MeraEvents Interview Questions and Answers

A closure is a function that has access to variables in its outer scope, even after the outer function has returned.

• A closure is created when a function is defined inside another function.

• It allows the inner function to access variables in the outer function, even after the outer function has returned.

• Closures are used for data privacy, event handlers, and creating factory functions.

• Example: function outer() { let x = ...read more

Concurrency in NodeJS is managed using event loop, worker threads, and cluster module.

• NodeJS uses a single-threaded event loop to handle concurrency.

• Worker threads can be used to offload CPU-intensive tasks to separate threads.

• Cluster module can be used to create multiple worker processes to handle incoming requests.

• Use locks and semaphores to prevent race conditions and ensure data consistency.

• Avoid blocking I/O opera...read more

Social Media Marketing is important as it helps businesses reach their target audience, increase brand awareness, and drive sales.

• Allows businesses to connect with their target audience on a personal level

• Increases brand awareness and visibility

• Drives website traffic and sales

• Provides valuable insights into customer behavior and preferences

• Cost-effective compared to traditional marketing methods

• Examples: Coca-Cola's Sh...read more

Facebook, Instagram, Twitter, LinkedIn, and TikTok are popular social media platforms due to their unique features and large user base.

• Facebook has the largest user base and offers a variety of features including groups, pages, and events.

• Instagram is popular for its visual content and influencer marketing opportunities.

• Twitter is known for its real-time updates and trending hashtags.

• LinkedIn is a professional networki...read more

Social media can be both good and bad depending on how it is used.

• Social media can be used for positive purposes such as connecting with friends and family, promoting businesses, and raising awareness for important causes.

• However, it can also be used for negative purposes such as cyberbullying, spreading false information, and addiction.

• It is important to use social media responsibly and be aware of its potential conse...read more

Targeted ads are personalized advertisements shown to specific audiences based on their demographics, interests, and behaviors.

• Targeted ads use data to identify and reach specific audiences

• They increase the chances of conversion by showing relevant ads to interested users

• They help businesses save money by avoiding wasted ad spend on irrelevant audiences

• Examples include Facebook Ads, Google AdWords, and Instagram Ads

To increase engagement and followers on social media, focus on creating valuable content, using relevant hashtags, engaging with your audience, and running contests or giveaways.

• Create valuable content that resonates with your target audience

• Use relevant hashtags to increase visibility and reach

• Engage with your audience by responding to comments and messages

• Run contests or giveaways to incentivize engagement and attrac...read more