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Qualcomm Staff Engineer Interview Questions and Answers

Updated 11 Nov 2024

Qualcomm Staff Engineer Interview Experiences

4 interviews found

Staff Engineer Interview Questions & Answers

user image sachinkumar butte

posted on 20 Jun 2024

Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - One-on-one 

(1 Question)

  • Q1. C coding round. Reverse the linked list, bit manipulation.
Round 2 - One-on-one 

(2 Questions)

  • Q1. Regarding projects. Windows device driver architecture
  • Q2. KMDF and WDF driver
Round 3 - One-on-one 

(1 Question)

  • Q1. Managerial round questions
Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Naukri.com and was interviewed in Oct 2024. There were 2 interview rounds.

Round 1 - Coding Test 

Coding round coding round coding round

Round 2 - HR 

(2 Questions)

  • Q1. How are you doing
  • Q2. What is your name

Staff Engineer Interview Questions Asked at Other Companies

Q1. Swap Adjacent Bit Pairs Problem Statement Given an integer N, you ... read more
Q2. Search In Rotated Sorted Array Problem Statement Given a rotated ... read more
Q3. Minimum Jumps Problem Statement Bob and his wife are in the famou ... read more
Q4. Level Order Traversal of Binary Tree Given a Binary Tree of integ ... read more
asked in Nagarro
Q5. How to write HTML code considering web accessibility for disabled ... read more
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. How do you clock domain cross a signal where source and destination clock can are in the ratio 1:1 , 1:2, 2:1. Same circuit should work for all three.
  • Ans. 

    To clock domain cross a signal with different clock ratios, use a synchronizer circuit with multiple stages.

    • Implement a synchronizer circuit with multiple flip-flops to synchronize the signal between different clock domains.

    • Use a gray code or other encoding techniques to handle the different clock ratios.

    • Ensure proper setup and hold times are met for reliable data transfer.

    • Consider using FIFOs or handshaking protocols ...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Good technical depth needed.
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected Selected

I applied via Referral and was interviewed before Feb 2023. There were 2 interview rounds.

Round 1 - Group Discussion 

PMIC Charger Validation and integration

Round 2 - One-on-one 

(2 Questions)

  • Q1. Tell me about your work experience
  • Q2. Deep dive on Buck converter

Qualcomm interview questions for designations

 Senior Staff Engineer

 (1)

 Member Technical Staff

 (1)

 Software Engineer

 (37)

 Embedded Engineer

 (4)

 System Engineer

 (4)

 Test Engineer

 (3)

 Lead Engineer

 (3)

 Validation Engineer

 (1)

Staff Engineer Jobs at Qualcomm

View all

Interview questions from similar companies

Software Engineer Interview Questions & Answers

Intel user image Niranjhana Narayanan

posted on 4 Dec 2016

I applied via Campus Placement and was interviewed in Dec 2016. There were 5 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. Why UDP and not TCP in project
  • Ans. 

    UDP is preferred over TCP in this project due to its low latency and lightweight nature.

    • UDP is a connectionless protocol, which means it does not establish a direct connection between the sender and receiver.

    • UDP is faster than TCP as it does not have the overhead of establishing and maintaining a connection.

    • UDP is suitable for applications where real-time data transmission is crucial, such as video streaming or online ...

  • Answered by AI
  • Q2. How would you clear the 7th bit in a 32 bit register
  • Ans. 

    To clear the 7th bit in a 32-bit register, perform a bitwise AND operation with a mask that has all bits set to 1 except the 7th bit.

