# Hackerrank Community Knowledge Base


## Getting Started

- [Introduction to HackerRank Community](https://help.hackerrank.com/articles/1995877061-introduction-to-hackerrank-community)

## Practice Coding Challenges

- [Introduction to Coding Challenges](https://help.hackerrank.com/articles/7845849982-introduction-to-challenges)
- [Coding Challenges FAQs](https://help.hackerrank.com/articles/1273631973-coding-challenges-faqs)

## Mock Interviews

- [Introduction to Mock Interview](https://help.hackerrank.com/articles/8988753946-introduction-to-mock-interview)
- [Technical Screen Mock Interview](https://help.hackerrank.com/articles/5671120169-technical-screen-mock-interview)
- [Coding Mock Interview](https://help.hackerrank.com/articles/6795045456-coding-mock-interview)
- [System Design Mock Interview](https://help.hackerrank.com/articles/8813699799-take-a-system-design-mock-interview)
- [Behavioural Mock Interview](https://help.hackerrank.com/articles/5174727491-behavioural-mock-interview)
- [AI Fluency Mock Interview](https://help.hackerrank.com/articles/3796809491-ai-fluency-mock-interview)

## Contests

- [Introduction to Contests](https://help.hackerrank.com/articles/7535813777-introduction-to-contest)
- [Create a Contest](https://help.hackerrank.com/articles/2437296876-create-a-contest)
- [Contests FAQs](https://help.hackerrank.com/articles/3733063247-contests-faqs)

## Certifications

- [Introduction to Certification](https://help.hackerrank.com/articles/2563639100-introduction-to-certification)
- [Obtain Role-Based or Skill-Based Certifications](https://help.hackerrank.com/articles/9788355678-obtain-skill-based-certifications)
- [Download Certificate](https://help.hackerrank.com/articles/2077861863-download-certificate)
- [Certifications FAQs](https://help.hackerrank.com/articles/8941367927-certifications-faqs)

## Prep Kits

- [Introduction to Prep Kits](https://help.hackerrank.com/articles/1723224478-introduction-to-prep-kits)

## Account Settings


### Manage Account

- [Create an Account](https://help.hackerrank.com/articles/9533293667-create-an-account)
- [Add or Delete Email Addresses](https://help.hackerrank.com/articles/4418407899-add-or-delete-email-addresses)
- [Change Username](https://help.hackerrank.com/articles/2553429617-change-username)
- [Update or Reset Password](https://help.hackerrank.com/articles/2403570133-update-or-reset-password)
- [Merge Multiple HackerRank Accounts](https://help.hackerrank.com/articles/5981889181-merge-multiple-hackerrank-accounts)
- [Export Account Data](https://help.hackerrank.com/articles/4689113963-export-account-data)
- [Delete an Account](https://help.hackerrank.com/articles/5618101592-delete-an-account)
- [Manage Account FAQs](https://help.hackerrank.com/articles/1917106962-manage-account-faqs)

### Profile and Preferences

- [Update Personal Details](https://help.hackerrank.com/articles/2857822759-update-personal-details)
- [Add or Edit Education Details](https://help.hackerrank.com/articles/7393075509-add-or-edit-education-details)
- [Add or Delete Links](https://help.hackerrank.com/articles/5212619529-add-or-delete-links)
- [Profile and Preferences FAQs](https://help.hackerrank.com/articles/4472358331-profile-and-preferences-faqs)

## Subscriptions, Payments, and Billing

- [HackerRank Subscription Plans](https://help.hackerrank.com/articles/9054300007-hackerrank-subscription-plans)
- [Upgrade Subscription Plan](https://help.hackerrank.com/articles/4312449655-upgrade-subscription-plan)
- [Downgrade Subscription Plan](https://help.hackerrank.com/articles/5432562533-downgrade-subscription-plan)
- [Cancel Subscription Plan](https://help.hackerrank.com/articles/6560545309-cancel-subscription-plan)
- [Purchase Mock Interview Credits](https://help.hackerrank.com/articles/3282259518-purchase-mock-interviews)
- [Subscriptions, Payments, and Billing FAQs](https://help.hackerrank.com/articles/9157064719-payments-and-billing-faqs)

## Additional Resources

- [General FAQs](https://help.hackerrank.com/articles/4609107971-general-faqs)
- [Best Practices for Receiving HackerRank Emails](https://help.hackerrank.com/articles/4438598153-best-practices-for-receiving-hackerrank-emails)
- [Troubleshooting Login Issues](https://help.hackerrank.com/articles/4147773232-troubleshooting-login-issues)
- [Notification](https://help.hackerrank.com/articles/4745765442-notification)

### Job Search and Applications

- [Search and Apply for Jobs](https://help.hackerrank.com/articles/1560975739-search-for-jobs)
- [Create a Resume with Resume Builder](https://help.hackerrank.com/articles/9106957203-create-a-resume-with-resume-builder)
- [Set Up HackerRank QuickApply](https://help.hackerrank.com/articles/7358354033-set-up-quick-apply)