Step 1:  Go to Online exams from exam tab and click on create test series.

Step 2:  Now select course, add description for the test and add a tag.

Step 3:  Under created test series you can add multiple tests. to add test click on New test and fill the details (tes name, duration, passing percentage, no of retakes, also you can choose whether to show the result directly or not)

Step 4:  On the next step add the questions manually or by excel upload. 

Now click finish. your test is ready. To publish the test and make it available for the students click publish button.