UiPath-ADAv1 PDF Automation Practice Question
Exhibit
{
"activity": "Read PDF Text",
"parameters": {
"FileName": "Invoice_123.pdf",
"Range": "All"
},
"result": "Empty string"
}Refer to the exhibit. The activity executes without error but returns an empty string. What is the most likely reason?
⚠ Common exam trap
Candidates often assume 'Read PDF Text' works on all PDF files. They forget that this activity cannot extract text from image-based PDFs, leading them to misinterpret the empty output as a technical error.
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
✓
The file is a scanned image.
If an activity executes without error but returns an empty string, the PDF is likely an image-based file. The Read PDF Text activity only parses text layers. If the entire content is an image, the activity finds no text layer to extract. This is a common pitfall in PDF automation where developers assume all PDFs contain searchable text. The solution is to switch to an OCR-based activity for these documents.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The file is encrypted.
Why it's wrong here
Encrypted files would throw an exception or error when the activity attempts to open them without a valid password. An empty string return value implies the file was opened successfully, but simply contained no extractable text layer for the activity to parse, pointing to an image-based PDF document.
- ✓
The file is a scanned image.
Why this is correct
Read PDF Text works on the PDF's text layer. If the document is a scanned image without an embedded text layer, the activity will return an empty string. This is the correct diagnosis for a successful execution that yields no text data, requiring the use of OCR instead.
- ✗
The file path is incorrect.
Why it's wrong here
An incorrect file path would cause a file not found exception, not an empty string return value. The execution would fail immediately during the file access phase. Since the output is provided as an empty string, we can conclude the file was located and opened by the system.
- ✗
The Range is set to 'All'.
Why it's wrong here
The Range property being set to 'All' is the correct configuration for reading the entire document. It does not cause the output to be empty unless the document itself contains no text content. The issue lies with the nature of the PDF, not the range settings used.
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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.