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Coding Education

Empower your classroom with interactive coding sessions, real-time monitoring, and instant feedback. The operating system for modern computer science education.

codeflixlabs.com/classroom/cs-101
main.js
tests.js
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function solveChallenge(input) {
// Filter even numbers
returninput.filter
}
Sarah Kim
Console Output
All tests passed
✓ Test Case 1: [1, 2, 3, 4] → [2, 4]
✓ Test Case 2: [10, 15, 20] → [10, 20]

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Data Structures Final Exam
14:59 remaining

Reverse Linked List

Given the head of a singly linked list, reverse the list, and return the reversed list. You must complete this in O(n) time.

Input: head = [1,2,3,4,5]
Output: [5,4,3,2,1]
/**
* Definition for singly-linked list.
* function ListNode(val, next) {
* this.val = (val===undefined ? 0 : val)
* this.next = (next===undefined ? null : next)
* }
*/
var reverseList = function(head) {
// write your code here...
};

Passed

12/12 Hidden Tests

Enterprise Testing

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technical assessments

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In-browser secure execution engine
Timer synchronization with server validation
Proctoring checks and auto-submit mechanisms
Instant automated grading and Recharts analytics

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Instant room creation
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Secure and private sessions
01

Create a Room

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02

Students Join

Students enter the code to join the session. They are instantly visible on the teacher's dashboard.

03

Start Coding

Select a challenge. Students code in real-time while teachers monitor progress and provide help.