10+ Hindustan Unilever Interview Questions and Answers

The probability of extinction of an amoeba with equal chances of death, idling, splitting into 2, and splitting into 3.

• Calculate the probability of each event happening in a minute

• Calculate the probability of the amoeba surviving in a minute

• Calculate the probability of the amoeba surviving after n minutes

• Use probability theory to determine the overall probability of extinction

Calculating values using DAX in Power BI

• Use SUMX function to calculate sum of values in a column

• Use CALCULATE function to apply filters and conditions to calculations

• Use DAX measures to create reusable calculations

• Example: Calculate total sales for a specific product category

Handling large datasets involves optimizing storage, processing, and analysis techniques.

• Use distributed computing frameworks like Hadoop or Spark to process data in parallel.

• Utilize data compression techniques to reduce storage requirements.

• Implement indexing and partitioning strategies to improve query performance.

• Consider using cloud-based storage and computing resources for scalability.

• Use sampling techniques to work with subsets of data for initial analysis.

Parameters are variables that can be passed into a function or procedure to customize its behavior.

• Parameters are defined when creating a function or procedure.

• They can be used to pass values into the function or procedure.

• Parameters can be required or optional, with default values specified.

• They help make functions more flexible and reusable.

• Example: def calculate_area(length, width):

Creating data model and visualizations involves structuring data and presenting it visually.

• Identify the key variables and relationships in the data

• Design a data model that represents the data structure

• Select appropriate visualization tools and techniques

• Create visualizations such as charts, graphs, and dashboards

• Ensure the visualizations effectively communicate insights from the data

Power BI optimization techniques involve data model optimization, query optimization, and report design best practices.

• Optimize data model by removing unnecessary columns and relationships

• Use query folding to push data transformation tasks to the data source

• Avoid using calculated columns and instead use measures for calculations

• Limit the use of visuals that require high computational resources

• Use aggregations and composite models for large datasets

The longest palindrome in a given string is the longest sequence of characters that reads the same forwards and backwards.

• Iterate through each character in the string

• For each character, expand outwards to find the longest palindrome centered at that character

• Keep track of the longest palindrome found so far

• Return the longest palindrome

Print a pattern as shown below.

• Use nested loops to iterate through rows and columns.

• Use conditional statements to determine the pattern to be printed.

• Store each row as a string in an array of strings.

Probability of a point making an obtuse angle inside a trapezium with one side.

• The point must lie inside the trapezium.

• The trapezium must have one side that is not parallel to the other.

• Use trigonometry to calculate the angles of the trapezium.

• Calculate the probability of the point making an obtuse angle using the angles of the trapezium.