Mahindra & Mahindra Interview Questions, Process, and Tips

45 mins 15 min mcq data science and 30 mins 1 dsa problem

Q1. Python - All subsets of a list.
Ans. 
Generate all possible subsets of a given list in Python.
• Use itertools.combinations to generate all possible combinations of the list elements.

• Convert the combinations to lists and store them in a new list to get all subsets.
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Q2. Sql query - Customers who have ordered all products from all categories.
Ans. 
Use a SQL query to find customers who have ordered all products from all categories.
• Join the Customers, Orders, and Products tables

• Group by customer and count the distinct products ordered

• Filter for customers who have ordered the total number of products available in each category
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Q3. Importance of feature engineering.
Ans. 
Feature engineering is crucial in data science as it involves selecting, transforming, and creating new features to improve model performance.
• Feature engineering helps in improving model accuracy by providing relevant and meaningful input variables.

• It involves techniques like one-hot encoding, scaling, normalization, and creating interaction terms.

• Feature engineering can help in reducing overfitting and improving model...read more
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Q4. Questions on project.
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Q5. What is GAN.Have you worked with it.
Ans. 
GAN stands for Generative Adversarial Network, a type of neural network used for generating new data.
• Consists of two neural networks - generator and discriminator

• Generator creates new data samples while discriminator tries to distinguish between real and generated data

• Used in image generation, text generation, and other creative applications
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Q1. Discussion on project.Demo of project.
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Q2. Analysis sql query - whether class 11 marks or class 12 marks is greater., table given which contains student name,class,11th marks,12th marks.
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Q3. Similar table. Find students who scored more than avg marks of both 11th and 12th.
Ans. 
Find students who scored more than avg marks in both 11th and 12th grades.
• Calculate the average marks for each student in 11th and 12th grades.

• Compare each student's marks with the respective average marks to find those who scored higher in both grades.
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Q4. What is Cost function.
Ans. 
Cost function is a mathematical function that measures the error between predicted values and actual values in a machine learning model.
• Cost function helps in optimizing the parameters of a model to minimize the error.

• Common cost functions include Mean Squared Error (MSE) and Cross Entropy Loss.

• It is used in training machine learning models through techniques like gradient descent.

• The goal is to find the parameters tha
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Q5. What is entropy.
Ans. 
Entropy is a measure of disorder or randomness in a system.
• Entropy is used in information theory to quantify the amount of uncertainty involved in predicting the value of a random variable.

• It is often used in machine learning to measure the impurity or disorder in a dataset.

• In thermodynamics, entropy is a measure of the amount of energy in a physical system that is not available to do work.
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Q6. What is ginni coefficient.
Ans. 
Gini coefficient is a measure of statistical dispersion intended to represent the income or wealth distribution of a nation's residents.
• Gini coefficient ranges from 0 to 1, where 0 represents perfect equality and 1 represents perfect inequality.

• A Gini coefficient of 0.4 is considered moderate inequality, while 0.6 or higher is considered high inequality.

• It is commonly used in economics to measure income inequality with...read more
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Q7. What will happen if linear regression is used for classification
Ans. 
Using linear regression for classification can lead to inaccurate predictions and unreliable results.
• Linear regression assumes a continuous output, making it unsuitable for discrete classification tasks.

• It may not handle outliers well, leading to incorrect classification boundaries.

• The predicted values may fall outside the 0-1 range for binary classification.

• Logistic regression is a more appropriate choice for classifi
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Q1. Pair sum problem in python.Discussion on space time complexity.
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Q2. Discussion on project.What algorithms used and why.
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Q1. What about Lubrication system & its components?
Ans. 
The lubrication system is responsible for reducing friction between moving parts in an engine by providing oil to various components.
• The main components of a lubrication system include the oil pump, oil filter, oil pan, and oil passages.

• The oil pump is responsible for circulating oil through the engine to lubricate moving parts.

