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Qualcomm Senior Java Developer Interview Questions and Answers

Updated 1 Feb 2024

Qualcomm Senior Java Developer Interview Experiences

1 interview found

Interview experience
3
Average
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Approached by Company and was interviewed in Jan 2024. There was 1 interview round.

Round 1 - Technical 

(2 Questions)

  • Q1. Mostly questions on Java 8 features, Spring basics some basic live examples
  • Q2. Steam operations of student objects
  • Ans. 

    Using Java Stream operations to manipulate student objects

    • Use Stream API to perform operations on a collection of student objects

    • Apply filter, map, reduce, and other stream operations to transform and manipulate data

    • Use lambda expressions to define the operations to be performed on each student object

    • Example: filtering students based on a certain criteria, mapping student names to uppercase, calculating the average gra...

  • Answered by AI

Skills evaluated in this interview

Interview questions from similar companies

Interview Questionnaire 

9 Questions

  • Q1. Tree questions related like traversal?
  • Q2. Locate the sum of 2 numbers in a linear array (Unsorted and sorted) and their complexities
  • Ans. 

    Locate sum of 2 numbers in a linear array (unsorted and sorted) and their complexities

    • For unsorted array, use nested loops to compare each element with every other element until the sum is found

    • For sorted array, use two pointers approach starting from the beginning and end of the array and move them towards each other until the sum is found

    • Complexity for unsorted array is O(n^2) and for sorted array is O(n)

  • Answered by AI
  • Q3. Pointers with increment/decrement, address of and value at operators (++,–,*,&)
  • Ans. 

    Pointers are used to manipulate memory addresses and values in C++. Increment/decrement, address of and value at operators are commonly used.

    • Incrementing a pointer moves it to the next memory location of the same data type

    • Decrementing a pointer moves it to the previous memory location of the same data type

    • The address of operator (&) returns the memory address of a variable

    • The value at operator (*) returns the value sto...

  • Answered by AI
  • Q4. A point and a rectangle is present with the given coordinates. How will you determine whether the point is inside or outside the rectangle?
  • Q5. There is a point inside the rectangle. How will you determine the line that passes through the point and divides the rectangle into 2 equal halves?
  • Q6. There is a scheme which contains 8-bit and 16-bit signed numbers. How many such combinations are possible?
  • Ans. 

    There are multiple combinations of 8-bit and 16-bit signed numbers. How many such combinations are possible?

    • There are 2^8 (256) possible combinations of 8-bit signed numbers.

    • There are 2^16 (65,536) possible combinations of 16-bit signed numbers.

    • To find the total number of combinations, we can add the number of combinations of 8-bit and 16-bit signed numbers.

    • Therefore, the total number of possible combinations is 256 + ...

  • Answered by AI
  • Q7. You are given an array of elements. Some/all of them are duplicates. Find them in 0(n) time and 0(1) space. Property of inputs – Number are in the range of 1..n where n is the limit of the array
  • Ans. 

    Find duplicates in an array of elements in 0(n) time and 0(1) space.

    • Use the property of inputs to your advantage

    • Iterate through the array and mark elements as negative

    • If an element is already negative, it is a duplicate

    • Return all the negative elements as duplicates

  • Answered by AI
  • Q8. Given a array of digits. print all combination of of these i.e all no formed by these. repetition allowed. and then repetition not allowed example: i/p: arr={1,2,3} o/p: (without repetition) 123, 132, 213,...
  • Ans. 

    Generate all combinations of digits from an array, allowing and disallowing repetition.

    • Use recursion or backtracking to generate combinations.

    • For repetition allowed: e.g., arr={1,2}, combinations are 11, 12, 21, 22.

    • For repetition not allowed: e.g., arr={1,2,3}, combinations are 123, 132, 213, 231, 312, 321.

    • Utilize a set to track used digits when repetition is not allowed.

  • Answered by AI
  • Q9. Questions on project

Interview Preparation Tips

Round: Test
Duration: 90 minutes
Total Questions: 3

Round: HR Interview
Experience: HR interview was all about my projects, my background and a few more typical HR questions. It was pretty easy to answer them.

Skills: Algorithm, Data structure, C++
College Name: IIT ROORKEE

Skills evaluated in this interview

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I appeared for an interview before May 2016.

Interview Preparation Tips

Round: written test
Experience: it was elitmus test conducted by the company itself on campus. As per my knowledge only those scoring 90 percentile got selected for round 2.
Tips: Attempt only those ques that are necessary for scoring 90+ in e litmus. Specially in verbal don't attempt more then required questions, though you might be tempted. The aim is not to score max bt to score 90+

Round: Technical Interview
Experience: This was a programming based round. I was asked to write algorithms for various array linked list based problems. There was cross questioning prompting to reduce complexity and to use different data structures for same problems.

