DP-203 Develop data processing Practice Question
You are tasked with transforming data in an Azure Synapse Analytics pipeline using a mapping data flow. The source data contains a column 'FullName' in the format 'LastName, FirstName'. You need to split this into two separate columns: 'LastName' and 'FirstName'. Which transformation should you use?
⚠ Common exam trap
It's easy for candidates to confuse the Derived Column transformation with the Split transformation (which does not exist in mapping data flows) or mistakenly think the Pivot transformation can re-arrange column data, when in fact Derived Column is the correct choice for column-level string operations.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Derived Column transformation
The Derived Column transformation is correct because it allows you to create new columns by applying expressions to existing data. In this case, you can use string functions like `split()` or `substring()` and `locate()` to parse 'FullName' into 'LastName' and 'FirstName' based on the comma delimiter. This transformation operates row-by-row, making it ideal for simple column splits.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Pivot transformation
Why it's wrong here
Pivot rotates data, not splits columns.
- ✗
Aggregate transformation
Why it's wrong here
Aggregate is for grouping and aggregations.
- ✗
Lookup transformation
Why it's wrong here
Lookup joins data from another source.
- ✓
Derived Column transformation
Why this is correct
Derived column can use expressions to split strings.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DP-203 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DP-203 exam.