Roll numbers for group result is a combination rather than simply roll number. Let’s say you want to see the results from roll 921711 to roll 921726. Then you have to write
921711-921726. Now you may want to add some roll numbers from outside of this range. In that case, you have to write their roll numbers separated by a comma.
The exam name option refers to the curriculum name of your diploma or polytechnic exam under the Bangladesh Technical Education Board (BTEB). By default "Diploma In Engineering" is selected. So if your exam is different from the default, make sure you select the right exam name before you hit the "View Result" button.
To sort the group list by roll number, click on the “Roll” heading. And to sort by Results, click on the “Results” heading.
To view the referred or failed subjects, click on the red text including referred. A dialog will pop up and show the subject codes, name, and the type of failure.