CDMP Data Quality Specialist: 320 Practice Questions

This course contains the use of artificial intelligence.

A high quality score does not always mean that data is ready for a particular decision. A well-formed identifier can belong to the wrong customer. A file can arrive on time while its contents are out of date. A correction can fix today's records while leaving the generating process unchanged.

This independent practice course helps you work through those distinctions while preparing for the Data Quality Specialist examination. The focus is on choosing a defensible answer from the stated evidence, requirements and business consequences, rather than selecting the most technical-sounding action.

Your practice route

• Four focused sets of 30 questions build foundations, interpretation and boundary-case skills. Each uses an author-selected 35-minute practice duration.
• Two full-length mock exams of 100 questions use the standard 90-minute examination length. Their topic distributions are author-selected; undisclosed official subdomain weights are not claimed.
• 320 original questions in total, with an explanation of the answer, feedback for every option and a specific study tip.

What you will work through

Practice distinguishes accuracy, validity, completeness, consistency, integrity, uniqueness, timeliness, currency and reasonableness. You will interpret profiling evidence, define applicable measurement populations, assess missing-value states, investigate causes and evaluate controlled corrections.

The scenarios also connect quality with business accountability, metadata, modeling, master data, integration, operational service levels and improvement economics. Selected SQL examples use explicitly stated SQLite behavior to make the business-rule logic concrete; this is not a database administration certification course.

How to use the explanations

Start with the focused sets and record the condition that determines each answer. After a mistake, explain why every alternative fails under that condition. Revisit the related material in your own current DMBOK reference, then use the two timed mocks to practice switching between decision types.

Examination context

The current reference basis is DAMA-DMBOK2 Revised Edition. The official Data Quality Specialist examination has 100 multiple-choice questions and a standard duration of 90 minutes. The English as a Second Language version provides 110 minutes and remains an English examination. The course is taught in English.

The same Specialist examination supports the Practitioner and Master certification paths at different required pass percentages, alongside other certification requirements. The course uses 70% as its practice target; candidates aiming at Master can also evaluate an 80% goal. A course practice score does not award certification or predict an official result.

These are independently authored learning questions, not official examination questions or recalled items. This course does not imply DAMA endorsement and does not promise a pass. Use it as supplementary practice alongside your own current reference and study plan.