10+ Exusia Interview Questions and Answers

Using lookup for join can be inefficient and lead to performance issues. Sort component can be slow and resource-intensive.

• Lookup for join can be inefficient for large datasets as it requires scanning the entire dataset for each lookup value.

• Join is more optimized for joining datasets based on a common key, while lookup is better suited for smaller reference tables.

• Sort component can be slow and resource-intensive, especially for large datasets. It can impact performance and ...read more

Use find command to locate files with 0KB size and delete them using the rm command.

• Use find command with -size 0 option to locate files with 0KB size in a directory

• Pipe the output of find command to rm command to delete the files

• Example: find /path/to/directory -type f -size 0 -exec rm {} \;

Partition components, multifiles, checkpoints, and phases in data processing.

• Partition components refer to dividing data into smaller chunks for processing efficiency.

• Multifiles are multiple files used to store data during processing.

• Checkpoints are markers set during processing to save progress and enable restart from a specific point.

• Phases represent different stages of data processing workflow.

• Example: In a MapReduce job, partition components are created by the Map phase, ...read more

Use find command with -mtime option to delete files older than 10 days.

• Use find command with -mtime option to search for files older than 10 days.

• Combine find command with -delete option to delete the files found.

Star schema has a single centralized fact table with denormalized dimensions, while snowflake schema has normalized dimensions with multiple related tables.

• Star schema is easier to understand and query due to denormalized structure.

• Snowflake schema saves storage space by normalizing dimensions into separate tables.

• Star schema is more suitable for data warehousing and reporting purposes.

• Snowflake schema is more normalized and better for complex data models with many-to-many re...read more

OLAP is for analyzing data, OLTP is for transaction processing.

• OLAP stands for Online Analytical Processing, used for complex queries and data analysis.

• OLTP stands for Online Transaction Processing, used for routine transactions like insert, update, delete.

• OLAP systems are designed for read-heavy workloads, while OLTP systems are designed for write-heavy workloads.

• OLAP systems typically have a denormalized schema for faster query performance, while OLTP systems have a normali...read more

Abinito components are used in ETL processes for data integration and transformation.

• Abinito components are used in ETL (Extract, Transform, Load) processes for data integration and transformation.

• Some commonly used Abinito components include Input Table, Output Table, Join, Partition, Sort, Filter, and Lookup.

• Abinito provides a graphical interface for designing ETL processes using these components.

• Abinito components can be connected in a flow to define the data transformatio...read more

Data modeling is the process of creating a visual representation of data structures and relationships to help understand and analyze data.

• Data modeling helps in organizing and structuring data in a way that is easy to understand and analyze.

• It helps in identifying relationships between different data elements.

• Data modeling is important for designing databases, developing data warehouses, and improving data quality.

• Examples of data modeling tools include ER diagrams, UML diagr...read more

Data profiling is the process of analyzing and summarizing data to gain insights into its quality, structure, and content.

• Data profiling involves examining data to understand its characteristics, such as data types, patterns, and relationships.

• It helps in identifying data quality issues, such as missing values, outliers, and inconsistencies.

• Data profiling can also reveal data distribution, frequency of values, and data dependencies.

• Examples of data profiling tools include Tal...read more