Hevo Data Sdet Engineer Interview Questions and Answers

Q1. What is ACID Prop?
Ans. 
ACID Prop stands for Atomicity, Consistency, Isolation, Durability properties in database transactions.
• Atomicity ensures that all operations in a transaction are completed successfully or none at all.

• Consistency ensures that the database remains in a consistent state before and after the transaction.

• Isolation ensures that multiple transactions can be executed concurrently without affecting each other.

• Durability ensures...read more
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Q2. WHAT IS ER Dia?
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ER Dia stands for Entity-Relationship Diagram, a visual representation of entities and their relationships in a database.
• ER Dia is used to design databases by showing the entities (such as customers, products, orders) and the relationships between them.

• Entities are represented as rectangles, relationships as diamonds, and attributes as ovals.

• For example, in a library database, you may have entities like 'Book', 'Author...read more
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Q1. PMSM motor control
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Q2. DC DC converter
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Q1. What is State of charge?
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State of charge refers to the amount of energy remaining in a battery compared to its full capacity.
• State of charge is usually expressed as a percentage.

• It is important for determining how much power is available in a battery.

• State of charge can be monitored using battery management systems.

• Example: A battery with 50% state of charge means it is halfway depleted.
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Q1. Angular, js basic questions and they ask you to open code snippet and ask js basic and DS questions
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30 Questions Of Aptitude regarding Logical thinking etc

2 Coding Questions regarding Programming in C language

Q1. Questions based on projects worked and skills mentioned in resume
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Q1. Questions on Projects worked and skills mentioned and some company questions.
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Q1. Previous project and role?
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Q2. What is KWP2000 or UDS use for?
Ans. 
KWP2000 and UDS are communication protocols used in automotive diagnostics.
• KWP2000 is used for diagnostics and flashing of electronic control units (ECUs) in older vehicles.

• UDS (Unified Diagnostic Services) is a modern protocol used for diagnostics and flashing of ECUs in newer vehicles.

• Both protocols allow for communication between a diagnostic tool and the vehicle's ECUs to read and clear fault codes, perform tests, ...read more
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Q3. How many type of ECU are there?
Ans. 
There are mainly three types of ECUs: Engine Control Unit (ECU), Transmission Control Unit (TCU), and Body Control Module (BCM).
• Engine Control Unit (ECU) - controls the engine functions such as fuel injection, ignition timing, and emissions.

• Transmission Control Unit (TCU) - manages the transmission system, including gear shifting and torque converter lockup.

• Body Control Module (BCM) - oversees various body functions li...read more
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Q4. What is online and offline in CANoe?
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Online and offline in CANoe refer to the modes of communication with the CAN bus.
• Online mode allows real-time interaction with the CAN bus, sending and receiving messages.

• Offline mode allows analysis of previously recorded CAN bus data without real-time interaction.

• Online mode is used for testing and debugging live systems, while offline mode is used for post-analysis and simulation.

• Examples: Online mode is used to mon...read more
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Q1. Same as round one question?
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Q1. Salary expectations?
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Q1. Regarding BMS and system engineering activities
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Q2. System engineer process and tools
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Q1. System engineer role and responsibilities
Ans. 
System engineers design and manage complex systems to ensure they operate efficiently and effectively.
• Designing and implementing computer systems

• Managing system configurations and upgrades

• Troubleshooting system issues

• Collaborating with other IT professionals

• Ensuring system security and data integrity
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Q2. System engineer activity wrt BMS
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Q1. Salary related stuff and expectations
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Q2. Details regarding joining date and last working day
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Q1. What are Microcontroller
Ans. 
Microcontrollers are small computers on a single integrated circuit used to control electronic devices.
• Microcontrollers are often used in embedded systems for tasks like controlling sensors, motors, and displays.

• They typically have a CPU, memory, and input/output peripherals on a single chip.

• Examples of microcontrollers include Arduino, Raspberry Pi, and PIC microcontrollers.
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