machine-coding-task-list.md

Machine Coding Tasks List

This repository contains various frontend machine coding tasks used in interviews at top tech companies.

Main Machine Coding Tasks

1. Form Validation
2. Todo App
3. Search and Filter List
4. Pagination (Large API Data - Client Side)
5. Debouncing Search
6. Throttle Search
7. Sorting Features
8. Persistent Counter App (Local Storage)
9. Modal Open/Close Features
10. Theme Toggle (Dark/Light Mode)
11. Autocomplete Search Bar
12. Progress Bar
13. Move to Top
14. Auto-focusing Form and Validation
15. Tooltip Hover
16. Live Clock
17. Accordion
18. Click to Clipboard
19. Infinite Scroll Bar
20. Image Carousel
21. Drag and Drop Interaction
22. Responsive Navbar
23. Multi-Step Form
24. OTP (One Time Password)
25. React Toast Notifications
26. Star Rating
27. File Explorer
28. Virtualized List
29. Tab Components
30. Traffic Light
31. Like Button
32. Calculator
33. File Upload Preview
34. Avatar Upload and Crop
35. Data Table
36. Responsive Layout System (Without Framework)
37. Accessible Form System
38. Multi-Step Form Validation & State Persistence
39. Skeleton Loader
40. Error Boundaries
41. File Upload System (Progress & Retry)
42. Toast and Notification Pattern
43. Theme Switch (Light and Dark)
44. Real-time Collaboration UI
45. Role-based UI Rendering
46. Complex Dashboard with Data State
47. News Feed Infinite Scrolling
48. Tab Components
49. Chips Input
50. Tree Folder Navigation
51. Multi-level Comments View
52. Kanban Board
53. Email Client View (Email template)
54. Drag and Drop
55. Web Audio Player
56. Browser History API
57. Implement Custom Hooks
58. Auth Guard / Permission-based Routing
59. Tic-Tac-Toe (N×N, winner check)
60. Nested checkbox tree (tri-state parent)
61. Calendar day view with overlapping events
62. Date picker / calendar
63. Spreadsheet / Excel with formulas
64. Job board (Hacker News API, load more)
65. Grid lights / selectable cells (drag-select)
66. Concurrent progress bars (max 3 at once)
67. Multi-select dropdown with search
68. Transfer list (move items between 2 lists)
69. Stopwatch / countdown / Pomodoro timer
70. Image gallery + lightbox / masonry (Pinterest)
71. Chat UI (WhatsApp / YouTube live chat)
72. Seat booking (BookMyShow / flight)
73. E-commerce listing + cart + filters (URL synced)
74. Food menu + cart (Swiggy/Zomato)
75. Command palette (Cmd+K)
76. @mention in textarea
77. Rich text / Markdown editor with preview
78. Drawing board / whiteboard (canvas) + undo/redo
79. Undo/redo for any form
80. Range slider (dual thumb)
81. Poll / quiz widget
82. Typing speed test / Wordle / Snake / Memory game
83. Bar chart / histogram without a library
84. Nested dropdown / mega menu
85. Popover / dropdown positioning (flip on edge)
86. Scrollspy / table of contents
87. Resizable split panes
88. Image comparison slider (before/after)
89. Password strength + signup form
90. GitHub user search / weather app (API + cache)
91. Optimistic UI (like/comment with rollback)
92. i18n / language switcher
93. Feature-flag driven UI
94. Web Worker for heavy computation
95. Offline-first / PWA (service worker)

Company-Specific Tasks

Amazon

96. Custom implementation of the Promise API
97. Implement custom reduce()
98. Implement Auto-retry promises
99. Implement Currying with Placeholders
100. Implement lodash _.get()
101. Implement Promise.all
102. Implement Promise.allSettled

Flipkart

103. Implement Auto-retry Promises
104. Implement Currying with Placeholders
105. Implement Custom Bind
106. Implement Custom SetInterval
107. Implement Debounce
108. Implement Deep Flatten

Google

109. Implement promises.finally
110. Implement throttle
111. Implement custom promises
112. Promise Polyfills
113. Rate Limiting

Meta

114. Custom JSON Utilities
115. Debounce
116. Event Emitter
117. Performance: Implement caching mechanism
118. Timer Management
119. Virtual DOM

Tekion

120. Implement currying
121. Implement deep clone
122. Implement throttling

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123. Password Generator