Alstom Transportation Interview Questions, Process, and Tips

Q1. What is oops in java
Ans. 
Oops in Java stands for Object-Oriented Programming. It is a programming paradigm based on the concept of objects.
• Oops in Java allows for the creation of classes and objects, encapsulation, inheritance, and polymorphism.

• Classes are templates for objects, encapsulation hides the internal state of an object and only exposes necessary functionalities, inheritance allows for the creation of new classes based on existing on...read more
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Q2. What is object in java
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In Java, an object is an instance of a class that contains data and methods.
• Objects are created using the 'new' keyword followed by the class name

• Objects have attributes (fields) and behaviors (methods)

• Example: 'Car' class can have objects like 'myCar' and 'yourCar'
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Q3. What is polymorphism
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Polymorphism is the ability of a single function or method to operate on different types of data.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Inheritance in object-oriented programming languages like Java allows for polymorphism.
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Q4. Tell me about project
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It was easy test but have negative marking.

They gave single topic and you have to give your points one by one.

Q1. They ask subject related questions and about project
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Q2. Interpersonal skills
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Q1. Puzzle question
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Q2. About yourself and some situation based questions
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Basic aptitude test with math problems

Groups of 10 discussing on current affairs

Q1. Technical interview of one hour covering subject knowlegde
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Q2. Mosfet and igbt
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Q3. Electrical machines
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Q4. Circuit theory questions
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Q1. Basic HR questions and location matching
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Q1. Cable harness and integration
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Q2. Integration and drawing
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Q1. Why r u job change
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Q2. Experience qualifications
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Q3. Strength and weakness
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Q1. Expected salary
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Q1. 5S practices daily meetings
Ans. 
5S practices involve daily meetings to ensure organization and efficiency in the workplace.
• Daily meetings are held to discuss progress, address issues, and plan for the day.

• These meetings help to ensure everyone is on the same page and working towards common goals.

• Examples of topics discussed include safety, quality, productivity, and improvement opportunities.
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Q2. Work planing daily target
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Setting daily targets helps in planning and achieving work efficiently.
• Break down larger tasks into smaller, manageable chunks

• Prioritize tasks based on importance and deadlines

• Allocate specific time slots for each task

• Regularly review and adjust daily targets as needed
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Q1. Explain your component
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My component is a machine learning algorithm that predicts customer churn for subscription-based businesses.
• Utilizes historical customer data to identify patterns and factors leading to churn

• Applies various machine learning techniques such as logistic regression and random forests

• Generates a churn probability score for each customer

• Provides actionable insights for reducing churn rate
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Q2. C coding questions
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Q3. Basics on CAN, multi and single threading etc
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Logical Reasoning and Quants Aptitude

Q1. Draw 1st angle and 3rd angle projection
Ans. 
First angle and third angle projections are two common methods used in technical drawing to represent 3D objects on a 2D plane.
• First angle projection: object is placed in the first quadrant, with the front view on the top and the side view on the right.

• Third angle projection: object is placed in the third quadrant, with the front view on the bottom and the side view on the left.

• Both projections involve projecting the o...read more
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Q2. Stress strain diagram of mild steel
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Stress strain diagram of mild steel shows the relationship between stress and strain during deformation.
• Stress strain diagram of mild steel typically shows a linear elastic region, followed by a yield point, plastic deformation, and ultimate failure.

• The linear elastic region represents the material's ability to return to its original shape after the stress is removed.

• The yield point is where the material begins to defo...read more
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