Data Modeling | MCQs

Explanation

Goal Seek, Solver, and Scenario Manager are all tools in Excel used for What-If Analysis.

It helping to analyze different possible outcomes.

Goal Seek adjusts a single input to reach a desired result.

Solver handles complex optimizations.

Scenario Manager compares multiple data scenarios.

Explanation

A primary key uniquely identifies each record (row) in a database table.

It ensures data integrity by preventing duplicate and null entries in the key column.

Explanation

A record is complete information about a database.

The database is Consist of many different files linked with each other for the retrieval of information.

Explanation

A field is the smallest meaningful unit of data in a database.

It representing a single piece of information such as a name or age within a record.

Explanation

After creating a table, fields (columns) can be modified.

It allowing for both additions and deletions as required.

Explanation

A super key is a set of one or more attributes (columns), which can uniquely identify a row in a table.

Explanation

Explanation

Explanation

A data pipeline is a series of processes that extract data from multiple sources, transform the data into a standardized format, and load it into a target system for analysis.

The primary purpose of a data pipeline in data modeling is to prepare and transform data for analysis, making it possible to:

• Extract data from various sources
• Clean and preprocess the data
• Transform the data into a format suitable for analysis
• Load the data into a data warehouse or analytics platform

Explanation

Table in database must have a primary key.