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      Engineer Interview

      28 Feb 2019
      Anonymous employee
      Hyderābād
      Accepted offer
      Positive experience
      Average interview

      Application

      I applied through an employee referral. The process took 4 weeks. I interviewed at Qualcomm (Hyderābād) in Jan 2019

      Interview

      I applied for WLAN Firmware developer. To be called for interview I had to clear online coding test. Practicing hackerrank practice problems are enough for passing the test. OS and C concepts are mandatory for Interview. For WLAN basics of WiFi maybe needed. Description of projects in college or in previous industry. What problems you face and how did you solved them.

      Interview questions [23]

      Question 1

      C code for adding and deleting nodes in a linked list. Modify the same for circular linked list
      Answer question

      Question 2

      Differences between arrays and Linked Lists and point out their advantages and disadvantages
      Answer question

      Question 3

      There is a mod 60 hardware counter. It generates a overflow interrupt. I can access the count value register of the counter. Write a program to show the time in Hour Minute and Seconds to user.
      1 Answer

      Question 4

      Write a program to find out the number of digits in decimal representation of a user input no.
      1 Answer

      Question 5

      Let's suppose Modulus operation (%) is not supported by a system. Write a program to implement modulus operation
      Answer question

      Question 6

      Write a program to print a no in reverse in decimal format
      Answer question

      Question 7

      Reverse a string without using a temporary variable for swapping
      Answer question

      Question 8

      Demonstrate the use of function pointers
      Answer question

      Question 9

      Write a program to toggle an arbitrary bit of a number. Don't modify other bits
      Answer question

      Question 10

      Count no of set bits in a 32 bit number. Modify the prog so that the loop can't run more than no of set bits in that no.
      Answer question

      Question 11

      Find repeated characters in a string
      1 Answer

      Question 12

      Memory organisation in C
      1 Answer

      Question 13

      How Malloc() allocates memory from heap internally
      1 Answer

      Question 14

      How a task is preemptied when a interrupt comes. Where the status etc. of the task is stored.
      Answer question

      Question 15

      What are the different task queuing types in RTOS
      Answer question

      Question 16

      Interrupt handling in RTOS. How it is divided into Top half and Bottom half. What is the advantage
      Answer question

      Question 17

      What is use of Volatile variable in C.
      1 Answer

      Question 18

      What is priority inversion in OS, how it happens. How to avoid it.
      Answer question

      Question 19

      Static and extern type of variable in C. Where are they allocated. Scope and lifetime. Can we use them in another C file?
      Answer question

      Question 20

      sizeof(int), sizeof(int*), sizeof(int**), Write your own sizeof() function
      Answer question

      Question 21

      How much memory is actually allocated in malloc(0). Why it is non-zero. Why Malloc allocates more memory than asked for?
      Answer question

      Question 22

      Which one will behave how in which OS, which one crashes faster. Why? while(1) int *p = (int*)malloc(10); while(1){ int *p = (int*)malloc(10); memset(p, 1, 10); }
      Answer question

      Question 23

      WLAN frame exchange basics: How an AP associates with an STA
      1 Answer

      Other Engineer interview reviews for Qualcomm

      Engineer Interview

      11 May 2026
      Anonymous interview candidate
      Hyderābād
      No offer
      Neutral experience
      Average interview

      Application

      I interviewed at Qualcomm (Hyderābād)

      Interview

      three rounds of interview 1. dsa two qns from hacker rank (1 easy and 1 medium) and projects 2. dsa 1 qn (medium) and a api read and manipulate qns from hacker rank i got rejected in 2nd round

      Engineer Interview

      9 Feb 2026
      Anonymous interview candidate
      Cork
      Declined offer
      Positive experience
      Average interview

      Application

      I applied through an employee referral. I interviewed at Qualcomm (Cork)

      Interview

      HR & Technical, pretty standard. There was a few coding questions, and the interviewer was helpful and they were trying to help clarify the questions. HR was helpful and made a lot of customizations for me

      Interview questions [1]

      Question 1

      Some coding question in C++
      Answer question

      Engineer Interview

      6 Feb 2026
      Anonymous employee
      Bengaluru
      Accepted offer
      Positive experience
      Average interview

      Application

      I interviewed at Qualcomm (Bengaluru)

      Interview

      ScreenTest 3 Technical Rounds OS, DP, LinkedList, Bit Manipulation and string coding questions. Semaphores, mutexes, OSI layers etc. Applied via LinkedIN. Went through past interview questions. Bit Manipulation and memory management is important.

      Interview questions [1]

      Question 1

      ScreenTest 3 Technical Rounds OS, DP, LinkedList, Bit Manipulation and string coding questions. Semaphores, mutexes, OSI layers etc.
      Answer question

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