Hi sir/ if I sign a contract with out knowing the...

If your inquiry is related to the termination of the employment contract during the probationary period, here is the following information:
The worker has the right to terminate the work contract during the probationary period, with the necessity for the worker to notify the employer at least one month before the termination.
The new employer must also pay accommodation costs to the previous employer.
If you pay these costs to your employer, we recommend obtaining a written statement from your old employer
In order to avoid exposure to any incorrect claims and re-ask those costs.
If the employer violates this, the worker can file a complaint with the Ministry of Human Resources and Emiratisation
Here is the text of the new UAE labor law, related to your inquiry:
Article 9
The employer may appoint the worker under a probationary period not exceeding (6) six months from the date of commencing work;
The employer may terminate the worker’s service during this period after notifying the worker of that in writing before (14) fourteen
at least one day from the date specified for service termination.
A worker may not be appointed under probation more than once with one employer, and if the worker has passed a period of
The experiment is successful and continues to work. The contract becomes valid according to the terms agreed upon in it, and those must be calculated
period within the period of service.
In the event that the worker wishes to move, during the probationary period, to work for another employer in the country, he must:
Notify the original employer of this in writing, within a period of no less than one month from the date of his desire to terminate the contract, and the owner of
The new work shall compensate the original employer for the costs of recruiting or contracting with the worker, unless this is done
Agree otherwise.
In the event that the foreign worker wishes to terminate the employment contract, during the probationary period, to leave the country, he must notify the employer.
To do so in writing, at least (14) fourteen days prior to the date specified for the termination of the contract, if he wishes
In returning to the country and obtaining a new work permit within (3) three months from the date of departure, the owner of the
The new work shall be compensated as stipulated in Clause (3) of this Article, unless there is an agreement between
The worker and the original employer otherwise.

If you will break the employment contract during the probationary period and leave the UAE, there is no obligation on you to pay compensation to the employer.
But if you are going to move to another job in the UAE, you must pay the fees paid by the employer