KONE Graduate Trainee Interview Questions and Answers

APTITUDE WAS VERY TOUGH

Q1. Basic branch related questions, example is Electronics bg: aec,ld,ckt theory
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Q2. Interested domain and question on it
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Q3. Personal interests ,hobbies
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Q1. About engineering drawings
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Q2. Other drawing symbols
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Q3. Type of stresses, how does it work?
Ans. 
Stresses can be of various types such as tensile, compressive, shear, etc. and they affect the behavior of materials under load.
• Tensile stress occurs when a material is stretched or pulled apart, like when you pull a rubber band.

• Compressive stress occurs when a material is squeezed or compressed, like when you push a spring.

• Shear stress occurs when a material is twisted or sheared, like when you cut a piece of paper wi...read more
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Q4. Type of heat transfers
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There are three types of heat transfer: conduction, convection, and radiation.
• Conduction is the transfer of heat through a material without any movement of the material itself.

• Convection is the transfer of heat through a fluid (liquid or gas) due to the movement of the fluid.

• Radiation is the transfer of heat through electromagnetic waves, such as from the sun or a fire.

• Examples of conduction include touching a hot stov...read more
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Q5. Tell me about your project briefly?
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Q1. Preorder , post-order and in-order traversal of tree
Ans. 
Tree traversal methods in computer science
• In-order traversal: Left, Root, Right

• Pre-order traversal: Root, Left, Right

• Post-order traversal: Left, Right, Root

• Example: In-order traversal of tree with nodes 1, 2, 3 would be 1, 2, 3
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Q2. Hashmap can the key value be an object?
Ans. 
Yes, the key value in a Hashmap can be an object.
• In Java, the key in a Hashmap can be any object, not just primitive types.

• The key must override equals() and hashCode() methods for proper functioning.

• Example: HashMap employeeMap = new HashMap<>();
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Technical, Verbal, Numerical

On spot topic or technical topic

Q1. What are the thermodynamics system
Ans. 
Thermodynamic systems are physical systems that exchange energy with their surroundings.
• A thermodynamic system can be open, closed, or isolated.

• Examples of thermodynamic systems include a gas in a container, a steam engine, and a refrigerator.

• Thermodynamic systems can exchange energy in the form of heat and work.
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Q2. Explain rankine cycle, reheat rankine and regenerative rankine and its p-v and t-s diagram
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Rankine cycle is a thermodynamic cycle used in steam power plants to generate electricity.
• Rankine cycle is a thermodynamic cycle that converts heat into work using steam as the working fluid.

• Reheat Rankine cycle involves reheating the steam in between stages to increase efficiency.

• Regenerative Rankine cycle involves extracting steam from the turbine at various stages to preheat the feedwater.

• P-V diagram for Rankine cyc...read more
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Q3. Bernoulli equation, cavitation
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Q4. Dynamic viscosity, Kinematic viscosity
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Q5. Simply support beam
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Q6. Principal stress
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Q7. Angle of projection, on spot drawing calculation
Ans. 
Angle of projection is the angle at which an object is launched into the air.
• Angle of projection affects the range and height of the projectile.

• It is measured from the horizontal axis.

• The optimal angle of projection for maximum range is 45 degrees.

• The formula to calculate the range is R = (v^2 * sin(2θ)) / g, where v is the initial velocity, θ is the angle of projection, and g is the acceleration due to gravity.

• The for...read more
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Q1. General information
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