VVD & Sons Embedded Software Engineer Interview Questions and Answers

Q1. Print the largest string from the given 5 strings
Ans. 
Find the largest string from a given array of 5 strings
• Iterate through the array of strings and compare the length of each string

• Keep track of the largest string found so far

• Return the largest string at the end
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Q2. Check if the required dropdown option is displayed or not
Ans. 
Use Selenium WebDriver to locate the dropdown element and check if the required option is displayed
• Locate the dropdown element using Selenium WebDriver

• Use the Select class to interact with the dropdown

• Verify if the required option is displayed using isSelected() method
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Basic coding questions that are available with just one google search

Standard DSA problems

Q1. Java questions, DBs
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Q1. Culture fit for startup
Ans. 
Culture fit for a startup is crucial for success.
• Startup culture is often fast-paced and dynamic.

• Employees need to be adaptable and willing to take on multiple roles.

• Collaboration and teamwork are highly valued.

• Innovation and creativity are encouraged.

• Open communication and transparency are important.

• A strong work ethic and dedication are necessary.

• Risk-taking and learning from failures are embraced.

• Passion and drive f
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Q1. Leadership qualities in the current role
Ans. 
Demonstrated leadership qualities in current role
• Led a team of 5 developers to successfully complete a project ahead of schedule

• Took initiative to organize weekly team meetings to discuss progress and address any challenges

• Mentored junior team members, providing guidance and support to help them improve their skills

• Collaborated with cross-functional teams to ensure smooth coordination and effective communication

• Took ow...read more
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Q1. Find the middle element whose left and right sum is equal
Ans. 
Iterate through array to find middle element with equal left and right sum
• Iterate through array and calculate sum of elements on left and right of each element

• Return element if left sum equals right sum

• Handle edge cases like array with less than 3 elements
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Basic questions on maths related parts and analysis skills

Coding questions from various Data Structure parts like linkedList stack queue

There were few verbal questions, many questions on electronics basics(op amps, network analysis), embedded c, few general aptitudes questions. Overall it was moderately difficult. EEE and ECE had technical questions under two categories i.e. electrical and electronics . Based on each categories students were shortlisted under firmware and hardware.

Group discussion was good. The topic our group got was "Is India ready for electrical vehicles". There were about 10 students in one group.

Q1. Tell me about yourself ?
Ans. 
I am a firmware engineer with experience in developing embedded systems and writing low-level code.
• I have a strong background in C and C++ programming languages.

• I have worked on various microcontrollers and embedded platforms such as Arduino, Raspberry Pi, and STM32.

• I am experienced in developing device drivers, communication protocols, and firmware for IoT devices.

• I have a good understanding of hardware-software inter...read more
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Q2. Questions on projects
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Q3. Difference between diode and Zener diode
Ans. 
A diode is a two-terminal electronic component that allows current to flow in one direction, while a Zener diode is a special type of diode that allows current to flow in reverse direction when a certain voltage is reached.
• Diodes are used for rectification, signal demodulation, and voltage regulation.

• Zener diodes are used for voltage regulation and protection against voltage spikes.

• Diodes have a forward voltage drop, w...read more
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Q4. Draw bjt and mosfet model
Ans. 
BJT and MOSFET are models used to represent transistors in electronic circuits.
• BJT stands for Bipolar Junction Transistor and has three regions: emitter, base, and collector.

• MOSFET stands for Metal Oxide Semiconductor Field Effect Transistor and has three terminals: source, gate, and drain.

• BJT is a current-controlled device while MOSFET is a voltage-controlled device.

• BJT has a low input impedance while MOSFET has a hig...read more
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Q5. Different communication protocols
Ans. 
Communication protocols are sets of rules that govern the exchange of data between devices.
• Some common communication protocols include UART, SPI, I2C, CAN, Ethernet, and USB.

• Each protocol has its own advantages and disadvantages, and is suited for different types of applications.

• For example, UART is a simple protocol commonly used for serial communication between microcontrollers and sensors, while Ethernet is a more c...read more
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Q6. Questions on RAM and ROM
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