Addverb Technologies Interview Questions, Process, and Tips

Q1. Advantages of Hashset over ArrayList?
Ans. 
HashSet provides constant time performance for basic operations like add, remove, contains, while ArrayList does not.
• HashSet does not allow duplicate elements, while ArrayList allows duplicates.

• HashSet does not maintain insertion order, while ArrayList maintains insertion order.

• HashSet is faster for checking if an element exists (contains) compared to ArrayList.
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Q2. Difference between spring created via literal and object.
Ans. 
Spring created via literal is created using curly braces with key-value pairs, while spring created via object is created using a constructor function.
• Spring created via literal: var spring = { color: 'blue', length: 10 };

• Spring created via object: function Spring(color, length) { this.color = color; this.length = length; }
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Q3. Two SQL queries based on aggregate.
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Q1. Basics of SpringBoot
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Q2. Basics of Microservices
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Aptitude was good. Question level was good

The topic of GD was very good

Q1. Interview was very good.
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Q2. Brief introduction about me
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Q3. Why i want to join the company
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Q4. Why they select me in company
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Q5. Explain 5 strength and weakness
Ans. 
Strengths: Research skills, communication, adaptability, organization, teamwork. Weaknesses: Public speaking, time management, delegation, perfectionism, assertiveness.
• Strength: Strong research skills - able to gather and analyze data effectively

• Strength: Excellent communication skills - able to convey complex ideas clearly

• Strength: Adaptability - able to quickly adjust to new situations and challenges

• Strength: Strong ...read more
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Q1. Why do you want to switch from your current workplace
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Q1. How do 72 slot 50 hp motor riwinding
Ans. 
Rewinding a 72 slot 50 hp motor involves disassembling the motor, removing the old windings, and replacing them with new windings.
• Disassemble the motor carefully to access the windings

• Remove the old windings without damaging the core

• Calculate the number of turns and wire gauge needed for the new windings

• Wind the new coils carefully and evenly in the slots

• Connect the windings properly and test the motor for functionalit
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Q2. How do no nc ful form and connection
Ans. 
NO NC stands for Normally Open and Normally Closed. They refer to the state of a switch or relay when it is not activated.
• NO (Normally Open) - the switch is open (off) when not activated

• NC (Normally Closed) - the switch is closed (on) when not activated

• Used in electrical circuits to control the flow of current

• Commonly used in control panels, automation systems, and safety circuits
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Q3. How do earthing point cheack
Ans. 
Earthing points are checked by using a multimeter to measure the resistance between the earthing point and the earth electrode.
• Use a multimeter set to the resistance mode

• Connect one probe to the earthing point and the other probe to the earth electrode

• Check the resistance reading on the multimeter

• A low resistance reading indicates a good earthing connection

• Repeat the process for all earthing points in the system
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Q1. How do fan rewinding
Ans. 
Fan rewinding is the process of replacing the copper wire coils in the stator of a fan motor to restore its functionality.
• Disconnect the fan from the power source before starting the rewinding process.

• Remove the fan blades and outer casing to access the stator.

• Carefully unwind the old copper wire coils from the stator and measure their length and gauge.

• Select the appropriate gauge and length of copper wire for rewindin...read more
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Q1. What is working for contactor realay
Ans. 
A contactor relay is an electrical device used to control a high-power circuit with a low-power signal.
• Contactor relay consists of a coil, contacts, and an enclosure.

• When the coil is energized, it creates a magnetic field that pulls the contacts together to close the circuit.

• Contactor relays are commonly used in motor control circuits to start and stop motors.

• They can also be used in lighting control, heating systems,
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Q2. Question required as per H
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Q1. What is semiconductor
Ans. 
A semiconductor is a material that has electrical conductivity between that of a conductor and an insulator.
• Semiconductors are used in electronic devices such as transistors, diodes, and integrated circuits.

• They have a band gap that allows them to selectively conduct electricity.

• Common semiconductor materials include silicon, germanium, and gallium arsenide.

• Semiconductors are crucial components in the field of electron
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