How many times can the student launch the ROPOT session and can he/she see the correct solution?

This also depends on your choice. Access to the correct solution is set in the "Display the correct answers to students after they have finished working with the ROPOT application" section:

display answers to correctly answered questions only: if you tick this option, the correct answers for incorrectly answered questions will not be displayed. The student will only see that he/she answered the question incorrectly. If he/she is allowed another session, he/she can try to answer the question better.
immediately after the submission of answer form:once the student has submitted the test, he/she will be able to see the correct solution and the points obtained by clicking on the "View" button.
display automatically right after the users have finished working with the ROPOT application: immediately after submitting the test, the student will be automatically redirected to the page with the correct solution.
after the period during which the ROPOT application can be worked with: the student will see the correct solution after the period during which the ROPOT can be worked with (see below). Until then, the student will not see the scores for each question. If you still want to tell him/her the overall result, use the transfer of the scores to the notebooks (see above).
never: the student will not see the correct solution, a typical setting for real testing. It can be enabled to show scores in the session list.
display all the answers after x attempts (unless all the questions are answered correctly earlier): the aim is to make students think more about their possible mistakes in the practice test by preventing them from viewing the correct results immediately after the first attempt. Instead, they have the opportunity to take the test several times, knowing that they did not get everything right. If an option is set that allows multiple different sessions to be generated at the same time, attempts are counted separately for each session generated.
TipThis number of attempts limits only the access to the answers; the student may do the actual answering in more attempts than is the number entered here.
only from – to (this option is not recommended): the student can only open the correct solution view at the set interval. (If you select the option and do not fill in the values, the student will always view the solution.)

PozorThe time limit for displaying the correct answers does not guarantee that students will not take pictures, email them, etc. Therefore, do not use this option if you have a serious interest in keeping the correct results secret.

You can set the possibility to work with the ROPOT repeatedly in the section "Should students be allowed to access this ROPOT application repeatedly?":

maximum number of times the test can be evaluated (if no number is provided, no limit is applied): the number of test evaluations does not include saves (using “save and continue” button), because these do not result in an evaluation of the test. The test is scored only after it is submitted.
If you need to count the number of times the ROPOT is launched instead of the number of times it is evaluated, tick the option "count the number of times the ROPOT application (test) gets opened (not evaluated)“.
Yes, they should and some other questions should be offered to them next time they work with the ROPOT application: the term "session" means that the student launches a blank, new test. You can set this parameter even if you use all the questions in the question set. In that case, the student will have a clean test in front of him/her again and will have to fill in everything again. If you use only a certain number of questions, the student will work with variations of the test (the selection of questions is random!). For this option, you can disable the ability to answer sessions already launched.
Yes, they should, but it is always the same form (same questions) that should be offered to them: this means that a student can only take the new test once. After that, he/she can only correct his/her answers, he/she will never have a blank test in front of him/her again.
no (once you open the ROPOT, you cannot reopen the ROPOT sometime later and change the answers): this is a typical option for testing. Re-opening is not possible even before final submission.
No, never (select this option provided the test is to be scanned and you only want to make it available for browsing): this option will not allow the student to lauch the test. It is only used for scanable tests where the tests are written on paper. You can make the view of the tests available in the "Display the correct answers to students after they have finished working with the ROPOT application" section.