Johnson Controls Engineer Trainee Interview Questions and Answers

30 minute 30 questions including verbal and quantitative aptitude

Q1. Basic level technical questions related to mechanical engineering
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Q1. General level questions regarding topics in the resume
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Q1. What is the location you are willing to join
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Basically a test which will conducted in online, cover both technical and aptitude.

Group of 10 members, 30% will be the selection rate in GD.

Q1. Basically ask everything about core domain.
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Q2. Maximus question will be from DESIGN AND THERMODYNAMICS.
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Q1. Ask weather you are ready to relocate and are you willing to do the job.
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Q2. 5 year or 10 year goal etc...
Ans. 
My 5-year goal is to become a certified Professional Engineer and gain experience in project management.
• Obtain Professional Engineer certification

• Gain experience in project management

• Continue professional development through training and courses
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Q1. Tell me about yourself.
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Q2. What is your goal in the comapny
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Q1. What do you know about G - code or M - code???
Ans. 
G-code and M-code are programming languages used in CNC machines to control their movements and operations.
• G-code is used to control the movement of the machine, such as its speed, position, and direction.

• M-code is used to control the machine's auxiliary functions, such as turning on and off the spindle or coolant.

• Both G-code and M-code are written in a specific format and can be edited using a text editor or specializ...read more
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Q2. What is 5s and its benifit???
Ans. 
5S is a workplace organization method that aims to improve efficiency and productivity by eliminating waste and optimizing workflow.
• 5S stands for Sort, Set in Order, Shine, Standardize, and Sustain

• Sort involves removing unnecessary items from the workplace

• Set in Order involves organizing the remaining items in a logical and efficient manner

• Shine involves cleaning and maintaining the workplace

• Standardize involves creati...read more
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Q3. What is the role of robot in human life
Ans. 
Robots play a significant role in human life by performing tasks that are dangerous, repetitive, or impossible for humans.
• Robots can be used in manufacturing to increase efficiency and reduce human error.

• Robots can be used in healthcare to perform surgeries and assist with patient care.

• Robots can be used in exploration to gather data in environments that are too dangerous for humans.

• Robots can be used in agriculture to...read more
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Q4. Difference between Nc machines and Cnc machines
Ans. 
NC machines are manually operated while CNC machines are automated.
• NC machines require manual input for each movement while CNC machines are programmed to perform movements automatically.

• CNC machines are more precise and efficient than NC machines.

• NC machines are cheaper than CNC machines.

• Examples of NC machines include drill presses and lathes while examples of CNC machines include milling machines and laser cutters.
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Q5. Diffrence between G - code or M - code
Ans. 
G-codes are used to control the movement of the machine while M-codes are used to control the machine's functions.
• G-codes control the movement of the machine, such as its speed, direction, and position.

• M-codes control the machine's functions, such as turning on or off the spindle or coolant.

• G-codes are used more frequently than M-codes in CNC programming.

• Examples of G-codes include G00 for rapid positioning and G01 for...read more
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Q6. Diffrence between Vertical milling machines and horizontal milling machines
Ans. 
Vertical milling machines have a spindle that moves vertically while horizontal milling machines have a spindle that moves horizontally.
• Vertical milling machines are better suited for cutting and drilling metal sheets and plates.

• Horizontal milling machines are better suited for cutting and shaping solid materials like wood and plastics.

• Vertical milling machines are typically used for producing small to medium-sized par...read more
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Q7. Diffrence between lathe machine and milling machine
Ans. 
Lathe machine is used for turning and shaping cylindrical workpieces while milling machine is used for cutting and shaping flat or irregularly shaped workpieces.
• Lathe machine rotates the workpiece while the cutting tool remains stationary, while milling machine rotates the cutting tool while the workpiece remains stationary.

• Lathe machine is used for producing cylindrical shapes like shafts, rods, and bushings, while mi...read more
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Q8. What is the role of cnc machines in the company
Ans. 
CNC machines play a crucial role in the company's manufacturing process.
• CNC machines automate the manufacturing process, reducing human error and increasing efficiency.

• They can produce complex and precise parts that would be difficult or impossible to make by hand.

• CNC machines can be programmed to produce large quantities of parts with consistent quality.

• They are used in a variety of industries, including aerospace, au...read more
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After the resume screening, the shortlisted candidates were sent a link to the test which was scheduled a few days later. The test had 2 sections - Technical and Aptitude MCQs, and a Coding section.

The Coding test had 2 easy-medium level questions. They were fairly easy to complete, and I successfully passed all test-cases.

Q1. Tell me about any of the projects on your resume.
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Q2. Explain the working of Bubble Sort (I had to pen down the pseudo-code, but others were asked to write the code as well).
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Q3. Explain the working of Insertion Sort.
Ans. 
Insertion Sort is a simple sorting algorithm that builds the final sorted array one item at a time.
• Start from the second element and compare it with the previous elements to find its correct position in the sorted array.

• Repeat this process for all elements in the array.

• Example: Given array of strings ['banana', 'apple', 'orange'], after insertion sort it becomes ['apple', 'banana', 'orange'].
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Q4. How would you find the maximum and second-maximum numbers in an array? (Pseudo-code)
Ans. 
Use a loop to iterate through the array and keep track of the maximum and second-maximum numbers.
• Initialize two variables to store the maximum and second-maximum numbers.

• Iterate through the array and update the variables accordingly.

• Handle edge cases like when the array has less than two elements.
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Q5. Write the query to execute a left-join on two tables - I was shown a database with a few tables defined.
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Q6. What do you understand by the phrase 'pass-by-value'?
Ans. 
Pass-by-value is a method of passing arguments to a function where the actual value of the argument is copied to a new variable.
• In pass-by-value, a copy of the actual value of the argument is passed to the function.

• Any changes made to the parameter inside the function do not affect the original value outside the function.

• Primitive data types like integers, floats, and characters are typically passed by value.

• Example: i...read more
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Q7. If you're given two CSV files, containing 2 columns each, how would you merge the two files using Python?
Ans. 
To merge two CSV files with 2 columns each in Python, use the pandas library.
• Import the pandas library

• Read the two CSV files into pandas DataFrames

• Merge the DataFrames using a common column as the key

• Save the merged DataFrame to a new CSV file
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Q8. Puzzle - A drawer contains 10 pairs each of red and blue socks. What is the minimum number of socks that should be picked to obtain at least 1 rightly colored pair?
Ans. 3, since there are only 2 colors of socks.
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Q9. Problem Solving - How would you reduce the vehicle congestion at a junction?
Ans. 
To reduce vehicle congestion at a junction, implement traffic signal optimization, encourage public transportation, and create dedicated lanes for buses and bicycles.
• Implement traffic signal optimization to improve traffic flow and reduce wait times.

• Encourage the use of public transportation by providing incentives such as discounted fares or improved services.

• Create dedicated lanes for buses and bicycles to reduce the...read more
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Q1. What is your short-term plan in life?
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Q2. Reasons, if any, for the change in grades from high-school to university. (I went from a 95 aggregate in high-school, to a 85 aggregate in university)
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Q3. What is your preferred location and how would you adjust if you did not receive your preferred location?
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Its online test consists of technical topics

2 GD's

Q1. Technical questions based on your specialization
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