Can You Pass The Social Media Quiz Challenge?

All of the social networking sites mentioned in the options, including Facebook, LinkedIn, Twitter, and YouTube, have both mobile apps and mobile versions of their sites. Therefore, the correct answer is "None of the above" as none of them lack an app or mobile version.

Susan Boyle's career was launched through a viral video of her audition on the reality show "Britain's Got Talent," which was uploaded on YouTube. The video gained millions of views and caught the attention of media outlets worldwide, leading to her overnight fame and success.

The character limit for posting on Twitter is 140. This means that each tweet can contain up to 140 characters, including letters, numbers, spaces, and punctuation marks. This limit was initially set by Twitter to fit within the constraints of SMS messaging, which had a maximum limit of 160 characters. The 140-character limit has become a defining feature of Twitter, encouraging users to be concise and creative in their messages.

Larry Page and Sergei Brin founded Google. They were both PhD students at Stanford University when they developed a search engine algorithm called PageRank, which formed the basis of Google's search technology. They founded Google in 1998, with the mission to organize the world's information and make it universally accessible and useful. Since then, Google has grown into one of the largest and most influential technology companies in the world, offering a wide range of products and services beyond search.

70% of Facebook users access the network from a smartphone. This means that a significant majority of Facebook users prefer to use their smartphones to access and engage with the platform. The high percentage suggests that Facebook has successfully optimized its mobile app and website, making it convenient and user-friendly for smartphone users. It also highlights the increasing trend of mobile usage for social media platforms, as smartphones provide easy access to Facebook on-the-go.

Instagram is not independent of the others because it is owned by Facebook. In 2012, Facebook acquired Instagram, making it a subsidiary of the company. This means that Instagram is integrated with Facebook's infrastructure and shares resources and data with it. Therefore, it cannot be considered an independent social network.

Coca-Cola has the most followers on Facebook because it is a globally recognized brand with a large customer base. The company has invested heavily in social media marketing, including Facebook, to engage with its audience and promote its products. Coca-Cola's popularity and extensive marketing efforts have likely contributed to its large number of followers on Facebook.

MySpace was once a popular social media site, but it has significantly declined in popularity over the years. Compete and Alexa, which are reputable sources for website rankings, have determined that MySpace is currently the 5th most popular social media site in terms of monthly visitors. This suggests that despite its decline, MySpace still attracts a considerable number of users compared to other social media platforms.

The fastest growing age bracket on Google+ and Facebook is 45-54. This age group is experiencing a significant increase in users on these platforms. This could be due to various factors, such as increased internet access and adoption of social media among older individuals. Additionally, this age group may be more inclined to join social media platforms to connect with family and friends, share experiences, and stay updated with current trends and news.

A realistic engagement rate on Facebook is 0.25% because it is a moderate percentage that indicates a decent level of interaction and involvement from the audience. This rate suggests that a significant number of people are actively engaging with the content, such as liking, commenting, or sharing posts. A higher engagement rate would be considered exceptional, while a lower rate would indicate a lack of interest or ineffective content strategy.