Atlassian Placement Papers 2025

Overview

This page is a working set of Atlassian placement papers from 2025: from student reports questions, the 2025 online assessment pattern, and step-by-step solutions. Use it to see what Atlassian actually asked in the latest cycle, how hard the rounds were, and which themes (DSA, system design, aptitude, or role-specific topics) mattered most. Practice the problems below under timed conditions, then cross-check with the interview and preparation guides if you are targeting an upcoming Atlassian drive.

2025 Atlassian Pattern

The 2025 Atlassian placement process includes DSA and system design. Stay updated with the latest patterns and question types.

Download 2025 Placement Papers

Atlassian 2025 paper 1→

Latest Atlassian placement paper with coding problems and solutions

Atlassian 2025 paper 2→

Additional 2025 Atlassian paper with detailed solutions

Atlassian 2025 paper 3→

Another 2025 Atlassian paper with comprehensive solutions

Atlassian Online Assessment 2025 pattern

The 2025 exam pattern remains similar to 2024. For detailed exam pattern, see 2024 Papers.

Note: The pattern may have minor variations. Check the latest updates from the company.

Atlassian Placement Papers 2025 - actual questions & solutions

This section contains practice questions styled on Atlassian placement papers 2025 (recent-cycle pattern), with worked solutions. Use them as timed sectional drills - from student reports drives vary by college and role, so treat this as a high-signal practice bank, not an official paper dump.

Question 1: longest common prefix

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Problem Statement: Find the longest common prefix string amongst an array of strings.

Example:

Input: ["flower","flow","flight"]
Output: "fl"

Solution (Java):

public String longestCommonPrefix(String[] strs) {
    if (strs.length == 0) return "";
    String pref = strs[0];
    for (int i = 1; i < strs.length; i++) {
        while (!strs[i].startsWith(pref)) {
            pref = pref.substring(0, pref.length() - 1);
            if (pref.isEmpty()) return "";
        }
    }
    return pref;
}

Time Complexity: O(S)
Space Complexity: O(1)

Question 2: detect cycle in linked list

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Problem Statement: Return true if the linked list has a cycle.

Example:

Input: 3→2→0→-4→(back to 2)
Output: true

Solution (Java):

public boolean hasCycle(ListNode head) {
    ListNode slow = head, fast = head;
    while (fast != null && fast.next != null) {
        slow = slow.next;
        fast = fast.next.next;
        if (slow == fast) return true;
    }
    return false;
}

Time Complexity: O(n)
Space Complexity: O(1)

Question 3: climbing stairs

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Problem Statement: You can climb 1 or 2 steps. How many distinct ways to climb n stairs?

Example:

Input: n = 4
Output: 5

Solution (Java):

public int climbStairs(int n) {
    if (n <= 2) return n;
    int a = 1, b = 2;
    for (int i = 3; i <= n; i++) {
        int c = a + b; a = b; b = c;
    }
    return b;
}

Time Complexity: O(n)
Space Complexity: O(1)

Question 4: maximum subarray sum

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Problem Statement: Find the contiguous subarray with the largest sum.

Example:

Input: [-2, 1, -3, 4, -1, 2, 1, -5, 4]
Output: 6  // [4, -1, 2, 1]

Solution (Java):

public int maxSubArray(int[] nums) {
    int best = nums[0], cur = nums[0];
    for (int i = 1; i < nums.length; i++) {
        cur = Math.max(nums[i], cur + nums[i]);
        best = Math.max(best, cur);
    }
    return best;
}

Time Complexity: O(n)
Space Complexity: O(1)

Question 5: check palindrome

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Problem Statement: Return true if the string reads the same forward and backward (ignore case).

Example:

Input: "Level"
Output: true

Solution (Java):

public boolean isPalindrome(String s) {
    s = s.toLowerCase();
    int i = 0, j = s.length() - 1;
    while (i < j) {
        if (s.charAt(i++) != s.charAt(j--)) return false;
    }
    return true;
}

Time Complexity: O(n)
Space Complexity: O(1)

Question 6: first non-repeating character

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Problem Statement: Return the first non-repeating character in a string, or ‘_’ if none.

Example:

Input: "swiss"
Output: 'w'

Solution (Java):

public char firstUnique(String s) {
    int[] freq = new int[256];
    for (char c : s.toCharArray()) freq[c]++;
    for (char c : s.toCharArray()) if (freq[c] == 1) return c;
    return '_';
}

Time Complexity: O(n)
Space Complexity: O(1)

Question 7: reverse a string

Show solution

Problem Statement: Given a string, return it reversed.

Example:

Input: "placement"
Output: "tnemecalp"

Solution (Java):

public String reverse(String s) {
    return new StringBuilder(s).reverse().toString();
}

Time Complexity: O(n)
Space Complexity: O(n)

Question 8

Q8: Time complexity of binary search on a sorted array of n elements is?

