How does a data catalog contribute to effective data governance?
- It focuses on data encryption to ensure security.
- It is used for primary data storage.
- It primarily deals with data visualization techniques.
- It provides a centralized repository for storing and managing metadata.
A data catalog contributes to effective data governance by serving as a centralized repository for storing and managing metadata. Metadata includes information about the data, such as its origin, structure, and usage, which is crucial for ensuring data quality and compliance with governance policies.
What is Hadoop primarily used for in Big Data technologies?
- Data Storage and Processing
- Data Visualization
- Machine Learning
- Real-time Analytics
Hadoop is primarily used for distributed storage and processing of large volumes of data. It enables the distributed processing of data across clusters, making it suitable for tasks like batch processing and analytics.
What is the difference between 'forking' and 'cloning' a repository in Git?
- Forking creates a copy on the server, while cloning creates a copy on the local machine
- Forking is a Git command, while cloning is a GitHub action
- Forking is only possible for public repositories, while cloning is for private repositories
- Forking is used for individual development, while cloning is for collaborative projects
Forking creates a copy of a repository on the server under the user's account, while cloning creates a copy on the local machine. Forking is often used for contributing to open-source projects, while cloning is a general process of copying a repository.
When introducing a new data analytics tool in the organization, what data governance practice is crucial to maintain data quality and consistency?
- Data Cataloging
- Data Lineage
- Data Profiling
- Data Stewardship
Establishing data lineage is crucial for maintaining data quality and consistency when introducing a new analytics tool. It provides a clear understanding of the data's origin, transformations, and movement, aiding in ensuring data accuracy throughout its lifecycle.
In advanced data analytics, _______ is crucial for making predictions based on historical data.
- Data Mining
- Descriptive Analytics
- Machine Learning
- Predictive Modeling
Predictive modeling is crucial in advanced data analytics for making predictions based on historical data. It involves using statistical algorithms and machine learning techniques to forecast future trends and outcomes.
_______ charts are effective for displaying part-to-whole relationships and comparing different categories over time.
- Bar
- Line
- Pie
- Scatter
Pie charts are effective for displaying part-to-whole relationships, where each slice represents a proportion of the whole. They are useful for comparing different categories but may not be suitable for precise comparisons.
A _______ relationship in a database represents a connection between two or more tables.
- Composite Key
- Foreign Key
- Primary Key
- Unique Key
A "Foreign Key" relationship in a database represents a connection between two or more tables. This key establishes a link between tables by referencing the primary key of another table, creating a relationship between them.
In data preprocessing, what does 'normalization' refer to?
- Data imputation
- Handling categorical data
- Removing outliers
- Scaling numerical features to a standard range
Normalization in data preprocessing refers to scaling numerical features to a standard range, often between 0 and 1. This ensures that different features with different scales contribute equally to the analysis, preventing one feature from dominating the others.
What is the primary difference between SOAP and REST APIs in terms of their communication protocols?
- REST requires a pre-defined contract, while SOAP does not.
- SOAP is only used in web applications, while REST is used in mobile applications.
- SOAP is stateless, while REST is stateful.
- SOAP uses XML for message formatting, while REST typically uses JSON.
The primary difference is in their message formatting; SOAP uses XML, while REST typically uses JSON. Additionally, REST is stateless, meaning each request from a client contains all the information needed, while SOAP can be stateful or stateless.
In a linked list, the _______ operation involves adjusting the pointers of the previous and next nodes when inserting or deleting a node.
- Deletion
- Insertion
- Search
- Traversal
In a linked list, the Deletion operation involves adjusting the pointers of the previous and next nodes when removing a node. This ensures that the integrity of the linked list structure is maintained.