Qlik Developer Interview Questions and Answers

Qlik optimization techniques enhance performance and efficiency in data loading and visualization.

• Use data reduction techniques to limit the amount of data loaded, e.g., filtering out unnecessary records.

• Optimize data model by avoiding synthetic keys and circular references, ensuring a star schema design.

• Utilize incremental loading to update data without reloading the entire dataset, improving load times.

• Leverage Qlik's associative model to create efficient data relationships...read more

SQL is a standard language for managing and manipulating relational databases, essential for Qlik developers.

• SQL stands for Structured Query Language, used for querying and managing databases.

• Common SQL commands include SELECT, INSERT, UPDATE, DELETE.

• Example: SELECT * FROM Employees WHERE Department = 'Sales'; retrieves all employees in Sales.

• Joins are crucial for combining data from multiple tables, e.g., INNER JOIN, LEFT JOIN.

• Aggregate functions like COUNT(), SUM(), AVG() h...read more

Qlik data modeling methods involve structuring data for optimal analysis and visualization in Qlik applications.

• Star Schema: Central fact table connected to dimension tables. Example: Sales data with dimensions like Product and Customer.

• Snowflake Schema: Extension of star schema with normalized dimensions. Example: Product dimension split into Category and Subcategory.

• Data Concatenation: Combining similar tables to simplify data model. Example: Merging sales data from differe...read more