Mostly it focused on subjects like c, data structures and ADA.
Tips: Be clear with basic of data structures and algorithms. Pointers, queue, stacks, array linked lists, sorting etc are the keywords.

Round: Technical Interview
Experience: This was a information security specific round since that was my major. In depth cross questioning on my thesis topics, honeypots, network intrusion etc. Security certificates, and on the go problems to provide security solution layer wise in different scenarios. Security concept of torrents was also asked in detail.
Tips: It was more of a security discussion and throwing of ideas about how things in a particular case could work or could not. Don't worry about right or wrong answer just be clear with your reasoning about the solution you are suggesting.

Round: Other Interview
Experience: I don't know what to name this round, but it focused mainly on developing test cases for an object. Say they gave me a stapler and said to develop a test plan listing down test cases for a given object to pass so that it can be confirmed that it is a stapler. Another scenario was with a lift.
Tips: This is one round where your presence of mind and inter personal skills matter. I think the way you present your thoughts was most important here.

Round: Behavioural Interview
Experience: This was was mostly about how would you react in a given professional situation
Like your assigned work could not be completed on time, or if you are doing something wrong with the work assigned.
Tips: This is all about inter personal skills and putting your best foot forward :)

College Name: Indira Gandhi Delhi Technical University For Women, Delhi

I appeared for an interview before Apr 2021.

Round 1 - Coding Test 

(2 Questions)

Round duration - 75 minutes
Round difficulty - Medium

This was an online coding round where I had 2 questions to solve under 75 minutes. Both the coding questions were of Medium to Hard level of difficulty.

  • Q1. 

    Smallest Window Problem Statement

    Given two strings, S and X, your task is to find the smallest substring in S that contains all the characters present in X.

    Example:

    Input:
    S = "abdd"
    X = "bd"
    Output:
    ...
  • Q2. 

    K - Sum Path In A Binary Tree

    Given a binary tree where each node contains an integer value, and a value 'K', your task is to find all the paths in the binary tree such that the sum of the node values in ...

  • Ans. 

    Find all paths in a binary tree where the sum of node values equals a given value 'K'.

    • Traverse the binary tree using DFS and keep track of the current path and its sum.

    • At each node, check if the current sum equals 'K' and add the path to the result.

    • Continue traversal to the left and right child nodes recursively.

    • Return the list of paths that sum up to 'K'.

  • Answered by AI
Round 2 - Video Call 

(4 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

This round had 2 questions of DS/Algo to solve under 60 minutes and 2 questions related to Operating Systems.

  • Q1. 

    Validate Partial Binary Search Tree (BST) Problem Statement

    You are provided with a binary tree containing 'N' nodes. Your task is to determine if this tree is a Partial Binary Search Tree (BST). Return t...

  • Ans. 

    Validate if a binary tree is a Partial Binary Search Tree (BST) by checking if each node's left subtree contains nodes with data less than or equal to the node's data, and each node's right subtree contains nodes with data greater than or equal to the node's data.

    • Check if each node's left subtree follows BST property (data <= node's data) and right subtree follows BST property (data >= node's data)

    • Recursively che...

  • Answered by AI
  • Q2. 

    Longest Increasing Subsequence Problem Statement

    Given an array of integers with 'N' elements, determine the length of the longest subsequence where each element is greater than the previous element. This...

  • Q3. Can you define process and threads in operating systems?
  • Q4. What are the different types of semaphores?
Round 3 - Video Call 

(3 Questions)

Round duration - 60 Minutes
Round difficulty - Hard

In this round, I was asked 3 coding questions out of which I had to implement the first two and for the last question I was only asked the optimal approach. The main challenge in this round was to implement the first two questions in a production ready manner without any bugs and so I had to spent some time thinking about some Edge Cases which were important with respect to the question.

  • Q1. 

    Next Greater Element Problem Statement

    You are given an array arr of length N. For each element in the array, find the next greater element (NGE) that appears to the right. If there is no such greater ele...

  • Q2. 

    Power Set Generation

    Given a sorted array of 'N' integers, your task is to generate the power set for this array. Each subset of this power set should be individually sorted.

    A power set of a set 'ARR' i...

  • Q3. 

    Counting Sort Problem Statement

    Ninja is learning about sorting algorithms, specifically those that do not rely on comparisons. Can you help Ninja implement the counting sort algorithm?

    Example:

    Input:
    ...

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPACadence Design Systems interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, OS, DBMS, Aptitude, OOPSTime required to prepare for the interview - 4 MonthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewSelected

Skills evaluated in this interview

What people are saying about Qualcomm

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marvel98
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What is the salary of a Program Analyst at Qualcomm?
Hi, I recently interviewed for the Program Analyst- Data Analyst role at Qualcomm and have cleared all rounds. But I wanted to know what the salary range one can expect for this band-level(?) at Qualcomm. My total experience is 6 years.
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Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Coding Test 

Hirepro , 2 easy to medium coding questions with technical questions

Round 3 - One-on-one 

(2 Questions)

  • Q1. DSA questions were asked they were easy
  • Q2. Insert a node at the middle of a linked list
  • Ans. 

