UiPath-ADAv1 Files, Folders, and Data Manipulation Practice Question
An automation must append new transaction rows to an existing CSV file at the end of each run without deleting the data already present. The developer is configuring the Write CSV activity. Which property must be set to achieve append behavior?
⚠ Common exam trap
Many exam-takers confuse formatting properties such as IncludeColumnNames with the property that actually controls overwrite versus append behavior.
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
✓
Set the Append property to True.
Write CSV overwrites the target file by default, so preserving existing rows requires explicitly enabling the Append property. IncludeColumnNames, Delimiter, and Encoding affect formatting and character representation, not whether prior content survives. Only Append changes the write mode to add rows at the end of the file.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Set the IncludeColumnNames property to False.
Why it's wrong here
IncludeColumnNames controls whether the header row is written. It does not affect whether existing data is preserved or overwritten. Setting it to False would simply omit headers, but the file would still be overwritten by default. It is unrelated to the append requirement in this scenario.
- ✗
Set the Delimiter property to a newline character.
Why it's wrong here
The Delimiter property defines the character separating fields, such as comma or semicolon. Changing it to a newline would corrupt the CSV structure by making every field a separate line. It has no bearing on whether the activity appends to or overwrites the existing file, so it cannot satisfy the requirement.
- ✗
Set the Encoding property to UTF-8.
Why it's wrong here
Encoding determines how characters are represented in the file, which matters for special characters but not for append versus overwrite behavior. Choosing UTF-8 does not prevent the existing file from being replaced. The developer still needs to enable the Append property to preserve prior transaction rows.
- ✓
Set the Append property to True.
Why this is correct
The Write CSV activity exposes an Append property. When set to True, new rows are added to the end of the existing file instead of overwriting it. This directly satisfies the requirement to preserve previously written transaction rows while adding the current run's data. Leaving it at the default False would truncate and replace the file content.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official UiPath exam blueprint
This UiPath-ADAv1 practice question is part of Courseiva's free UiPath 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 UiPath-ADAv1 exam.