Solution:

Each step halves the search space → O(log n).

Answer: O(log n)

Question 9

Q9: Worst-case time complexity of quicksort is?

Solution:

Unbalanced partitions (already sorted with bad pivot) → O(n²).

Answer: O(n²)

Question 10

Q10: Which SQL clause filters grouped rows after GROUP BY?

Solution:

HAVING filters aggregates; WHERE filters rows before grouping.

Answer: HAVING

Question 11

Q11: Which protocol is connection-oriented at the transport layer?

Solution:

TCP is connection-oriented; UDP is connectionless.

Answer: TCP

2025 hiring trends

Hiring volume

2025 Data: Atlassian is actively hiring 600-1200 candidates in 2025. The company is conducting placement drives at 60+ colleges across India.

Salary packages

2025 Packages: ₹30-40 LPA for freshers (updated packages)

Process updates

2025 Updates: Latest assessment tools, improved interview process

Key insights from 2025 Atlassian Online Assessment

1. Coding Section is Critical: Must solve 2-3 coding problems correctly to advance
2. Technical MCQs: Strong emphasis on CS fundamentals, OOP, system design, collaboration tools, AI features
3. Time Management: 2-3 coding problems in 60-90 minutes + 15-20 technical MCQs in 30-40 minutes + 10-15 aptitude in 20-30 minutes
4. Success Rate: Only 10-15% cleared OA and advanced to interviews
5. Platform: Atlassian’s assessment platform or HackerRank
6. Focus Areas: DSA, algorithms, system design, collaboration tools, developer productivity, AI features
7. Enhanced Emphasis: Optimal solutions, AI-powered developer tools, and cloud collaboration

Atlassian 2025 interview experiences

Based on recent candidate experiences from 2025 Atlassian interviews:

2025 Interview Process:

1. Online Assessment (90-120 minutes): Coding (2-3 problems) + Technical MCQs (15-20) + Aptitude (10-15)
2. Technical Phone Screen (45-60 minutes): Coding problems, algorithm discussions, system design, AI features
3. Onsite/Virtual Interviews (4-5 rounds, 45-60 minutes each):

• Coding rounds (2-3): Algorithms, data structures, problem-solving
• System Design rounds: AI-powered collaboration tools, developer productivity platforms, scalable systems
• Behavioral rounds: Problem-solving approach, innovation, teamwork, developer empathy

2025 Interview Trends:

• Increased emphasis on AI-powered developer tools and collaboration features
• More focus on optimal solutions and cloud-native collaboration platforms
• Enhanced behavioral questions about innovation and developer empathy
• Questions about AI features in collaboration tools and developer productivity

Common 2025 Interview Topics:

• Coding: Arrays, strings, trees, graphs, dynamic programming, collaboration algorithms
• System Design: AI-powered collaboration tools, developer productivity platforms, scalable systems, cloud collaboration
• Behavioral: Problem-solving, innovation, teamwork, developer empathy, AI/ML passion
• Atlassian Technologies: Jira, Confluence, Bitbucket, AI-powered features, cloud collaboration

Success Tips:

• Strong coding performance is essential - solve problems optimally
• Understand collaboration tools, AI-powered developer tools, and developer productivity concepts
• Practice system design for AI-powered collaboration platforms and scalable systems
• Prepare examples demonstrating innovation and developer empathy
• Learn Atlassian’s products, AI features, and collaboration tools
• Practice explaining your thought process clearly

For detailed interview experiences from 2025, visit Atlassian Interview Experience page.

Preparation tips for Atlassian 2025 pattern

1. Master Coding Fundamentals: Focus on solving 2-3 coding problems correctly - arrays, trees, graphs, DP
2. System Design Mastery: Learn AI-powered collaboration tool design, developer productivity platforms, scalable systems
3. Practice Previous Year Papers: Solve Atlassian OA papers from 2020-2025 to understand evolving patterns
4. Time Management: Practice completing 2-3 coding problems in 60-90 minutes
5. Technical MCQs: Practice CS fundamentals, OOP, system design, AI-powered collaboration concepts
6. LeetCode Practice: Solve 200+ LeetCode problems focusing on arrays, strings, trees, graphs (medium-hard difficulty)
7. Collaboration Tools: Understand AI-powered collaboration platforms, workflow systems, developer productivity
8. Atlassian Technologies: Learn Jira, Confluence, Bitbucket, AI-powered features, cloud collaboration
9. Behavioral Preparation: Prepare examples using STAR format - innovation, developer empathy, AI/ML passion
10. Mock Tests: Take timed practice tests to improve speed and accuracy
11. Developer Focus: Understand developer workflows, productivity challenges, and AI-powered solutions

Comments & Suggestions

Related resources

2024 papers→

Coding questions→

Interview experience→

Preparation guide→

Atlassian hub→

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