    To insert a node at the middle of a linked list, find the middle node and adjust pointers accordingly.

    • Find the middle node using slow and fast pointers

    • Adjust pointers to insert the new node at the middle

  • Answered by AI
Round 4 - HR 

(1 Question)

  • Q1. Puzzle and general question

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

I appeared for an interview before Mar 2024.

Round 1 - HR 

(1 Question)

  • Q1. Salary discussion
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected Selected

I applied via Company Website and was interviewed before Jan 2023. There were 2 interview rounds.

Round 1 - Coding Test 

Simple Python Coding questions.

Round 2 - One-on-one 

(1 Question)

  • Q1. Logical questions on Memory allocation.

Interview Preparation Tips

Interview preparation tips for other job seekers - Look at problems asked to solve with a open mind, it will really help answering the questions.
Are these interview questions helpful?

I appeared for an interview before Sep 2020.

Round 1 - Video Call 

(1 Question)

Round duration - 45 minutes
Round difficulty - Medium

Its a zoom call interview which lasted for 45 minutes. initially there are two panel members in which one is very targetting at me. They asked me different type of questions like jumping from DSA to project then to python then again java. Its a mixed combo pack type interview. for each and every question they asked me the real time example. The discussion on my project lasted for 15-20 mins.

  • Q1. 

    Count Set Bits Problem Statement

    Given a positive integer N, compute the total number of '1's in the binary representation of all numbers from 1 to N. Return this count modulo 1e9+7 because the result can...

Round 2 - Video Call 

Round duration - 30 mins
Round difficulty - Easy

This round was a zoom interview. The interview started with my brief introduction. This time the interview was more interested in my hobbies and passions. He asked me what do you do to keep yourself updated with the latest technology trends?

Interview Preparation Tips

Professional and academic backgroundI applied for the job as SDE - 1 in HyderabadEligibility criteriaAbove 8CGPAMicron Technology interview preparation:Topics to prepare for the interview - Apptitude, C, Java, Data Structures and Algorithms, DBMSTime required to prepare for the interview - 2 monthsInterview preparation tips for other job seekers

Tip 1 : Do participate in all the coding contests, long challenges held by codechef, codeforces
Tip 2 : Practice all kinds of problems on leetcode, gfg, coding ninjas
Tip 3 : When you are writing a written exam for a particular company, make sure you get to know about the company in detail.

Application resume tips for other job seekers

Tip 1 : Make your resume short and sweet(mostly 1 page, max 2 pages) is preferred.
Tip 2 : Make sure your resume is crisp rather than descriptive
Tip 3 : Do not lie on your resume

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Hard
Process Duration
4-6 weeks
Result
No response

I appeared for an interview in May 2025, where I was asked the following questions.

  • Q1. Explain some of the projects in depth which you did in previous company?
  • Ans. 

    Led a team to develop a scalable cloud-based application for real-time data analytics in the finance sector.

    • Designed a microservices architecture to enhance scalability and maintainability.

    • Implemented CI/CD pipelines using Jenkins and Docker for automated testing and deployment.

    • Utilized AWS services like Lambda and S3 for serverless computing and data storage.

    • Collaborated with cross-functional teams to gather requireme...

  • Answered by AI
  • Q2. Situational based questions, for checking problem solving skills as per job description and your resume
Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(2 Questions)

  • Q1. Last Project details
  • Ans. 

    Designed and implemented a cloud-based data analytics platform for real-time monitoring of network performance.

    • Led a team of 5 engineers in developing the platform using AWS services such as EC2, S3, and Lambda functions

    • Integrated data visualization tools like Tableau for generating reports and dashboards

    • Implemented machine learning algorithms for predictive analysis of network outages

    • Collaborated with stakeholders to ...

  • Answered by AI
  • Q2. SV -UVM questions

Qualcomm Interview FAQs

How many rounds are there in Qualcomm Senior Java Developer interview?
Qualcomm interview process usually has 1 rounds. The most common rounds in the Qualcomm interview process are Technical.
How to prepare for Qualcomm Senior Java Developer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Qualcomm. The most common topics and skills that interviewers at Qualcomm expect are Application Development, Computer science, Data Structures, Informatica and Information Technology.
What are the top questions asked in Qualcomm Senior Java Developer interview?

Some of the top questions asked at the Qualcomm Senior Java Developer interview -

  1. Steam operations of student obje...read more
  2. Mostly questions on Java 8 features, Spring basics some basic live examp...read more

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Overall Interview Experience Rating

3/5

based on 1 interview experience

Difficulty level

Easy 100%

Duration

Less than 2 weeks 100%
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