Q.List any four sources of secondary data, and state the four points an investigator should check before using secondary data collected by someone else.

Common sources include government publications, journals, and earlier surveys; before reuse, secondary data must be checked on four specific points.

Step 1 — List four sources of secondary data. As covered in this chapter: (a) official/government publications, such as Census of India reports or RBI bulletins; (b) journals, newspapers, and periodicals; (c) publications of research institutions or trade associations; (d) reports of international bodies, or unpublished internal business records.

Step 2 — State the four checks before using secondary data. Before relying on any of these sources, the investigator should check: suitability (does it fit the current study's objective, area, and time period?), adequacy (does it cover the topic in enough scope and detail?), reliability (was it collected by a competent, unbiased, reputable source?), and comparability (does it use the same definitions, units, and classification as the present study, so it can be meaningfully compared?). …

Listing only sources without stating the four checks (or vice versa) loses half the marks on this kind of two-part question — al …