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Qualcomm Associate Engineer Interview Questions, Process, and Tips
Top Qualcomm Associate Engineer Interview Questions and Answers
- Q1. Maximal Ratio Combining in MIMO, Quantization Noise power
- Q2. Gaussian mixture, pdf of sum of 2 RV
- Q3. Implement search, insert and delete nodes in binary trees.
Qualcomm Associate Engineer Interview Experiences
25 interviews found
Tanya Goyal
(2 Questions)
- Q1. Linked list middle node, bit manipulation
- Q2. Wireless questions
Anonymous
Selected
I applied via Referral and was interviewed in Apr 2024. There were 2 interview rounds.
Running stream median, priority queue, binary search, dp basic
(2 Questions)
- Q1. Cycle in linked list
- Ans.
A cycle in a linked list occurs when a node points to a previous node in the list, creating a loop.
Check for a cycle using two pointers - one moving one node at a time and the other moving two nodes at a time.
If the two pointers meet at any point, there is a cycle in the linked list.
Example: 1 -> 2 -> 3 -> 4 -> 2 (points back to 2), this linked list has a cycle.
- Q2. Construct a tree from pre and post.
- Ans.
Construct a tree from pre and post order traversal arrays.
Start by creating a root node using the first element of the pre-order array.
Find the index of the root node in the post-order array to divide it into left and right subtrees.
Recursively build the left and right subtrees.
Repeat the process for each subtree until the tree is fully constructed.
Interview Preparation Tips
Skills evaluated in this interview
(1 Question)
- Q1. C pointer deep copy ?
30 min pof test of verbal, reasoning
Qualcomm interview questions for designations
5 coding questions with medium to tough difficult level
(1 Question)
- Q1. Technical round on coding knowledge
Get interview-ready with Top Qualcomm Interview Questions
Selected
I applied via campus placement at National Institute of Technology (NIT), Jamshedpur and was interviewed before Oct 2022. There were 5 interview rounds.
Coding MCQ questions, CS fundamentals and aptitude MCQ
(1 Question)
- Q1. Define workqueues, OS related concepts etc
- Ans.
Workqueues are data structures used in operating systems to manage tasks and prioritize their execution.
Workqueues are used to schedule and manage tasks in an operating system.
They help in prioritizing tasks based on their importance and urgency.
Workqueues are commonly used in kernel programming to handle asynchronous tasks.
Examples of workqueues include the Linux kernel workqueue and Windows kernel workqueue.
(1 Question)
- Q1. Implement search, insert and delete nodes in binary trees.
- Ans.
Implement search, insert, and delete operations in binary trees.
For search operation, start at the root and recursively search left or right subtree based on the value being searched.
For insert operation, start at the root and recursively find the correct position to insert the new node.
For delete operation, find the node to be deleted, handle different cases (no child, one child, two children) accordingly.
(1 Question)
- Q1. What are you strength and weaknesses?
Interview Preparation Tips
Skills evaluated in this interview
Associate Engineer Jobs at Qualcomm
Digital electronics ,VLSi,C,Quants
(1 Question)
- Q1. All basic questions in core
(3 Questions)
- Q1. Why are you looking for a change?
- Q2. What are your strengths and weaknesses?
- Q3. Tell me about yourself.
Interview Preparation Tips
Easy Electronics
ARTHI S ee15m014
I applied via campus placement at Indian Institute of Technology (IIT), Chennai and was interviewed before Dec 2015. There were 3 interview rounds.
Interview Questionnaire
7 Questions
- Q1. Gaussian mixture, pdf of sum of 2 RV
- Ans.
The question is about calculating the probability density function (pdf) of the sum of two random variables (RV) following a Gaussian mixture distribution.
A Gaussian mixture distribution is a combination of multiple Gaussian distributions.
To calculate the pdf of the sum of two RVs, convolve the pdfs of the individual RVs.
Convolution involves integrating the product of the pdfs over the entire range of possible values.
T...
- Q2. Maximal Ratio Combining in MIMO, Quantization Noise power
- Ans.
Maximal Ratio Combining (MRC) is a technique used in MIMO systems to improve signal quality by combining multiple received signals.
MRC combines the received signals from multiple antennas to maximize the signal-to-noise ratio (SNR)
Quantization noise power refers to the noise introduced during the process of converting analog signals to digital signals
In MIMO systems, MRC can be used to mitigate the effects of quantizat...
- Q3. Viterbi decoder
- Q4. Average Energy, Pe in PAM, QAM
- Q5. Asymptotic bound on capacity
- Ans.
The asymptotic bound on capacity refers to the maximum amount of data that can be transmitted through a communication channel.
Asymptotic bound on capacity is a theoretical limit that determines the maximum data rate of a channel.
It is influenced by factors such as bandwidth, signal-to-noise ratio, and channel coding.
Shannon's capacity formula is often used to calculate the asymptotic bound on capacity.
For example, a ch...
- Q6. MMSE derivation
- Q7. Internship details
Interview Preparation Tips
Experience: Asked to derive and explain all the questions
Tips: Be confident and carefully listen to the questions
Round: Technical Interview
Experience: Asked to derive and explain all the questions
Tips: Be confident and carefully listen to the questions
Round: HR Interview
Experience: Discussion on internship, job details and interview performance
Tips: No need to be worry since if you are attending HR, its most likely that you will get the offer
Skills: Wireless Communication, Information Theory, Probability Concepts, Approaching A Problem, Knowledge Gained Through Recent Research Project, Communication Systems
College Name: IIT Madras
Skills evaluated in this interview
Interview Preparation Tips
Experience: The first round was a written round. The paper had three sections: Aptitude , C and DSP.
Round: Technical Interview
Experience: 14-15 people were shortlisted for the second round (Technical Interview round). Questions were asked on topics like Digital System Design, DECA and VLSI (Sequence detector questions, FSM based questions and MOSFET based questions)
Round: HR Interview
Experience: 3 people were shortlisted for the HR round. The general trend is that, you make it to the HR round, You have almost grabbed the Intern :) . Usual questions like "why Qalcomm?", "What is special about you?", "What are your strengths and weaknesses?" etc. were asked.
General Tips: For interns: Be thorough with DECA, MOSFETS and DSD. These are the areas on which Qualcomm's work focuses on. It will be a plus point if you know VLSI.
For fresh grads: You need to be thorough with VLSI design in addition to the above mentioned topics.
Skill Tips: I went through DECA notes. No need of any extra preparation if you are thorough with basic concepts in DSD and DECA.
1) Prepare your Resume properly. I was asked about each and every project that I had mentioned in my Resume. If you fumble about anything on your resume, it will dampen your prospects of moving forward.
2) For internship selection, there will be 1 technical interview round and 1 HR round whereas for Fresh grads selection : there will be 2 technical interview rounds and 1 HR round
The overall recruitment procedure was Exhausting. It lasted for an entire day.
Skills:
College Name: NIT Surathkal
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Qualcomm Interviews By Designations
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Qualcomm Associate Engineer Interview Process
based on 6 interviews
4 Interview rounds
- Technical Round
- HR Round
- Aptitude Test Round - 1
- Aptitude Test Round - 2
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