Paytm Placement Papers 2025

Overview

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

2025 Updates

The 2025 Paytm placement process maintains focus on DSA and system design.

Paytm Online Assessment 2025 pattern

Section	Questions	Time	Difficulty
Coding Problems	2-3	60 min	Medium-Hard
Debugging	1	30 min	Medium

Paytm Placement Papers 2025 - actual questions & solutions

This section contains practice questions styled on Paytm 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: 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 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: 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 4: rotate array right by k

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Problem Statement: Rotate the array to the right by k steps.

Example:

Input: [1,2,3,4,5,6,7], k = 3
Output: [5,6,7,1,2,3,4]

Solution (Java):

public void rotate(int[] nums, int k) {
    k %= nums.length;
    reverse(nums, 0, nums.length - 1);
    reverse(nums, 0, k - 1);
    reverse(nums, k, nums.length - 1);
}
void reverse(int[] a, int l, int r) {
    while (l < r) { int t = a[l]; a[l++] = a[r]; a[r--] = t; }
}

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

Question 5: merge two sorted lists

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Problem Statement: Merge two sorted linked lists and return a new sorted list.

Example:

Input: 1→2→4 , 1→3→4
Output: 1→1→2→3→4→4

Solution (Java):

public ListNode mergeTwoLists(ListNode a, ListNode b) {
    ListNode dummy = new ListNode(0), cur = dummy;
    while (a != null && b != null) {
        if (a.val <= b.val) { cur.next = a; a = a.next; }
        else { cur.next = b; b = b.next; }
        cur = cur.next;
    }
    cur.next = (a != null) ? a : b;
    return dummy.next;
}

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

Question 6: 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 7: reverse a string

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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: Which data structure uses FIFO order?

Solution:

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

Answer: Queue

Question 9

Q9: Which protocol is connection-oriented at the transport layer?

Solution:

TCP is connection-oriented; UDP is connectionless.

Answer: TCP

Question 10

Q10: In OOP, hiding internal details and showing only essential features is called?

Solution:

This is the definition of Encapsulation (often paired with abstraction in interviews).

Answer: Encapsulation

Question 11

Q11: Which normal form removes transitive dependency?

Solution:

1NF: atomic values. 2NF: no partial dependency. 3NF: no transitive dependency.

Answer: 3NF

2025 hiring trends

Expected hiring

• Total Hires: 200+ freshers
• SDE-1: 180+ selections

Salary packages

• SDE-1: ₹16-22 LPA

Key insights from 2025 Paytm Online Assessment

1. Coding Section is Critical: Must solve 2-3 coding problems correctly to advance
2. DSA Focus: Strong emphasis on arrays, strings, trees, graphs, and dynamic programming
3. Time Management: 2-3 problems in 90 minutes requires excellent speed and accuracy
4. Debugging: Always included - practice debugging skills thoroughly
5. Fintech Focus: Problems often relate to payment systems, transactions, security
6. System Design: Asked for SDE-1/2 roles, payment gateway design for fintech roles
7. Success Rate: Only 10-15% cleared OA and advanced to interviews
8. Platform: HackerRank or Paytm’s internal platform
9. Security Emphasis: Increased focus on security-related coding problems

Paytm 2025 interview experiences

Based on recent candidate experiences from 2025 Paytm interviews:

2025 Interview Process:

1. Online Assessment (90 minutes): 2-3 coding problems + 1 debugging question
2. Technical Phone Screen (45-60 minutes): Coding problems, algorithm discussions
3. Onsite Interviews (4-5 rounds, 45-60 minutes each):

• Coding rounds (2-3): Algorithms, data structures, problem-solving
• System Design round: Payment systems, fintech architecture for SDE-1+ roles
• Behavioral round: Problem-solving approach, security mindset, impact

2025 Interview Trends:

• Increased emphasis on security-related coding problems
• More focus on payment system design even for SDE-1 roles
• Enhanced behavioral questions about security mindset and compliance
• Questions about transaction processing and fraud detection

Common 2025 Interview Topics:

• Coding: Arrays, strings, trees, graphs, dynamic programming, security algorithms
• System Design: Payment gateway design, transaction processing, security systems, wallet systems
• Debugging: Code fixes, logic errors, security vulnerabilities
• Behavioral: Problem-solving examples, security mindset, impact on business metrics
• Fintech Knowledge: Payment systems, transaction processing, security best practices, compliance

2025 Interview Questions Examples:

• Array and string manipulation problems
• Tree and graph problems
• Design Paytm’s payment gateway (System Design)
• Design Paytm’s wallet system (System Design)
• Security-related coding problems

Success Tips:

• Strong coding performance is essential - solve problems optimally
• Practice debugging skills - this section is always included
• Learn fintech system design - payment gateways, transaction processing, security
• Prepare examples demonstrating problem-solving and security mindset
• Practice explaining your thought process clearly
• Focus on time management - 2-3 problems in 90 minutes
• Understand payment systems and security best practices in detail

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

Preparation tips for Paytm 2025 pattern

1. Master Coding Fundamentals: Focus on solving 2-3 coding problems correctly - arrays, strings, trees, graphs
2. Practice Previous Year Papers: Solve Paytm OA papers from 2020-2025 to understand evolving patterns
3. Time Management: Practice completing 2-3 coding problems in 60 minutes, debugging in 30 minutes
4. Debugging Practice: Practice debugging code - identify and fix logic errors, security issues
5. System Design Mastery: Learn fintech system design - payment gateways, transaction processing for SDE-1+
6. LeetCode Practice: Solve 200+ LeetCode problems focusing on arrays, strings, trees (medium-hard difficulty)
7. Fintech Focus: Practice problems related to payment systems and transactions
8. Security Knowledge: Understand security best practices for payment systems in detail
9. Mock Tests: Take timed practice tests to improve speed and accuracy
10. Dynamic Programming: Practice DP problems - frequently asked
11. Compliance Knowledge: Understand payment system compliance and regulations

Related resources

Paytm 2024 papers→

Previous year Paytm placement papers with questions and solutions

Paytm coding questions→

Complete collection of Paytm coding problems with solutions

Paytm interview experience→

Real interview experiences from successful candidates

Paytm preparation guide→

Comprehensive preparation strategy for Paytm placement

Paytm main page→

Complete Paytm placement guide with eligibility, process, and salary

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Practice 2025 papers to stay updated with latest patterns and prepare effectively!