Qualcomm Placement Papers 2024

Overview

This page collects Qualcomm placement papers from 2024 with previous-year questions, solutions, and the 2024 exam pattern. It is useful when you want real drive history: what the OA looked like, which question types repeated, and how solutions were approached. Work through the papers below to build speed and accuracy, then compare against newer 2025 material so your prep matches both established Qualcomm patterns and the latest shifts.

2024 Qualcomm Pattern

The 2024 Qualcomm placement process focused on technical skills and problem-solving. Understanding the 2024 pattern helps you prepare better for upcoming placements.

Download 2024 Placement Papers

Qualcomm 2024 paper 1→

Complete Qualcomm placement paper with coding questions and solutions

Qualcomm 2024 paper 2→

Additional 2024 Qualcomm paper with detailed solutions

Qualcomm 2024 paper 3→

Another 2024 Qualcomm paper with comprehensive solutions

Qualcomm exam pattern 2024

Section	Questions	Time	Difficulty	Focus Areas
Coding/Programming	2-3	60-90 min	Medium-Hard	DSA, algorithms, problem-solving
Technical MCQs	15-20	30-40 min	Medium	CS fundamentals, OOP, DBMS
Aptitude	10-15	20-30 min	Easy-Medium	Quantitative, logical reasoning

Total: 30-50 questions, 90-120 minutes

Key Changes in 2024:

• Updated question patterns
• Increased focus on practical skills
• New evaluation criteria

Qualcomm Placement Papers 2024 - actual questions & solutions

This section contains practice questions styled on Qualcomm placement papers 2024 (previous-year 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: rotate array right by k

Show solution

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 2: binary tree level order

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Problem Statement: Return the level-order traversal of a binary tree.

Example:

Input: [3,9,20,null,null,15,7]
Output: [[3],[9,20],[15,7]]

Solution (Java):

public List<List<Integer>> levelOrder(TreeNode root) {
    List<List<Integer>> res = new ArrayList<>();
    if (root == null) return res;
    Queue<TreeNode> q = new ArrayDeque<>();
    q.add(root);
    while (!q.isEmpty()) {
        int sz = q.size();
        List<Integer> level = new ArrayList<>();
        for (int i = 0; i < sz; i++) {
            TreeNode n = q.poll();
            level.add(n.val);
            if (n.left != null) q.add(n.left);
            if (n.right != null) q.add(n.right);
        }
        res.add(level);
    }
    return res;
}

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

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: 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 5: 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 6: two sum

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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: merge two sorted lists

Show solution

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 8

Q8: Which protocol is connection-oriented at the transport layer?

Solution:

TCP is connection-oriented; UDP is connectionless.

Answer: TCP

Question 9

Q9: Which normal form removes transitive dependency?

Solution:

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

Answer: 3NF

Question 10

Q10: Which data structure uses FIFO order?

Solution:

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

Answer: Queue

Question 11

Q11: Which SQL clause filters grouped rows after GROUP BY?

Solution:

HAVING filters aggregates; WHERE filters rows before grouping.

Answer: HAVING

2024 hiring trends

Hiring volume

2024 Data: Qualcomm hired 500-1000 candidates from top engineering colleges in 2024. The company conducted placement drives at 50+ colleges across India.

Salary packages

2024 Packages: ₹35-45 LPA for freshers

Process changes

2024 Updates: Updated online assessment platform, new interview formats

Key insights from 2024 Qualcomm 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, embedded systems, wireless communication
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: Qualcomm’s assessment platform or HackerRank
6. Focus Areas: DSA, algorithms, embedded systems, wireless communication, chip design basics

Qualcomm 2024 interview experiences

Based on candidate experiences from 2024 Qualcomm interviews:

2024 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, embedded systems concepts
3. Onsite Interviews (4-5 rounds, 45-60 minutes each):

• Coding rounds (2-3): Algorithms, data structures, problem-solving
• System Design rounds: Embedded systems, wireless communication, chip design
• Behavioral rounds: Problem-solving approach, innovation, teamwork

Common 2024 Interview Topics:

• Coding: Arrays, strings, trees, graphs, dynamic programming, embedded algorithms
• Technical: Embedded systems, wireless communication, chip design, C/C++ programming
• System Design: Embedded systems, wireless protocols, chip architecture
• Behavioral: Problem-solving, innovation, teamwork, impact
• Qualcomm Technologies: Snapdragon processors, wireless communication, 5G, embedded systems

2024 Interview Questions Examples:

• Two Sum Problem
• Reverse Linked List
• Embedded systems questions
• Wireless communication concepts
• Chip design basics

Success Tips:

• Strong coding performance is essential - solve problems optimally
• Understand embedded systems and wireless communication concepts
• Practice system design for embedded systems and wireless protocols
• Prepare examples demonstrating innovation and problem-solving
• Learn Qualcomm technologies - Snapdragon, 5G, wireless communication
• Practice explaining your thought process clearly

For detailed interview experiences, visit Qualcomm Interview Experience page.

Preparation tips for Qualcomm 2024 pattern

1. Master Coding Fundamentals: Focus on solving 2-3 coding problems correctly - arrays, trees, graphs, DP
2. Embedded Systems Knowledge: Strong understanding of embedded systems, C/C++ programming
3. Practice Previous Year Papers: Solve Qualcomm OA papers from 2020-2024 to understand patterns
4. Time Management: Practice completing 2-3 coding problems in 60-90 minutes
5. Technical MCQs: Practice CS fundamentals, OOP, embedded systems, wireless communication
6. LeetCode Practice: Solve 200+ LeetCode problems focusing on arrays, strings, trees, graphs (medium-hard difficulty)
7. Embedded Systems: Learn embedded systems, C/C++ programming, real-time systems
8. Wireless Communication: Understand wireless protocols, 5G, communication systems
9. Qualcomm Technologies: Learn Snapdragon processors, wireless communication, 5G, embedded systems
10. Behavioral Preparation: Prepare examples using STAR format - innovation, problem-solving, teamwork
11. Mock Tests: Take timed practice tests to improve speed and accuracy

Comments & Suggestions

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Preparation guide→

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