Which of the following are web search engines? A. DuckDuckGo B. Google C.…

Concept

A web search engine is an information-retrieval service that indexes publicly accessible web content and returns relevant webpages in response to a user query.

The classification depends on the service’s primary function: general web-index retrieval is different from searching within a social or visual-discovery platform.

Application

• DuckDuckGo provides general web search and presents results for queries across the web.

• Google Search provides general web search through its indexed web content.

• Yahoo Search provides general web search results for user queries.

• Microsoft Bing provides general web search across webpages and other indexed content.

• Pinterest is primarily a visual-discovery and bookmarking platform organized around Pins, rather than a general web search engine.

Contrast

• The set containing Google, Yahoo Search, and Bing consists of general web search services but does not include DuckDuckGo.

• The set containing DuckDuckGo, Google, Yahoo Search, and Bing consists entirely of general web search services.

• The set containing Google and Pinterest combines a general web search service with a visual-discovery and bookmarking platform.

• The set containing DuckDuckGo, Yahoo Search, Bing, and Pinterest combines general web search services with a visual-discovery and bookmarking platform.

Cross-check

DuckDuckGo, Google Search, Yahoo Search, and Bing share the defining function of retrieving general web results. Pinterest supports discovery within its own platform, but its primary service is visual discovery and bookmarking.

Result

Therefore, the web search engines listed are DuckDuckGo, Google, Yahoo Search, and Bing.