• The oil filter helps remove contaminants from the oil to prevent damage to engine components...read more
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Q2. How do you diagnosis when vehicle came from overheating concern?
Ans. 
Diagnosing vehicle overheating concerns involves checking coolant levels, radiator condition, thermostat, and fan operation.
• Check coolant levels to ensure there is enough fluid to regulate engine temperature

• Inspect radiator for leaks or blockages that may be causing overheating

• Test thermostat to see if it is opening and closing properly

• Verify fan operation to ensure it is cooling the engine effectively
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Q3. What process follow for diagnosis any vehicle?
Ans. 
Diagnosing a vehicle involves a systematic process of identifying and troubleshooting issues.
• Start by gathering information from the driver about any symptoms or issues they have noticed

• Perform a visual inspection of the vehicle to look for obvious signs of damage or wear

• Use diagnostic tools such as OBD scanners to read error codes and identify specific issues

• Test drive the vehicle to observe any unusual behavior or no...read more
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Q1. What is ADAS & it's Levels
Ans. 
ADAS stands for Advanced Driver Assistance Systems. It refers to a set of safety features and technologies designed to assist drivers in the driving process.
• ADAS includes features like adaptive cruise control, lane departure warning, automatic emergency braking, and blind spot monitoring.

• There are different levels of ADAS ranging from Level 0 (no automation) to Level 5 (full automation).

• Each level represents the extent...read more
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Q2. What is differential & Transfer case, 4*4?
Ans. 
Differential & Transfer case are components of a 4*4 system in vehicles, allowing power to be distributed between front and rear wheels for better traction.
• Differential is a gear system that allows wheels to rotate at different speeds, necessary for turning

• Transfer case is a gearbox that distributes power from the transmission to both front and rear axles in a 4*4 vehicle

• 4*4 system provides better traction and stab...read more
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Q3. Aware about Connected car feathers?
Ans. 
Connected car features refer to technology that allows vehicles to communicate with each other and with external systems for improved safety, efficiency, and convenience.
• Real-time traffic updates

• Remote vehicle diagnostics

• Automatic emergency calling (eCall)

• Vehicle-to-vehicle communication

• Integration with smartphones for navigation and entertainment
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Q4. Types of Transmission use in current & pls explain?
Ans. 
Types of transmission include manual, automatic, CVT, DCT, and AMT.
• Manual transmission requires the driver to manually shift gears using a clutch pedal and gear stick.

• Automatic transmission shifts gears automatically without the need for manual input.

• CVT (Continuously Variable Transmission) uses a belt and pulley system to provide seamless gear shifts.

• DCT (Dual Clutch Transmission) uses two separate clutches for faster...read more
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Q5. What about EV & it's Technology?
Ans. 
EV technology refers to electric vehicles and their associated technologies, such as batteries and charging infrastructure.
• EV technology is rapidly advancing, with improvements in battery technology leading to longer range and faster charging times.

• Charging infrastructure is expanding to support the growing number of EVs on the road, including fast chargers and wireless charging options.

• EVs offer environmental benefits...read more
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Q1. Explain what do you understand about Automobile?
Ans. 
Automobile refers to a vehicle designed for transportation, typically with four wheels and powered by an internal combustion engine.
• Automobiles are commonly used for personal transportation, commuting, and delivery of goods.

• They come in various types such as cars, trucks, buses, and motorcycles.

• Automobiles have evolved over time with advancements in technology, safety features, and fuel efficiency.

• Examples of automobil...read more
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Q2. Explain when press the clutch pedal in manual transmission?
Ans. 
Pressing the clutch pedal in a manual transmission disengages the engine from the wheels, allowing for gear changes.
• Press the clutch pedal when shifting gears

• Press the clutch pedal when coming to a stop

• Press the clutch pedal when starting the vehicle

• Press the clutch pedal when reversing

• Press the clutch pedal when the vehicle is stationary
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Q3. Explain auto transmission solenoids ?
Ans. 
Auto transmission solenoids are electrical components that control the flow of transmission fluid to engage different gears in an automatic transmission system.
• Auto transmission solenoids are electromechanical valves that open and close to regulate the flow of transmission fluid.

• They are controlled by the vehicle's computer system to engage different gears based on driving conditions.

• Common types of auto transmission s...read more
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Q1. Explain the difference between ArrayList and LinkedList in Java. When would you choose one over the other?
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Q2. What are the advantages and disadvantages of using Java’s synchronized keyword for thread synchronization? Can you explain how the ReentrantLock compares to synchronized?
Ans. 
Java's synchronized keyword offers thread safety but has limitations compared to ReentrantLock.
• Advantages of synchronized: Simple to use, built-in language feature.

• Disadvantages of synchronized: Can lead to thread contention, no timeout options.

• ReentrantLock allows for more flexible locking mechanisms, including tryLock() and timed lock.

• ReentrantLock can be interrupted, while synchronized cannot be interrupted once a t...read more
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Q1. What markets have you covered, and based on your observations, how would you describe the mindset of different farmers in your area?
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Q2. How do you plan to contribute to the company, and what would you identify as your core strengths?
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