Which of the following is an instant messaging application? (a) WhatsApp (b) Google Talk (c) Viber Select the correct answer from the codes given below:
(a), (b) and (c)
An instant messaging application allows two or more users to exchange text messages in real time over a network, usually showing when the other party is online and when a message has been delivered.
WhatsApp is an instant messaging application. Launched in 2009 and running over the internet rather than the mobile network's SMS channel, it supports text, images, voice notes, calls and group chats.
Google Talk is also an instant messaging application. Introduced by Google in 2005 and integrated with Gmail, it offered text chat and voice calling and was later replaced by Hangouts and subsequent services. That a product has since been discontinued does not change what kind of application it was.
Viber is likewise an instant messaging application. Released in 2010, it provides messaging along with voice and video calls over the internet.
Since all three fit the definition, the code covering all of them applies. The question is designed to catch a candidate who recognises only the most familiar name, and each of the other three codes leaves out at least one genuine messaging service.
Note that offering additional features such as voice or video calling does not disqualify an application from being an instant messenger, since messaging remains its core function.
Hence all of (a), (b) and (c) are instant messaging applications.
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