KONE Electrical Maintenance Engineer Interview Questions and Answers

Q1. What is type of circuit breaker ?
Ans. 
A circuit breaker is an automatic electrical switch that protects an electrical circuit from damage caused by overload or short circuit.
• Circuit breakers are classified based on their voltage level, installation location, and interrupting capacity.

• Some common types of circuit breakers include air circuit breakers, oil circuit breakers, vacuum circuit breakers, and SF6 circuit breakers.

• Circuit breakers can be used in res...read more
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Quantitative Aptitude, Numerical Ability, Synonym etc

Q1. Introduce yourself Where you did Training? What was your academic project? Guide? What do you like? Tractor or Implement? What is your aim?
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The GD was good they give you current topic and questions related to that

Q1. Tell me about yourself
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Q2. What is role and responsibilities of leader
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There were 4 sections and first one was quant, second one was logical, third was English and finally 3 coding questions in last section

4 codes and 5 technical questions

Q1. Explain multi threading
Ans. 
Multi threading is the ability of a CPU to execute multiple threads concurrently.
• Allows for parallel execution of tasks, improving performance

• Each thread has its own stack and runs independently

• Threads can communicate and synchronize using shared memory

• Examples: running multiple tasks simultaneously in a web server, processing data in parallel
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Q2. 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.

• It enables a single interface to be used for different data types.

• Examples include method overloading and method overriding in object-oriented programming.
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Q3. Diff b/w inner and outer joins
Ans. 
Inner join returns only the rows that have matching values in both tables, while outer join returns all rows from both tables.
• Inner join: returns rows with matching values in both tables

• Outer join: returns all rows from both tables, with NULL values where there is no match

• Example: Inner join - SELECT * FROM table1 INNER JOIN table2 ON table1.id = table2.id

• Example: Outer join - SELECT * FROM table1 LEFT OUTER JOIN table
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Aptitude test, quant, grammer, logical

Related to logical,verbal

Q1. Related to coding,basic programming questions
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Topic given you need to stand out

Case study given regarding marketing opportunity

Q1. Interview taken
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60 questions in two sets, each set has 30 questions and 30 min to solve. one set consists of aptitude question and other set consists of technical question.

Q1. All questions are asked from my resume.
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