Johnson Controls Graduate Engineer Interview Questions and Answers

Q1. What is resistor?
Ans. 
A resistor is an electronic component that resists the flow of electrical current.
• Resistors are used to control the amount of current flowing in a circuit.

• They are measured in ohms (Ω) and have color-coded bands to indicate their resistance value.

• Resistors dissipate energy in the form of heat when current flows through them.

• Examples of resistors include carbon film resistors, metal film resistors, and wirewound resisto
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Q2. Advantages of dc motor?
Ans. 
DC motors have advantages such as high starting torque, easy speed control, and simple construction.
• High starting torque allows for quick acceleration

• Easy speed control through voltage adjustment

• Simple construction with fewer parts and lower cost

• Efficient operation with minimal energy loss

• Suitable for applications requiring constant speed or variable speed operation
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Q3. Advantages of rotor?
Ans. 
Rotors provide mechanical advantage, increase efficiency, and allow for compact design.
• Rotors provide mechanical advantage by converting rotational motion into linear motion.

• They increase efficiency by reducing friction and wear compared to sliding or rubbing components.

• Rotors allow for compact design in various applications such as engines, turbines, and pumps.

• Examples include helicopter rotors, brake rotors in vehicl
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Q4. What is electric current?
Ans. 
Electric current is the flow of electric charge through a conductor.
• Electric current is measured in Amperes (A).

• It is caused by the movement of electrons in a conductor.

• The direction of current flow is from positive to negative.

• Examples of sources of electric current include batteries and power outlets.
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Q5. What is stator?
Ans. 
Stator is the stationary part of an electric motor or generator.
• Stator is the stationary component in an electric motor or generator that surrounds the rotor.

• It does not rotate and is responsible for producing a magnetic field to interact with the rotor.

• Examples include the stator in a car alternator or the stator in a wind turbine generator.
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Q6. What are the advantages of generator
Ans. 
Generators provide backup power during outages and can be used in remote locations.
• Provides backup power during outages

• Can be used in remote locations where power grid is not available

• Used in construction sites, camping trips, outdoor events, etc.
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Aptitude test was moderate.....topics like time and work, blood relations, profit and loss were frequently asked

Q1. I belong from Electronics and Telecommunication (EnTC) background....so all basic electronics related questions were asked
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Q2. Are you willing to relocate
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Q3. Any other alternatives for project
Ans. 
One alternative for the project could be implementing a different technology or methodology.
• Consider using a different programming language or framework

• Explore incorporating machine learning or AI into the project

• Look into utilizing cloud services for scalability and efficiency
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Q1. Tell me about yourself Explain your project in detail
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Got some aptitude question in the company side, and the candidates want to finish in the given time

Q1. Basic question about my resume
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Q2. Analytic questions and case study question to test my handling the situation skills
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Q1. Detail OOP concept with real life examples?
Ans. 
OOP is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.
• OOP focuses on creating objects that interact with each other to solve problems

• Encapsulation: Objects can hide their internal state and require interaction through defined interfaces

• Inheritance: Objects can inherit attributes and methods from parent classes

• Polymorphism: Objects ...read more
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Q2. SQL query to find highest salary.
Ans. 
Use SQL query with MAX function to find highest salary.
• Use SELECT statement with MAX function to retrieve highest salary from salary column.

• Example: SELECT MAX(salary) FROM employees;

• Make sure to replace 'employees' with the actual table name where salary data is stored.
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Q1. Tell me a time you solve the technical problem
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Q1. What do you know about this job?
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Assignment consist of MCQ test dealing with technical knowledge followed by game where you need to answer as much as answer in limited time (negative marking is there).

Q1. Basics about Electronic Devices
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Q2. Some general questions regarding electrical devices
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