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Data Warehousing & OLAP Quiz

Authored by Art Magpantay

Computers

University

Used 1+ times

Data Warehousing & OLAP Quiz
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25 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a data warehouse?

A centralized repository for analysis and reporting

A system for transaction processing

A type of operational database

A tool for real-time data processing

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does OLAP stand for?

Operational Layer Access Protocol

Online Analytical Processing

Online Local Access Protocol

Organizational Layered Analytical Processing

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a characteristic of data warehouses?

Unstructured data storage

Real-time data processing

Subject-oriented organization

Volatile data storage

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of ETL?

To store data in operational databases

To analyze data in real-time

To visualize data for reporting

To extract, transform, and load data into a warehouse

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which schema design reduces redundancy?

Snowflake Schema

Star Schema

Hybrid Schema

Flat Schema

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the roll-up operation do in OLAP?

Filters data by multiple dimensions

Rearranges dimensions for analysis

Accesses detailed data

Summarizes data to a higher granularity

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a disadvantage of the Snowflake Schema?

Increases data redundancy

Simplifies query performance

Decreases query complexity

Requires more storage due to normalization

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