Qualcomm Software Engineer Interview Questions and Answers

Merge multiple sorted arrays into a single sorted array efficiently.

• Use a min-heap to keep track of the smallest elements from each array.

• Extract the smallest element from the heap and add it to the result array.

• Insert the next element from the array of the extracted element into the heap.

• Repeat until all elements from all arrays are merged.

• Example: Merging [1, 4, 5], [1, 3, 4], [2, 6] results in [1, 1, 2, 3, 4, 4...read more

Implementing a memory-safe stack in C using dynamic memory allocation and proper error handling.

• Use dynamic memory allocation (malloc) for stack storage.

• Implement push and pop functions with error checking.

• Ensure to free allocated memory to prevent leaks.

• Use a struct to encapsulate stack properties (size, capacity).

• Check for stack underflow and overflow conditions.

I have worked on various software projects, focusing on web development, mobile apps, and data analysis tools.

• Developed a responsive e-commerce website using React and Node.js, improving user engagement by 30%.

• Created a mobile app for tracking fitness goals, which gained 5,000 downloads in the first month.

• Built a data visualization tool using Python and D3.js to help stakeholders understand complex datasets.

Microprocessors are general-purpose CPUs, while microcontrollers integrate CPU, memory, and peripherals for specific tasks.

• Microprocessors are designed for complex computations and run operating systems (e.g., Intel Core i7).

• Microcontrollers are optimized for specific control tasks and often used in embedded systems (e.g., Arduino, PIC).

• Microprocessors typically require external components like RAM and storage, wh...read more

Detect endianness using C program

• Use a union to create a variable with a known value

• Check the value of the first byte to determine endianness

• Big endian systems store the most significant byte first

• Little endian systems store the least significant byte first

• Example: union { int i; char c; } u; u.i = 1; if (u.c == 1) { /* Little endian */ } else { /* Big endian */ }

Union is a data structure that allows storing different data types in the same memory location, while structure is a data structure that allows storing different data types in a single unit.

• Union uses the same memory location for all its members, while structure allocates separate memory for each member.

• In a union, only one member can be accessed at a time, while in a structure, all members can be accessed simulta...read more