In a case study where a company is facing declining sales, what analysis technique would be most effective in identifying the root causes?
- Cohort Analysis
- Regression Analysis
- SWOT Analysis
- Trend Analysis
Regression Analysis would be most effective in identifying the root causes of declining sales. It allows for the exploration of relationships between variables and can help uncover factors contributing to the decline. SWOT Analysis, Trend Analysis, and Cohort Analysis focus on different aspects and may not provide the same depth of insight.
To ensure clarity in communication, a data analyst should avoid using too much _______.
- Ambiguity
- Complexity
- Jargon
- Redundancy
A data analyst should avoid using too much complexity in their communication to ensure clarity. This includes avoiding unnecessary technical jargon, which may hinder understanding for non-technical stakeholders.
How do you select distinct values from a column in a SQL table?
- DIFFERENT
- DISTINCT
- SELECT UNIQUE
- UNIQUE
The DISTINCT keyword in SQL is used to retrieve unique values from a specified column in a table. It ensures that only distinct values are returned in the result set, eliminating duplicate entries. This is helpful when you want to see a list of unique values in a specific column.
The process of _________ involves identifying, understanding, and documenting how data moves across an organization.
- Data Analysis
- Data Extraction
- Data Mapping
- Data Validation
The process of Data Mapping involves identifying, understanding, and documenting how data moves across an organization. It helps in understanding data flows and relationships between different systems.
Which SQL clause is used to filter records based on more than one condition?
- AND
- FILTER
- OR
- WHERE
The OR operator in SQL is used to filter records based on more than one condition. It allows you to retrieve records that satisfy either of the specified conditions, providing flexibility in querying the database. The WHERE clause is used for a single condition, and AND combines conditions, but OR broadens the filter.
In project management, which KPI is crucial for evaluating the efficiency of resource utilization?
- Earned Value (EV)
- Resource Utilization Rate
- Return on Investment (ROI)
- Schedule Variance (SV)
Resource Utilization Rate is crucial for evaluating the efficiency of resource utilization in project management. It measures the percentage of time that resources are actively contributing to project work. ROI, EV, and SV are important KPIs but focus on different aspects of project performance.
When executing a, b = 10, 20; print(____) to swap and print a and b, the output is 20, 10.
- a
- a, b
- b
- b, a
The correct syntax to swap the values of variables a and b is b, a = a, b. This statement exchanges the values of a and b, resulting in the output 20, 10.
_________ in Tableau provides a powerful way to create complex calculations and data transformations.
- Aggregation
- Calculated Field
- Dashboard
- Data Blending
The Calculated Field feature in Tableau allows users to create custom calculations based on existing fields. It is powerful for creating complex calculations and transforming data within Tableau.
In the context of cloud computing, what advanced technology is often integrated with big data platforms for predictive analytics?
- Blockchain
- Internet of Things (IoT)
- Machine Learning
- Virtualization
Machine Learning is often integrated with big data platforms in the cloud for predictive analytics. It enables the systems to learn patterns from large datasets and make predictions, enhancing data analysis capabilities.
The process of _______ in data-driven decision making involves understanding the hidden patterns and relationships in large datasets.
- Data Cleaning
- Data Exploration
- Data Integration
- Data Pattern Recognition
The process of data pattern recognition in data-driven decision making involves uncovering hidden patterns and relationships in large datasets. This step is essential for gaining insights and making informed decisions based on the data.