Qualcomm Interview Questions and Answers

Function to dynamically allocate memory and write data to a memory location, returning the address details.

• Use malloc() or calloc() to dynamically allocate memory

• Use memcpy() or strcpy() to write data to the allocated memory

• Return the address details where data is present

Memory management involves allocating and deallocating memory efficiently, while mapping involves associating memory addresses with physical locations.

• Memory management is crucial for optimizing performance and preventing memory leaks.

• Mapping involves translating virtual memory addresses to physical memory locations.

• Different scenarios may require different memory management strategies, such as stack allocation vs heap...read more

Program to find length of bits assigned in memory using recursion.

• Define a recursive function to count the bits in memory

• Base case: if input is 0, return 0

• Recursive case: return 1 + function(input / 2)

Volatile keyword prevents compiler optimization by telling the compiler that the variable's value can change unexpectedly.

• Volatile keyword is used to indicate that a variable may be changed unexpectedly, such as in the case of hardware registers.

• When initializing GPIO pins, using volatile keyword ensures that the compiler does not optimize away the initialization code.

• Without volatile keyword, the compiler may optimize...read more

Unions in C/C++ can be used for bit assignments by allowing multiple variables to share the same memory location.

• Unions allow different data types to be stored in the same memory location, which can be useful for bit manipulation.

• By defining a union with multiple variables of different data types, you can access the same memory location using different variable names.

• For example, you can use a union to access individua...read more

static const is used to declare constants that are known at compile time and cannot be modified

• static const int MAX_SIZE = 100; // declaring a constant integer

• static const double PI = 3.14159; // declaring a constant double

• static const char* MESSAGE = "Hello, World!"; // declaring a constant string

Program to find the sum of all the digits in a number.

• Iterate through each digit in the number and add them together.

• Convert the number to a string to easily access each digit.

• Use modulo operator to extract each digit from the number.

• Handle negative numbers by taking the absolute value before processing.

Check if a linked list is circular, if not reverse it.

• Create two pointers, one moving at double the speed of the other to detect a cycle

• If a cycle is detected, the list is circular. If not, reverse the list by changing the pointers' directions

Architecture to process real-time data involves designing systems that can efficiently collect, process, and analyze data in real-time.

• Utilize distributed systems to handle high volumes of data in real-time

• Implement stream processing frameworks like Apache Kafka or Apache Flink

• Use microservices architecture for scalability and flexibility

• Employ in-memory databases for fast data retrieval

• Ensure fault tolerance and data ...read more

Various data filtering techniques include sorting, grouping, aggregating, and applying filters based on specific criteria.

• Sorting: arranging data in a specific order, such as ascending or descending

• Grouping: categorizing data into distinct groups based on common attributes

• Aggregating: combining multiple data points into a single value, such as summing or averaging

• Filtering: selecting only the data that meets certain cr...read more

Initialize and control GPIO using HAL functions in embedded systems.

• Use HAL_GPIO_Init() function to initialize GPIO pins

• Use HAL_GPIO_WritePin() function to set or clear GPIO status

• Example: HAL_GPIO_Init(&GPIO_InitStruct)

• Example: HAL_GPIO_WritePin(GPIOx, GPIO_PIN_x, GPIO_PIN_SET)

Traverse a linked list based on input 0 or 1 to return decimal equivalent.

• Create a function that takes input 0 or 1 and traverses the linked list accordingly.

• For each node in the linked list, multiply the current decimal value by 2 and add the data of the node if input is 1.

• Return the final decimal value after traversing the linked list.

I have over 5 years of experience as a Business Analyst in the finance industry.

• Led cross-functional teams to analyze market trends and develop strategic plans

• Performed data analysis to identify opportunities for cost reduction and revenue growth

• Collaborated with stakeholders to gather requirements and create detailed business requirements documents

Business Analyst responsibilities include analyzing data, identifying trends, and making recommendations to improve business processes.

• Gather and analyze data to identify trends and make recommendations

• Work closely with stakeholders to understand business needs and requirements

• Create reports and presentations to communicate findings and recommendations

• Collaborate with cross-functional teams to implement solutions

• Monito...read more

Linux boot process involves several stages including BIOS, bootloader, kernel initialization, and user space initialization.

• BIOS (Basic Input/Output System) performs hardware initialization and loads bootloader

• Bootloader (GRUB, LILO) loads the Linux kernel into memory and starts it

• Kernel initializes devices, mounts the root filesystem, and starts the init process

• Init process (systemd, SysVinit) starts user space proces...read more

Planning is the process of setting goals, determining actions to achieve those goals, and allocating resources effectively.

• Setting specific, measurable, achievable, relevant, and time-bound (SMART) goals

• Creating a detailed plan of action to achieve the goals

• Allocating resources such as time, money, and manpower efficiently

• Monitoring progress and making adjustments as needed

• Examples: Financial planning for a company's b...read more

A financial model is built to forecast future financial performance of a company or project.

• Identify the purpose of the financial model (e.g. budgeting, valuation, forecasting)

• Gather historical financial data and relevant assumptions

• Create income statement, balance sheet, and cash flow statement projections

• Perform sensitivity analysis to assess the impact of different variables

• Validate the model by comparing actual res...read more

Depreciation is the allocation of the cost of a tangible asset over its useful life.

• Depreciation is a non-cash expense that reduces the value of an asset over time.

• It reflects the wear and tear, obsolescence, or decrease in value of an asset.

• Common methods of calculating depreciation include straight-line, double declining balance, and units of production.

• Example: A company purchases a machine for $10,000 with a useful...read more

Budgeting is the process of creating a plan to manage income and expenses over a specific period of time.

• Budgeting involves setting financial goals and creating a detailed plan to achieve them.

• It helps in tracking income, expenses, and savings to ensure financial stability.

• Budgeting can be done on a personal level, for businesses, or for specific projects.

• Examples of budgeting tools include spreadsheets, budgeting apps...read more