IT-ELEC-4-DATAWAREHOUSING EXAM PM-M

What does the acronym OLAP represent in data analytics?

• Online Advanced Processing
• Online Logical Application Processing
• Offline Analytical Processing
• Online Analytical Processing

Answer explanation

OLAP stands for Online Analytical Processing, used for multidimensional analytical queries.

What is the main purpose served by OLAP systems?

• Multidimensional data analysis
• Image processing
• Data storage
• Transaction processing

Answer explanation

OLAP is mainly used for multidimensional analysis of business data.

Which of the following does not fall under common OLAP operations?

• Slice
• Drill-down
• Pivot
• Indexing

Answer explanation

Indexing is more related to database optimization, not OLAP operations.

OLAP tools are generally associated with which type of information system?

• Data warehouses
• CRM systems
• Cloud storage
• Operating systems

Answer explanation

OLAP is often implemented on top of data warehouses for analytical processing.

Which OLAP model utilizes pre-aggregated data cubes to enable quicker queries?

• OLTP
• HOLAP
• ROLAP
• MOLAP

Answer explanation

MOLAP uses pre-aggregated cubes for fast access and high performance.

What is one of the most significant benefits of MOLAP?

• Works directly with relational databases
• Uses less storage
• Faster query performance
• No need for multidimensional analysis

Answer explanation

MOLAP offers faster query performance due to its pre-aggregated cube structure.

Which OLAP architecture accesses relational databases directly without precomputed cubes?

• MOLAP
• HOLAP
• ROLAP
• SQL

Answer explanation

ROLAP operates directly on relational databases without using precomputed cubes.

What is a known limitation of MOLAP systems?

• Inability to handle large datasets
• High storage requirements
• No multidimensional support
• Slower query response

Answer explanation

MOLAP requires more storage space due to its dense multidimensional cubes.

Which OLAP model integrates the features of both MOLAP and ROLAP?

• HOLAP
• ROLAP
• OLTP
• MOLAP

Answer explanation

HOLAP is a hybrid model combining MOLAP and ROLAP features.

In the context of fraud detection and assessing loan risks, which OLAP type is ideal for banks?

• ROLAP
• OLTP
• HOLAP
• MOLAP

Answer explanation

ROLAP supports detailed and scalable analysis required for financial data assessments.