What are some common tools or frameworks used for building batch processing pipelines?

  • Apache Beam, Apache Samza, Storm
  • Apache Kafka, RabbitMQ, Amazon Kinesis
  • Apache Spark, Apache Hadoop, Apache Flink
  • TensorFlow, PyTorch, scikit-learn
Common tools or frameworks for building batch processing pipelines include Apache Spark, Apache Hadoop, and Apache Flink. These frameworks offer distributed processing capabilities, fault tolerance, and scalability, making them suitable for handling large volumes of data in batch mode efficiently. They provide features such as parallel processing, fault recovery, and resource management to streamline batch data processing workflows.

Which of the following is an example of a data modeling tool used for designing database schemas?

  • ERWin
  • Microsoft Excel
  • Microsoft Word
  • MySQL Workbench
ERWin is an example of a data modeling tool used for designing database schemas. It allows data engineers to create visual representations of database structures, define relationships between entities, and generate SQL scripts for database creation.

The process of standardizing data units, formats, and structures across diverse data sources is known as ________.

  • Data Cleansing
  • Data Harmonization
  • Data Integration
  • Data Segmentation
Data Harmonization involves standardizing data units, formats, and structures across diverse data sources to ensure consistency and compatibility. It's crucial in creating a unified view of the organization's data.

In Dimensional Modeling, a ________ is a type of slowly changing dimension where all historical attributes are preserved.

  • Type 1 Dimension
  • Type 2 Dimension
  • Type 3 Dimension
  • Type 4 Dimension
In Dimensional Modeling, a Type 3 Dimension is a slowly changing dimension where only the most recent value is stored alongside historical values, preserving all historical attributes for analysis and reporting purposes.

Which of the following is NOT a component of a data governance framework?

  • Data modeling
  • Data quality management
  • Data security
  • Data stewardship
Data modeling is not typically considered a direct component of a data governance framework. While it plays a crucial role in database design and management, it is distinct from the governance processes focused on establishing policies, standards, and accountability for data management and usage.

Scenario: You are designing an ERD for a university database. Each student can enroll in multiple courses, and each course can have multiple students enrolled. What type of relationship would you represent between the "Student" and "Course" entities?

  • Many-to-Many
  • Many-to-One
  • One-to-Many
  • One-to-One
The relationship between "Student" and "Course" entities in this scenario is Many-to-Many, as each student can enroll in multiple courses, and each course can have multiple students enrolled, forming a many-to-many relationship.

________ is a technique used in ETL optimization to reduce the time taken to load data into the target system.

  • Aggregation
  • Data Masking
  • Denormalization
  • Incremental Load
Incremental load is a technique used in ETL optimization where only the changes or new data are loaded into the target system, reducing the time and resources required for data loading processes.

Scenario: A telecommunications company is experiencing challenges with storing and processing large volumes of streaming data from network devices. As a data engineer, how would you design a scalable and fault-tolerant storage architecture to address these challenges?

  • Amazon Redshift
  • Apache HBase + Apache Spark Streaming
  • Apache Kafka + Apache Cassandra
  • Google BigQuery
To address the challenges faced by the telecommunications company, I would design a scalable and fault-tolerant storage architecture using Apache Kafka for real-time data ingestion and Apache Cassandra for distributed storage. Apache Kafka would handle streaming data ingestion from network devices, ensuring data durability and fault tolerance with its replication mechanisms. Apache Cassandra, being a distributed NoSQL database, offers linear scalability and fault tolerance, making it suitable for storing large volumes of streaming data with high availability. This architecture provides a robust solution for storing and processing streaming data in a telecommunications environment.

When designing a logical data model, what is the main concern?

  • High-level business requirements
  • Implementation details
  • Physical storage considerations
  • Structure and relationships between data entities
The main concern when designing a logical data model is the structure and relationships between data entities, ensuring that it accurately represents the business requirements at a conceptual level.

What is the purpose of data completeness analysis in data quality assessment?

  • To identify missing data values
  • To improve data accuracy
  • To optimize data storage
  • To remove duplicate records
The purpose of data completeness analysis in data quality assessment is to identify missing data values within a dataset. It involves examining each attribute or field to determine if any essential information is absent. By identifying missing data, organizations can take corrective actions such as data collection, imputation, or adjustment to ensure that the dataset is comprehensive and suitable for analysis. Ensuring data completeness is crucial for maintaining the integrity and reliability of analytical results and business decisions.