    • Create a mask with the 7th bit set to 0 and all other bits set to 1

    • Perform a bitwise AND operation between the register and the mask

    • Store the result back in the register

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience: Questions were based on C concepts, given piece of code, find error, output, etc then data structures, bit manipulation, a few aptitude questions were also there (around 5-7).
Tips: Practice aptitude, C, data structures (geeksforgeeks.org is a good source).
Duration: 1 hour
Total Questions: 30

Round: Technical + HR Interview
Experience: I was asked to explain project in detail, I had done projects on embedded, so was asked about that, details like what fields did you use in that structure, why this implementation and not some related other. Memory management, network communications, operating systems. Then questions on C concepts like memory allocation, function pointers, then data structures like linked lists, then bit manipulation in registers. Questions from electrical coursework. Then later, why higher studies, would you still go for higher studies if you had a good job at a company, why etc.
Tips: Be thorough with C (know your Kernighan & Ritchie) and be prepared to go into details about your projects.

Skills: C, Data Structures, Coursework Understanding, Project And Internship
College Name: IIT Madras

Skills evaluated in this interview

I appeared for an interview in Nov 2016.

Interview Questionnaire 

8 Questions

  • Q1. A random number will be given as input to system,write a program to detect its data type(int or float ) without using size of function
  • Q2. General hr questions
  • Q3. Once again general hr interview questions
  • Q4. 1.given a large rectangle
  • Ans. 

    Need more context. What needs to be done with the large rectangle?

    • What are the dimensions of the rectangle?

    • Is it a 2D or 3D object?

    • What is the context of the problem?

    • Are there any constraints or limitations?

    • What tools or programming languages can be used?

  • Answered by AI
  • Q5. You will be given dimensions of a bigger rectangle and smaller rectangle,derive a formula to get how many smaller rectangles fit into the bigger rectangle
  • Ans. 

    Derive a formula to determine how many smaller rectangles fit into a bigger rectangle given their dimensions.

    • Calculate the number of times the smaller rectangle can fit into the bigger rectangle horizontally and vertically

    • Divide the width of the bigger rectangle by the width of the smaller rectangle to get the horizontal count

    • Divide the height of the bigger rectangle by the height of the smaller rectangle to get the ve...

  • Answered by AI
  • Q6. How many points are required to draw a rectangle
  • Ans. 

    At least 4 points are required to draw a rectangle.

    • A rectangle has 4 sides and 4 corners, so at least 4 points are needed to define those corners.

    • The points must be arranged in a specific order to form a closed shape with 4 sides.

    • Additional points can be used to add details or modify the shape of the rectangle.

    • The number of points required may vary depending on the software or tool used to draw the rectangle.

  • Answered by AI
  • Q7. What will be the new coordinates of a rectangle points if rectangle length and breadth is scaled and write a program to calculate the coordinates of corner points of scaled rectangle
  • Ans. 

    Answering how to calculate new coordinates of a scaled rectangle and providing a program for it.

    • To calculate new coordinates, multiply the original coordinates by the scaling factor

    • Scaling factor can be calculated by dividing the new length/breadth by the original length/breadth

    • Program can take input of original coordinates, scaling factor, and output new coordinates

    • Example: Original coordinates: (0,0), (0,5), (5,5), (...

  • Answered by AI
  • Q8. Lastly a puzzle: i dont remember the question

Interview Preparation Tips

Round: Test
Experience: The test had three sections:
1.aptitude:It was like any other aptitude test,all it takes is a bit of practice to crack all the questions
2.C programming:Basics of c were asked,outputs of some programs,u have to be thorough with concepts of c
3.Electronics:The company hired for both profiles: 1. PDK:software
and 2.Logic library:hardware,so this electronics section was also there,questions are mostly Network analysis,cmos logic,digital logic,vlsi etc
u should have good basics to get the electronics questions of course they are not very hard,but not too easy


Tips: practice aptitude,basics of c programming and also basics of electronics
Duration: 1 hour 30 minutes
Total Questions: 60

Round: Test
Experience: after 1st round i was shortlisted to this technical round,i was asked this question, i suggested that i will convert that number into a string and check whether string has a dot or not to check if it is float or int,the interviewer was not very impressed but was ok and asked few small questions and promoted me to next round

Tips: If u crack test with top marks,the technical rounds will be very easy,because the interviewers do not ask tough questions for people who cracked written test with high marks

