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

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

Concurrency is managing multiple tasks at once, while parallelism is executing multiple tasks simultaneously.

• Concurrency involves multiple tasks making progress, but not necessarily at the same time. Example: A web server handling multiple requests.

• Parallelism is about executing multiple tasks simultaneously, often on multiple processors. Example: A program performing calculations on large datasets using multiple ...read more

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.

Insertion in a doubly linked list involves adding nodes with pointers to both previous and next nodes for bidirectional traversal.

• A doubly linked list node contains three parts: data, a pointer to the next node, and a pointer to the previous node.

• To insert at the beginning, adjust the head pointer and update the new node's next and previous pointers.

• To insert at the end, traverse to the last node, update its next ...read more

Count set bits in a number using C programming language.

• Use bitwise AND operation with 1 to check if the rightmost bit is set.

• Shift the number to the right by 1 bit each time to check all bits.

• Repeat the process until the number becomes 0, counting the set bits each time.