New Cohort • 30 Frontend Challenges
Frontend Blind 30: Solve the most‑asked company questions
Prepare for top product‑based companies by solving their most‑asked frontend interview questions.
₹1499₹999
By purchasing this module, you agree to our Terms & Conditions.
One-time payment • Lifetime access
- ✓ 30 real interview questions
- ✓ Practice company‑wise problem sets
- ✓ Clear difficulty levels: Easy, Medium, Hard
- ✓ Step‑by‑step editorials with a live playground
Solve questions asked by
AtlassianGoogleAmazonMicrosoftUberLinkedInSwiggyPhonePe
Challenge breakdown
Difficulty wise breakdown
Easy• Beginner friendly
7
ProblemsMedium• Standard interview
10
ProblemsHard• Advanced rounds
13
ProblemsProblem type breakdown
Vanilla• Core JS
17
ProblemsReact• Modern UI
4
ProblemsHTML/CSS/JS• Web fundamentals
9
ProblemsTotal challenges
30
ProblemsCurriculum
| # | Problem name | Access | Level | Company | Tags | Completed |
|---|---|---|---|---|---|---|
| 1 | Implement listenTo() — Method Call Collector | Open | hard | Zeta | vanillajs | – |
| 2 | Dynamic Tic Tac Toe | Open | hard | Atlassian | html/css/js | – |
| 3 | Feature Flag | Open | medium | Atlassian | reactjs | – |
| 4 | Curry | Open | medium | Zepto | vanillajs | – |
| 5 | Traffic Light | Open | easy | Zepto | reactjs | – |
| 6 | Filter Records by Blacklisted Property–Value Pairs | Open | medium | Meta | vanillajs | – |
| 7 | Implement `getElementsByTagName` | Open | hard | vanillajs | – | |
| 8 | Dynamic Table Generator | Open | hard | html/css/js | – | |
| 9 | Nested Checkboxes | Open | medium | html/css/js | – | |
| 10 | Recursive Object Filter | Open | hard | Amazon | vanillajs | – |
| 11 | Find DOM elements by computed CSS - getElementsByStyle(property, value) | Open | hard | Amazon | vanillajs | – |
| 12 | Render a Directory Tree from Nested JSON | Open | hard | Amazon | html/css/js | – |
| 13 | Searchable, Sortable Data Table | Open | hard | Amazon | html/css/js | – |
| 14 | Word Break — Can a string be split into dictionary words? | Open | medium | Microsoft | vanillajs | – |
| 15 | Full‑Page Search with Highlighted Matches | Open | hard | Microsoft | html/css/js | – |
| 16 | Next Larger Palindromic Number | Open | medium | Uber | vanillajs | – |
| 17 | Run Dependent Async Tasks in Proper Sequence | Open | medium | Uber | vanillajs | – |
| 18 | StoreData — Key/Value Store with Change Listeners | Open | easy | Airbnb | vanillajs | – |
| 19 | Product of the Next Two (Circular Array) | Open | easy | Apple | vanillajs | – |
| 20 | Build an Image Gallery | Open | medium | Dropbox | html/css/js | – |
| 21 | Implement getElementsByClassName | Open | hard | vanillajs | – | |
| 22 | Build a Tooltip Component | Open | medium | html/css/js | – | |
| 23 | Build a Custom useDebounce Hook | Open | easy | Swiggy | reactjs, machinecoding | – |
| 24 | Run Promises in Series | Open | medium | PhonePe | vanillajs | – |
| 25 | Grid Lights in React — Deactivate in Reverse Activation Order (LIFO) | Open | hard | Uber | reactjs, machinecoding | – |
| 26 | Polyfill `JSON.stringify`- Custom Serialize | Open | hard | Amazon | vanillajs | – |
| 27 | Valid Palindrome (alphanumeric only, case-insensitive) | Open | easy | vanillajs | – | |
| 28 | Find All Pairs That Sum to Target | Open | easy | vanillajs | – | |
| 29 | Clear All Timeouts on a Page | Open | hard | Meta | vanillajs | – |
| 30 | Group Todos by User | Open | easy | Atlassian | html/css/js | – |
FAQ
Are these real questions asked in interviews?
Yes.
Is this lifetime access?
Yes.
What is the refund policy?
No refund policy.
The Ultimate Guide To Ace SDE Interviews.
2025 JsCafe Inc.
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2025 JsCafe Inc.