Phonepe Placement Papers 2025

Overview

This page is a working set of PhonePe placement papers from 2025: from student reports questions, the 2025 online assessment pattern, and step-by-step solutions. Use it to see what PhonePe 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 PhonePe drive.

Phonepe Online Assessment 2025 pattern

Section	Questions	Time	Difficulty	Focus Areas
Coding Problems	2-3	90 min	Medium-Hard	Arrays, trees, graphs, DP

Total: 2-3 problems, 90 minutes
Platform: HackerRank or similar
Languages Allowed: Java, Python, C++, Go
Success Rate: ~15-20% cleared OA and advanced to interviews

Phonepe Placement Papers 2025 - actual questions & solutions

This section contains practice questions styled on PhonePe 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: first non-repeating character

Show solution

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 2: 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 3: longest common prefix

Show solution

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 4: valid parentheses

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Problem Statement: Given a string of brackets, determine if it is valid.

Example:

Input: "()[]{}"
Output: true

Solution (Java):

public boolean isValid(String s) {
    Deque<Character> st = new ArrayDeque<>();
    Map<Character, Character> pair = Map.of(')', '(', ']', '[', '}', '{');
    for (char c : s.toCharArray()) {
        if (pair.containsValue(c)) st.push(c);
        else if (st.isEmpty() || st.pop() != pair.get(c)) return false;
    }
    return st.isEmpty();
}

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

Question 5: maximum subarray sum

Show solution

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 6: two sum

Show solution

Problem Statement: Given an array of integers and a target, return indices of two numbers that add up to target.

Example:

Input: nums = [2, 7, 11, 15], target = 9
Output: [0, 1]

Solution (Java):

public int[] twoSum(int[] nums, int target) {
    Map<Integer, Integer> map = new HashMap<>();
    for (int i = 0; i < nums.length; i++) {
        int need = target - nums[i];
        if (map.containsKey(need)) return new int[]{map.get(need), i};
        map.put(nums[i], i);
    }
    return new int[]{};
}

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

Question 7: check palindrome

Show solution

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 8

Q8: Virtual memory is typically implemented using?

Solution:

OS uses demand paging (and sometimes segmentation) to implement virtual memory.

Answer: Demand paging

Question 9

Q9: Which SQL clause filters grouped rows after GROUP BY?

Solution:

HAVING filters aggregates; WHERE filters rows before grouping.

Answer: HAVING

Question 10

Q10: Which protocol is connection-oriented at the transport layer?

Solution:

TCP is connection-oriented; UDP is connectionless.

Answer: TCP

Question 11

Q11: Which data structure uses FIFO order?

Solution:

FIFO = First In First Out → Queue. Stack is LIFO.

Answer: Queue

Key insights from 2025 Phonepe Online Assessment

Coding Section is Critical: Must solve 2-3 coding problems correctly to advance
DSA Focus: Strong emphasis on arrays, strings, trees, graphs, and dynamic programming
Time Management: 2-3 problems in 90 minutes requires excellent speed and accuracy
Payment System Focus: Problems often relate to payment systems, UPI, transactions, security, AI-powered features
System Design: Asked for SDE-1/2 roles, payment system design for fintech roles
Success Rate: Only 15-20% cleared OA and advanced to interviews
Platform: HackerRank or PhonePe’s internal platform
Focus Areas: Arrays, trees, graphs, dynamic programming, payment systems, UPI, AI/ML
Enhanced Emphasis: Optimal solutions, AI-powered UPI features, and cloud-native payment systems

Phonepe 2025 interview experiences

Based on recent candidate experiences from 2025 PhonePe interviews:

2025 Interview Process:

Online Assessment (90 minutes): 2-3 coding problems
Technical Phone Screen (45-60 minutes): Coding problems, algorithm discussions, UPI/payment concepts, AI/ML
Onsite/Virtual Interviews (4-5 rounds, 45-60 minutes each):

Coding rounds (2-3): Algorithms, data structures, problem-solving
System Design rounds: AI-powered UPI systems, payment processing, transaction systems, security, cloud-native architecture
Behavioral rounds: Problem-solving approach, security mindset, impact, AI/ML passion

2025 Interview Trends:

Increased emphasis on AI-powered UPI features and cloud-native payment systems
More focus on optimal solutions and security best practices
Enhanced behavioral questions about security mindset and innovation
Questions about AI/ML applications in UPI and payment processing

Common 2025 Interview Topics:

Coding: Arrays, strings, trees, graphs, dynamic programming, payment algorithms
System Design: AI-powered UPI systems, payment processing, transaction systems, security, cloud-native fintech architecture
Behavioral: Problem-solving, security mindset, teamwork, impact, AI/ML passion
PhonePe Technologies: UPI, AI-powered features, payment systems, transaction processing, cloud-native platforms

Success Tips:

Strong coding performance is essential - solve problems optimally
Understand UPI, AI-powered payment features, and cloud-native payment systems
Practice system design for AI-powered UPI systems and payment processing
Prepare examples demonstrating problem-solving and security mindset
Learn PhonePe’s products, AI features, and UPI technologies
Practice explaining your thought process clearly

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

Preparation tips for Phonepe 2025 pattern

Master Coding Fundamentals: Focus on solving 2-3 coding problems correctly - arrays, trees, graphs, DP
UPI/Payment Expertise: Strong understanding of UPI, AI-powered payment processing, cloud-native payment systems
Practice Previous Year Papers: Solve PhonePe OA papers from 2020-2025 to understand evolving patterns
Time Management: Practice completing 2-3 coding problems in 90 minutes
LeetCode Practice: Solve 200+ LeetCode problems focusing on arrays, strings, trees, graphs (medium-hard difficulty)
Fintech Focus: Practice problems related to payment systems, UPI, transactions, AI/ML in fintech
System Design Mastery: Learn AI-powered UPI system design, payment processing, transaction systems, security, cloud-native architecture
Security Knowledge: Understand security best practices for payment systems, UPI, and AI-powered fraud detection
Behavioral Preparation: Prepare examples using STAR format - problem-solving, security mindset, AI/ML passion
Mock Tests: Take timed practice tests to improve speed and accuracy
AI/ML in Fintech: Understand AI/ML applications in UPI and payment processing

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Phonepe Placement Papers 2025

Overview

Phonepe Online Assessment 2025 pattern

Phonepe Placement Papers 2025 - actual questions & solutions

Question 1: first non-repeating character

Question 2: reverse a string

Question 3: longest common prefix

Question 4: valid parentheses

Question 5: maximum subarray sum

Question 6: two sum

Question 7: check palindrome

Question 8

Question 9

Question 10

Question 11

Key insights from 2025 Phonepe Online Assessment

Phonepe 2025 interview experiences

Preparation tips for Phonepe 2025 pattern

Comments & Suggestions

Related resources

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