UiPath-ADAv1 API-Based Automation Practice Question
Exhibit
Error Log: [Error] System.Net.WebException: The remote server returned an error: (400) Bad Request. at UiPath.Web.Activities.HttpClient.Execute
Refer to the exhibit. You are performing an API call and receive a 400 Bad Request error. What is the most likely cause of this issue in the context of your UiPath automation?
⚠ Common exam trap
Candidates often assume a 400 error implies a server-side outage or network issue, failing to inspect their own request body for schema mismatches or invalid JSON syntax.
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 request body content does not match the expected API schema.
A 400 Bad Request error indicates that the server could not process the request due to client-side issues, such as malformed JSON, missing mandatory fields, or invalid data types. In UiPath, this often stems from incorrect mapping of input variables to the request body. Debugging this requires verifying the request body content against the API's contract definition to ensure the data format matches the server's expected schema exactly.
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 API server is currently down or under maintenance.
Why it's wrong here
Server downtime typically results in a 503 Service Unavailable or a 504 Gateway Timeout error. A 400 status specifically identifies the request itself as faulty, not the server's operational status. The issue lies within the request payload or formatting, rather than the server's ability to host the endpoint.
- ✓
The request body content does not match the expected API schema.
Why this is correct
A 400 error is a client-side error meaning the server cannot parse the request. This usually happens when required JSON fields are missing, data types are mismatched, or the structure is malformed. Checking the request body against the API documentation is the definitive way to resolve this specific error type.
- ✗
The authentication token has expired or is invalid.
Why it's wrong here
Expired or invalid tokens result in a 401 Unauthorized or 403 Forbidden error. These codes signify that the server identifies the request source but rejects it based on permission settings. A 400 error focuses on the content of the request rather than the identity of the requester or their permissions.
- ✗
The requested resource path does not exist on the server.
Why it's wrong here
A non-existent resource path or endpoint typically returns a 404 Not Found error. 404 indicates that the URL is incorrect, whereas 400 indicates that the URL might be correct, but the information sent to that URL is somehow invalid or cannot be processed by the server-side logic.
About these practice questions
This UiPath-ADAv1 question is part of Courseiva's 285-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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.