IBM Certification Big Data Architect 5

Question 1

Which IBM data architecture pattern uses a 'data vault' modeling approach to improve auditability and adaptability in enterprise data warehouses?

Accepted Answer

Data Vault 2.0 with hubs, links, and satellites

Answer

Data Vault 2.0 organizes data into hubs (business keys), links (relationships), and satellites (context/attributes), enabling auditability and schema flexibility.

Question 2

An architect designs an IBM data pipeline where Apache Spark jobs process HDFS data. What is the performance advantage of using Spark's in-memory processing over MapReduce?

Accepted Answer

Spark keeps intermediate data in memory across stages, reducing disk I/O significantly

Answer

Spark caches intermediate results in memory across transformation stages, dramatically reducing the disk I/O that MapReduce incurs between each map and reduce step.

Question 3

In IBM Cloud Object Storage, what erasure coding configuration provides the best balance between storage efficiency and fault tolerance?

Accepted Answer

10+4 erasure coding (10 data slices, 4 parity slices)

Answer

10+4 erasure coding stores data across 14 slices with 4 parity slices, tolerating 4 simultaneous failures while using less storage than 3x replication.

Question 4

When integrating IBM MQ with a big data pipeline, what problem does persistent message delivery primarily solve?

Accepted Answer

Guaranteeing message delivery even if downstream consumers are temporarily unavailable

Answer

IBM MQ's persistent delivery ensures messages survive broker restarts and consumer outages, providing at-least-once delivery guarantees for critical data pipelines.

Question 5

A Big Data Architect must enforce column-level security on an IBM Db2 Warehouse table containing PII. Which mechanism is most appropriate?

Accepted Answer

Row permissions using IBM row and column access control (RCAC)

Answer

IBM Db2 Row and Column Access Control (RCAC) allows fine-grained policies that restrict which rows and columns specific users or roles can access.

IBM Certification Practice Test

IBM Certification Practice Test

IBM Certification Big Data Architect 5