Round: Technical Interview
Experience: tell me about yourself,strengths,weakness,three principles u follow in life,etc
Tips: This round depends on you,dont try to bluff something,they will know if u are bluffing,take a breath and speak up ur mind,be confident u can do it

Round: HR Interview
Experience: same questions,but this time less duration,not involving lengthy discussions, i think this round was just for double check

Round: HR Interview
Experience: After the hr round,only seven were shortlist,this interview round was very much easy and they checked my approach to the given problem,they were checking how well i am thinking adding complexities to the given problem
Tips: they did not check my programming ability,but just problem solving skills,so be good at aptitude,by practicing as much as you can

Round: Group Discussion
Experience: after technical interview,4 were shortlisted,so they went for gd round,it was general topic,which checks your general knowledge
Tips: Dont be nervous,just speak what ever you know,never mind language issues
Duration: 20 minutes

Skills: for pdk profile :programming
College Name: NIT Warangal

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?
  • Ans. 

    To determine if a point is inside or outside a rectangle, we check if the point's coordinates fall within the rectangle's boundaries.

    • Check if the point's x-coordinate is greater than the left edge of the rectangle

    • Check if the point's x-coordinate is less than the right edge of the rectangle

    • Check if the point's y-coordinate is greater than the top edge of the rectangle

    • Check if the point's y-coordinate is less than the b...

  • Answered by AI
  • 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?
  • Ans. 

    To find line that divides rectangle into 2 equal halves through a point inside it.

    • Find the center of the rectangle

    • Draw a line from the center to the given point

    • Extend the line to the opposite side of the rectangle

    • The extended line will divide the rectangle into 2 equal halves

  • Answered by AI
  • 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,...
  • 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

I appeared for an interview in Feb 2017.

Interview Questionnaire 

7 Questions

  • Q1. What is a malloc function and where is it used and how is it different from new?
  • Ans. 

    malloc is a function in C that dynamically allocates memory on the heap. It is used to allocate memory for variables or data structures.

    • malloc is used in C programming language.

    • It is used to allocate memory on the heap.

    • malloc is different from 'new' in C++ as it does not call constructors for objects.

  • Answered by AI
  • Q2. What is the difference between C++ and Objective C and where will you use it?
  • Ans. 

    C++ is a general-purpose programming language while Objective C is a superset of C used for iOS and macOS development.

    • C++ is widely used for developing applications, games, and system software.

    • Objective C is mainly used for iOS and macOS development.

    • C++ supports both procedural and object-oriented programming paradigms.

    • Objective C is an object-oriented language with dynamic runtime features.

    • C++ has a larger community a...

  • Answered by AI
  • Q3. What is the difference between class container and class composition?
  • Ans. 

    Class container is a class that holds objects of other classes, while class composition is a way to combine multiple classes to create a new class.

    • Class container holds objects of other classes, acting as a collection or container.

    • Class composition combines multiple classes to create a new class with its own behavior and attributes.

    • In class container, the objects are typically stored in a data structure like an array o...

  • Answered by AI
  • Q4. There are fifteen horses and a racing track that can run five horses at a time. You have to figure out the top 3 horses out of those and you don't have any timer machine to measure. How will you find the t...
  • Ans. 

    Divide the horses into groups of 5 and race them. Take the top 2 from each race and race them again. Finally, race the top 2 horses to determine the top 3.

    • Divide the horses into 3 groups of 5 and race them.

    • Take the top 2 horses from each race and race them again.

    • Finally, race the top 2 horses to determine the top 3.

  • Answered by AI
  • Q5. What is the most difficult problem that you have solved (during work) till now and why you think you could do so?
  • Ans. 

    Developing a real-time data processing system for a high-traffic e-commerce website

    • Implemented a distributed system architecture to handle large volumes of data

    • Optimized algorithms for efficient data processing and storage

    • Utilized caching mechanisms to improve system performance

    • Worked closely with cross-functional teams to troubleshoot and resolve issues

    • Example: Successfully reduced data processing time by 50% by imple

  • Answered by AI
  • Q6. Why you want to change your current job?
  • Ans. 

