Practice can make anyone perfect. Its so true when you practice something rigorously you will become master of that.
The stated above is valid incase of practising multiple choice questions. Multiple choice test questions can be an effective and efficient way to assess learning outcomes.
In SLS you can find the menu named as MCQ Practice, under that sub menu Subjectwise MCQ is available.
In Subjectwise MCQ section you will find the questions of different categories. On clicking any of the category you will find questions, just answer them and see your performance.