Search engines and gateways – UGC NET Question

Statements A, B and D correctly explain the roles of search engines and subject gateways, while statement C is false. Search engines use automated crawlers and do not always judge academic quality, whereas subject gateways are curated by experts for specific disciplines. Using such gateways can improve the reliability of sources consulted by researchers. Therefore the combination A, B and D only is correct.

Option A:
Option A is incomplete because it includes only A and B and omits D. While A and B explain indexing and curation, they do not highlight the benefit of subject gateways for reliability, which D adds. Excluding D makes the answer less informative.

Option B:
Option B is correct because it combines statements that accurately differentiate broad, automated search engines from curated gateways and recognises their academic value. It excludes C, which wrongly assumes that all indexed pages are academically evaluated.

Option C:
Option C is incorrect because it lists only B and D and omits A. A provides the basic description of how general search engines work, so leaving it out gives an incomplete picture of web search.

Option D:
Option D is incorrect because it treats all four statements as correct and thereby accepts C. Since C misrepresents the indexing process, this combination cannot be considered correct.