Annalect Analyst Interview Questions, Process, and Tips

Q1. Storage modes in BI
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Storage modes in BI refer to how data is stored and accessed in a business intelligence system.
• Storage modes include in-memory, MOLAP, ROLAP, and HOLAP.

• In-memory storage mode stores data in the system's RAM for faster access.

• MOLAP (Multidimensional OLAP) stores data in a multidimensional cube for complex analysis.

• ROLAP (Relational OLAP) directly accesses data from relational databases for real-time reporting.

• HOLAP (Hyb...read more
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Q2. Calculated columns vs Measures
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Calculated columns are static values stored in a table, while measures are dynamic calculations based on the data in the table.
• Calculated columns are pre-defined and stored in the table, while measures are calculated on the fly based on user interactions.

• Calculated columns are useful for static values like IDs or categories, while measures are used for dynamic calculations like sums or averages.

• Calculated columns can b...read more
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Power bi dashboard creation

Q1. Types of charts and uses
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Different types of charts serve different purposes in data analysis and visualization.
• Bar chart - compares categories of data

• Line chart - shows trends over time

• Pie chart - displays parts of a whole

• Scatter plot - shows relationship between two variables

• Histogram - displays distribution of data
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Q2. Power query, tools
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Q1. What is polymorphism
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Polymorphism is the ability of a single function or method to operate on different types of data.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to be used for different data types.

• Examples include method overloading and method overriding in object-oriented programming.
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Q2. Difference between foreign key and primary key
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Primary key uniquely identifies a record in a table, while foreign key establishes a link between two tables.
• Primary key ensures each record is unique in a table

• Foreign key establishes a relationship between tables

• Primary key is used to enforce entity integrity

• Foreign key is used to enforce referential integrity
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Q1. Question on self merge using both sql and python
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Q2. Project related code explanation and simulation
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Q1. Saturation curve for tv
Ans. 
A saturation curve for TV shows the relationship between the intensity of a signal and the output response.
• Saturation curve is a graph that shows how the output response of a TV changes with increasing signal intensity.

• It typically starts with a linear increase in output response, then levels off as the TV reaches its maximum capability.

• The saturation point is where the TV can no longer produce a higher output response
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Q2. Bayesian market mix modelling equation and meaning of intercept in that
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Bayesian market mix modelling equation and meaning of intercept
• Bayesian market mix modelling is a statistical technique used to analyze the impact of marketing activities on sales

• The equation includes variables such as advertising spend, promotions, and other marketing efforts

• The intercept in the equation represents the baseline level of sales that would occur without any marketing activities

• It helps in understanding t
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Q1. Question based on Google ads
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Q2. Total budget handling for campaigns
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Handling total budget for campaigns involves careful planning, monitoring, and allocation of funds.
• Create a detailed budget plan outlining expenses for each campaign

• Monitor spending regularly to ensure it stays within budget

• Allocate funds strategically based on campaign goals and target audience

• Consider factors like advertising costs, creative production, and media placement

• Adjust budget as needed based on campaign per
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Q3. Google analytics, Google data studio, bidding strategies
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