IBM Assessment: High Volume Data Migration v4 Practice Exam 2025: Latest Questions

During migration assessment, a team must estimate the required cutover window and network bandwidth for moving 120 TB of data. Which input is MOST critical to validate first to avoid unrealistic plans?

A project must migrate data from a production system with minimal downtime. The team plans an initial bulk load followed by continuous capture of ongoing changes until cutover. Which approach BEST fits this requirement?

A data migration includes customer records where the target requires standardized postal codes and removal of leading/trailing whitespace. When should these corrections be applied to reduce downstream defects?

After starting a high-volume bulk load, throughput is far below expectations. The load jobs are waiting frequently, and the disk subsystem shows high write latency. What is the MOST likely bottleneck?

A migration plan must prioritize risks for a 24x7 system moving to a new platform. Which risk is MOST important to explicitly address in the cutover plan to protect business operations?

A team is using a migration tool to perform a parallel load with 16 worker threads. They notice frequent deadlocks on the target during insert operations. Which adjustment is MOST likely to reduce deadlocks without sacrificing the parallel load approach?

A migration includes multiple source systems with inconsistent customer identifiers. The target requires a single master customer key with survivorship rules (e.g., most recent address wins). Which approach BEST addresses this requirement?

A CDC-based migration is configured, but the target is falling behind during peak hours. The change backlog grows steadily even though network usage is low. Which is the BEST next troubleshooting step?

A migration requires near-zero downtime for a system with strict referential integrity. The team plans to load child tables in parallel while CDC is applying ongoing changes. After cutover testing, they find orphaned child rows intermittently. What is the MOST likely root cause?

A bank must migrate tens of billions of rows while masking sensitive fields (e.g., PAN) and preserving referential integrity across multiple tables that share the same sensitive key values. Which design BEST satisfies both masking and integrity at scale?

During migration planning, a team must choose a method to validate that every row migrated from an on-premises database to the target is complete and unaltered, without running expensive full row-by-row comparisons in production. Which approach is the best practice?

A migration design requires moving data continuously with minimal downtime and the ability to resynchronize after a network interruption. Which capability is most critical in the selected migration tool/approach?

A team discovers that a significant number of incoming customer records contain leading/trailing spaces and inconsistent casing in key matching fields (e.g., email, last name), causing duplicate creation in the target system. What should be done first to improve data quality outcomes?

A project is migrating 80 TB across many schemas. The target requires referential integrity, but loading child tables before parents will fail due to foreign key constraints. What is the most effective strategy?

A team uses parallel jobs to load partitions into the target database. Performance is worse than expected, and monitoring shows high lock contention on indexes during load. What change is most likely to improve load performance?

In a heterogeneous migration, the source uses a different character set than the target. After migration, some text fields display replacement characters and question marks. Which corrective action is the most appropriate?

A migration is failing intermittently with "out of memory" errors in the transformation layer when processing very large tables. Which redesign is most likely to resolve the issue while maintaining throughput?

A data pipeline applies a business rule: when two source fields conflict, the target field should take the value from the most recently updated source record. During validation, auditors require traceability showing which source record populated each target record. Which design best meets this requirement?

A near-zero-downtime migration uses CDC. After cutover, the team finds that some transactions committed on the source shortly before cutover are missing on the target, even though the CDC tool reports no errors. Which action is the most reliable to prevent this class of issue?

A large migration to a cloud target shows unpredictable throughput. Some hours the load is fast; other hours it slows dramatically without changes to the jobs. Metrics show the database is frequently waiting on storage I/O and log flushes. Which solution is most appropriate to stabilize and improve performance?

A migration team must move 40 TB of historical data from an on-premises database to a target system. The business requires the ability to prove that all records arrived without alteration, but they do not need field-by-field transformation. Which approach best satisfies this requirement?

During planning for a high-volume migration, the source and target schemas are mostly compatible, but the target enforces stricter NOT NULL and referential integrity constraints. What is the recommended sequencing to reduce load failures while preserving data quality?

A team is using a parallelized bulk-load pipeline into the target database. After increasing parallel threads, throughput initially improves but then drops sharply, and the database shows heavy log write waits and frequent checkpoint activity. What is the most likely bottleneck and best next action?

A project requires capturing ongoing changes from the source system while a large initial load is running, with minimal downtime at cutover. Which capability is primarily needed to support this approach?

A migration to the target platform fails intermittently with duplicate key errors. Investigation shows that two parallel load processes sometimes load overlapping data ranges due to inconsistent partition boundary definitions. What is the best corrective design?