Atlassian Coding Questions - DSA Problems & Solutions

Company Overview

This page contains Atlassian coding questions from Atlassian OA placement papers with detailed solutions.

Coding Focus

Atlassian OA coding section includes 2-3 problems focusing on DSA and full-stack development concepts. Master arrays, trees, graphs, and system design to succeed.

Atlassian Coding Questions Overview

Atlassian OA Coding Section:

• Problems: 2-3 coding problems
• Time: 90 minutes
• Languages: Java, Python

Coding Problems

Question 1: Merge Intervals

Q1: Merge overlapping intervals.

Solution (Java):

public int[][] merge(int[][] intervals) {
    Arrays.sort(intervals, (a, b) -> Integer.compare(a[0], b[0]));
    List<int[]> merged = new ArrayList<>();

    for (int[] interval : intervals) {
        if (merged.isEmpty() || merged.get(merged.size() - 1)[1] < interval[0]) {
            merged.add(interval);
        } else {
            merged.get(merged.size() - 1)[1] =
                Math.max(merged.get(merged.size() - 1)[1], interval[1]);
        }
    }

    return merged.toArray(new int[merged.size()][]);
}

Time Complexity: O(n log n)

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