a field in the previous record, while Prev is used to look at the value of a field in the previous row.

• Peek function is used to fetch the value of a field in the previous record.

• Prev function is used to fetch the value of a field in the previous row.

• Peek can be used to compare values between different records.

• Prev is useful for calculating running totals or differences between consecutive rows.

Applymap is a function in Qlik Sense used to map values from one field to another based on a mapping table.

• Applymap function is used to look up values in a mapping table and apply them to a field in the data model.

• It helps in replacing values in a field with corresponding values from a mapping table.

• Syntax: Applymap('mapName', fieldToMap, defaultValue)

SQL joins combine data from multiple tables based on related columns, enhancing data analysis capabilities.

• INNER JOIN: Returns records with matching values in both tables. Example: SELECT * FROM Orders INNER JOIN Customers ON Orders.CustomerID = Customers.CustomerID;

• LEFT JOIN: Returns all records from the left table and matched records from the right table. Example: SELECT * FROM Customers LEFT JOIN Orders ON Customers.CustomerID = Orders.CustomerID;

• RIGHT JOIN: Returns all re...read more