# Task Overview & Pre-Exam

Before applying for certain tasks, you'll need to take a quick pre-task exam. This exam is designed to ensure you’re ready for the task and capable of meeting the requirements. Don’t worry—it’s relatively simple! The accuracy needed to pass may vary depending on the task, so be sure to review the guidelines provided.

<figure><img src="/files/fFKQXU7eQFtDq6AJUbv3" alt=""><figcaption></figcaption></figure>

Once you pass the pre-task exam, you’re all set to click the “Apply” button. At this point, the system will assign you a role based on the platform’s needs.

### There are two possible roles:

**Annotator**: Responsible for labeling data according to the task requirements.

**Reviewer:** Responsible for reviewing an annotator’s work to ensure accuracy and maintain quality.

These roles are assigned automatically by the system to optimize task distribution and maintain high-quality results. At this time, roles cannot be chosen manually. Please be sure to review the [guidelines](/user-guide-data-services-platform/data-services-page/reviewer-guidelines.md).

Finally, your rewards for completing tasks will be determined by the amount outlined in the task description. Be sure to read the task details carefully to maximize your potential!

To ensure success, take your time to thoroughly review the provided guidelines and instructions before starting the exam. Careful preparation can make all the difference!

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