1. Tell me about yourself.

A good answer includes your academic background, technical skills, relevant projects, and a short statement about your passion for Qualcomm or embedded/software systems.

2. What do you know about Qualcomm? Why do you want to work here?

Qualcomm is a global leader in semiconductors, 5G, and wireless technologies. I admire its innovation culture and products like Snapdragon processors and modem chips, and I want to be part of cutting-edge technologies shaping the future.

3. Explain your final year project / internship project.

Be prepared to explain the objective, technologies used, what you implemented, challenges you faced, and how you solved them. Use real diagrams if needed.

4. What are pointers in C? Can you explain with an example?

Pointers are variables that store memory addresses. For example, int *p = &x; stores the address of variable x. They're used in dynamic memory, arrays, and function arguments.

5. Write code to reverse a linked list / implement LRU cache.

Expect coding questions on data structures. Practice problems like reversing a list, detecting loops, or designing an LRU cache using linked list + hashmap.

6. What is the difference between microprocessor and microcontroller?

A microprocessor is CPU-only (used in PCs), while a microcontroller has CPU + memory + peripherals in one chip, ideal for embedded systems.

7. Explain the OSI model and how data flows through it.

The OSI model has 7 layers: Application, Presentation, Session, Transport, Network, Data Link, and Physical. Data flows top-down when sending, and bottom-up when receiving.

8. What is virtual memory? How does paging work?

Virtual memory allows programs to use more memory than physically available by using the hard disk. Paging divides memory into fixed-size pages stored in RAM or disk as needed.

9. What is Verilog? Write a simple module.

module mux2to1(input a, b, sel, output y);
  assign y = sel ? b : a;
endmodule

10. Tell us about a time you failed or had a team conflict.

Describe a real scenario, what went wrong, how you took responsibility, and what you learned. Emphasize communication, teamwork, and personal growth.

1. Tell me about yourself.

A good answer includes your academic background, technical skills, relevant projects, and a short statement about your passion for Qualcomm or embedded/software systems.

2. What is CUDA and how does it relate to NVIDIA GPUs?

CUDA is NVIDIA's parallel computing platform that allows developers to use GPU for general purpose processing. It enables massive parallelism using thousands of GPU cores.

3. Explain your final year project / internship project.

Be prepared to explain the objective, technologies used, what you implemented, challenges you faced, and how you solved them. Use real diagrams if needed.

4. What are pointers in C? Can you explain with an example?

Pointers are variables that store memory addresses. For example, int *p = &x;

5. Write code to reverse a linked list / implement LRU cache.

Expect coding questions on data structures. Practice problems like reversing a list, detecting loops, or designing an LRU cache using linked list + hashmap.

6. What is the difference between microprocessor and microcontroller?

A microprocessor is CPU-only, while a microcontroller includes CPU + memory + peripherals.

7. Explain the OSI model and how data flows through it.

The OSI model has 7 layers. Data goes top to bottom when sent, and bottom to top when received.

8. What is virtual memory? How does paging work?

Virtual memory allows large memory usage by mapping disk to RAM using pages.

9. What is Verilog? Write a simple module.

module mux2to1(input a, b, sel, output y);
  assign y = sel ? b : a;
endmodule

10. Tell us about a time you failed or had a team conflict.

Share a true situation and highlight problem-solving and teamwork.

1. Tell me about yourself.

A good answer should include your name, educational background, core technical skills, relevant projects or internships, and your interest in working at BEL. Keep it structured, confident, and relevant to the job role.

2. What is the difference between microprocessor and microcontroller?

A microprocessor is a CPU-only chip used in general-purpose computing like PCs. A microcontroller integrates CPU, memory, and I/O peripherals in a single chip and is ideal for embedded systems.

3. Explain the working of a Phase Locked Loop (PLL).

A PLL is a control system that synchronizes an output signal’s phase and frequency with a reference signal. It includes a phase detector, low-pass filter, and voltage-controlled oscillator (VCO).

4. How does RADAR work and what are its applications?

RADAR transmits radio waves that reflect off objects. The receiver detects the echo and measures distance and speed. Applications include weather tracking, military defense, and air traffic control.

5. What is modulation and why is it used in communication systems?

Modulation is the process of varying a carrier wave to transmit data. It's used to reduce antenna size, minimize interference, and allow multiple signals over the same channel.

6. Draw and explain the block diagram of an 8085 microprocessor.

The 8085 block diagram includes ALU, registers (A, B, C, D, E, H, L), program counter, stack pointer, control unit, and buses. It fetches, decodes, and executes instructions sequentially.

7. Difference between analog and digital signals with examples.

Analog signals are continuous (e.g., temperature, sound), while digital signals are discrete (e.g., binary data in computers). Analog: sine wave; Digital: square wave.

8. Explain Nyquist theorem and its significance.

The Nyquist theorem states that the sampling rate must be at least twice the highest frequency of the signal to avoid aliasing. It is key in digital signal processing.

9. How does an op-amp work in inverting and non-inverting mode?

In inverting mode, input is given to the negative terminal, and the output is inverted. In non-inverting mode, input goes to the positive terminal, and the output is in phase with input.

10. Explain the working of a basic transmitter and receiver.

A transmitter modulates and sends the signal via antenna; the receiver captures, demodulates, amplifies, and processes the signal to retrieve the original data.

1. What is the difference between a microprocessor and a microcontroller?

A microprocessor is CPU-only and needs external memory and peripherals. A microcontroller integrates CPU, memory, I/O ports, and timers on a single chip, making it ideal for embedded systems.

2. Explain the working of a Phase-Locked Loop (PLL).

A PLL locks the phase of a voltage-controlled oscillator (VCO) to the phase of an input signal. It is widely used in frequency synthesis, clock generation, and demodulation.

3. What is modulation? Why is it necessary?

Modulation is the process of varying a carrier signal to transmit information. It is necessary to reduce antenna size, avoid interference, and increase signal range.

4. What are the differences between Analog and Digital signals?

Analog signals are continuous and variable, while digital signals are discrete and represented by 0s and 1s. Digital signals are more noise-resistant and easier to store and transmit.

5. What is the function of a multiplexer?

A multiplexer (MUX) selects one input from many and forwards it to a single output. It’s commonly used in data routing and communication systems.

6. What is the use of a Schmitt Trigger?

A Schmitt Trigger converts a noisy analog signal into a clean digital signal using hysteresis, preventing multiple transitions due to input noise.

7. Explain the working principle of an Op-Amp in inverting mode.

In inverting mode, the input is applied to the inverting terminal and the non-inverting terminal is grounded. The gain is -Rf/Rin, producing an output 180° out of phase with the input.

8. What are the types of ADCs and which one is the fastest?

Types include Flash, Successive Approximation, Dual Slope, and Sigma-Delta ADCs. Flash ADC is the fastest and is used in high-speed applications.

9. What is the difference between RAM and ROM?

RAM is volatile memory used for temporary data storage during execution, while ROM is non-volatile memory used to store permanent instructions or firmware.

10. What is the role of a filter in signal processing?

A filter selectively passes or blocks certain frequency components of a signal. Types include low-pass, high-pass, band-pass, and band-stop filters.