Ola Electric Mobility Interview Questions, Process, and Tips

Basic Logical & Reasoning based questions

Q1. What is BMS, what are the basic components of a BMS.
Ans. 
BMS stands for Battery Management System. It is a system that manages and monitors the performance of a battery.
• Basic components of a BMS include battery monitoring unit, battery control unit, and battery charger.

• Battery monitoring unit measures voltage, current, temperature, and state of charge of the battery.

• Battery control unit manages the charging and discharging of the battery to optimize performance.

• Battery charg...read more
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Q2. What is MCU & Motor, basic structure of MCU & Motor
Ans. 
MCU stands for Microcontroller Unit and Motor is a device that converts electrical energy into mechanical energy.
• MCU is a small computer on a single integrated circuit used to control other devices.

• Motor is a machine that converts electrical energy into mechanical energy.

• Basic structure of MCU includes CPU, memory, input/output ports, timers, etc.

• Basic structure of Motor includes stator, rotor, bearings, and shaft.

• Exam...read more
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Q3. What do you understand by Contol Panel
Ans. 
A control panel is a device or interface used to control and monitor various systems or equipment.
• A control panel typically consists of buttons, switches, dials, and indicators for user interaction.

• It is commonly used in industrial settings to control machinery or processes.

• Control panels can also be found in consumer electronics, such as microwave ovens or washing machines.

• They are often designed to be user-friendly a
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Q4. Difference between LFP & NMC
Ans. 
LFP is Lithium Iron Phosphate and NMC is Lithium Nickel Manganese Cobalt Oxide. Both are types of lithium-ion battery chemistries.
• LFP (Lithium Iron Phosphate) is known for its high thermal and chemical stability, making it safer than other lithium-ion chemistries.

• NMC (Lithium Nickel Manganese Cobalt Oxide) offers higher energy density and longer lifespan compared to LFP.

• NMC batteries are commonly used in electric vehic...read more
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Q5. What is thermistor, diode, what's the difference between unidirectional & bi directional elements.
Ans. 
A thermistor is a type of resistor whose resistance changes significantly with temperature, while a diode is a semiconductor device that allows current to flow in one direction only.
• Thermistor: resistor with temperature-dependent resistance (ex. NTC thermistor)

• Diode: semiconductor device allowing current flow in one direction (ex. silicon diode)

• Unidirectional element: allows current flow in one direction only (ex. diod...read more
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Q1. What is the ev scotar
Ans. 
The EV Scotar is a type of electric vehicle charging station.
• EV Scotar is a popular brand of electric vehicle charging stations.

• It is known for its fast charging capabilities and user-friendly interface.

• EV Scotar stations can be found in various locations such as parking lots, shopping centers, and highways.
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Q2. Ev scotar is the electrical vechile, the scotar not for use petrol only for charging system, and high speed scotor
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Check if a tree id symmetric
check if a string contains valid parenthesis matching

Q1. High level system design of Book My show
Ans. 
Book My Show is a high-level system for booking movie tickets and event tickets online.
• Users can search for movies or events, view showtimes, and book tickets online.

• The system should handle user authentication, payment processing, and ticket confirmation.

• It should also include features like seat selection, seat availability updates, and booking history.

• The system should have a database to store movie/event information
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Q2. Scalability related questions
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Q1. Past project discussion
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Q2. Talk about the most challenging technical feature you implemented
Ans. 
Implemented a real-time collaborative editing feature using WebSockets
• Designed a scalable architecture to handle concurrent edits from multiple users

• Implemented conflict resolution algorithms to ensure data consistency

• Utilized WebSockets for bi-directional communication between clients and server
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Q1. What is the difference between other cars and Ola and the benefits of taking Ola
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