Source Based Questions, They are: Inference (What does Source A tells you?) Inference with Purpose (Why did the cartoonist draw the cartoon) Comparison (How does Source A and Source B differ?) Usefulness (How useful is Source A in telling you about the *issue*). Before answering the SBQ, ALWAYS identify the ISSUE QUESTION given in SECTION A. Learn to identify the questions and recognise the relevant techniques to apply. This presentation will guide you through the steps needed to answer the Reliability question type in the SBQ section of your exam. 1) Inference questions; 2) Compare and Contrast questions; 3) Usefulness. Source Based Question (SBQ) Formats, Social Studies - Free download as PDF File (.