    Seeking new challenges and opportunities for growth.

    • Looking for a more challenging role to further develop my skills

    • Interested in exploring new technologies and industries

    • Seeking better career advancement opportunities

    • Want to work in a more collaborative team environment

  • Answered by AI
  • Q7. What is the width of a tree? How will you calculate the width of the tree?
  • Ans. 

    The width of a tree is the maximum number of nodes at any level in the tree.

    • To calculate the width of a tree, we can perform a level order traversal and keep track of the maximum number of nodes at any level.

    • We can use a queue data structure to perform the level order traversal.

    • At each level, we count the number of nodes in the queue and update the maximum width if necessary.

  • Answered by AI

Interview Preparation Tips

Skills: Basic C/C++, Implementing Data Structures In C++

Skills evaluated in this interview

I applied via Campus Placement and was interviewed in Dec 2016. There was 1 interview round.

Interview Questionnaire 

7 Questions

  • Q1. Phases of compiler
  • Ans. 

    Phases of compiler include lexical analysis, syntax analysis, semantic analysis, code generation, and optimization.

    • Lexical analysis: breaking down input into tokens

    • Syntax analysis: checking if tokens form valid syntax

    • Semantic analysis: checking if syntax is semantically correct

    • Code generation: generating machine code from input

    • Optimization: improving generated code performance

  • Answered by AI
  • Q2. Compiler optimisations
  • Q3. Why to c over cpp
  • Ans. 

    C is preferred over C++ for certain applications due to its simplicity and efficiency.

    • C is a simpler language compared to C++ and has a smaller runtime footprint.

    • C is often used for low-level programming, embedded systems, and operating systems.

    • C allows for more control over memory management and can be faster in certain scenarios.

    • C++ introduces additional features like object-oriented programming and templates, which

  • Answered by AI
  • Q4. Classes and structure and memory allocation for them
  • Ans. 

    Classes are blueprints for creating objects, while structures are similar but with different default access levels.

    • Classes and structures are used to define the structure and behavior of objects in object-oriented programming.

    • Classes are reference types and are allocated on the heap, while structures are value types and are allocated on the stack.

    • Memory allocation for classes is managed by garbage collection, while mem...

  • Answered by AI
  • Q5. My research area
  • Q6. My professional experience
  • Q7. Knowledge in cpp, c and debugging

Interview Preparation Tips

Round: Technical Interview
Experience: Asked about, basic cpp, c. compiler optimisations and phases, lex and yacc. why and how compiler optimisations help.
Tips: Its good.

Round: Technical Interview
Experience: How good am i in c, cpp. My research area.
Tips: Question where not clear to me. when asked how good are you in cpp, in debugging, in firmware I was not able to understand what the interviewer was looking for.

College Name: IIT Madras

Skills evaluated in this interview

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

Qualcomm Interview FAQs

How many rounds are there in Qualcomm Staff Engineer interview?
Qualcomm interview process usually has 2 rounds. The most common rounds in the Qualcomm interview process are One-on-one Round, Group Discussion and Coding Test.
How to prepare for Qualcomm Staff Engineer 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 Python, Staffing, C++, Computer science and Perl.
What are the top questions asked in Qualcomm Staff Engineer interview?

Some of the top questions asked at the Qualcomm Staff Engineer interview -

  1. How do you clock domain cross a signal where source and destination clock can a...read more
  2. C coding round. Reverse the linked list, bit manipulati...read more
  3. Regarding projects. Windows device driver architect...read more

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Qualcomm Staff Engineer Interview Process

based on 5 interviews

Interview experience

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Qualcomm Staff Engineer Salary
based on 392 salaries
₹24.5 L/yr - ₹80 L/yr
50% more than the average Staff Engineer Salary in India
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