PSK Infrastructures Senior Engineer Interview Questions and Answers

Q1. About salary and experience
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Q1. Chiller trouble shooting
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Q2. Work of cchiller
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A chiller is a machine that removes heat from a liquid via a vapor-compression or absorption refrigeration cycle.
• Chillers are commonly used in air conditioning systems to cool buildings or industrial processes.

• They work by transferring heat from the liquid being chilled to a separate fluid, which is then circulated through a heat exchanger to cool it down.

• Chillers can be water-cooled or air-cooled, depending on the app
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Q3. Alarm and solutions
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Q4. Controlling andetc
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Salary and job responsibilities

Hacker Rank test with medium difficulty

Q1. Technical discussion mainly around system design, different architectures, problem solving and coding question may be asked.
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A case study for a problem statement

Q1. What is mix design?
Ans. 
Mix design is the process of determining the proportions of ingredients in concrete to achieve the desired properties.
• Mix design involves selecting the appropriate materials such as cement, aggregates, water, and admixtures.

• The proportions of each ingredient are calculated based on the desired strength, workability, and durability of the concrete.

• Testing is often conducted to ensure the mix meets specifications before
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Q1. What ppc cement and what is opc cement?
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PPC cement is Portland Pozzolana Cement, which is a type of cement that includes pozzolanic materials. OPC cement is Ordinary Portland Cement, a widely used type of cement.
• PPC cement contains pozzolanic materials like fly ash or silica fumes

• OPC cement is made from limestone and clay, without any additional materials

• PPC cement is known for its durability and resistance to chemical attacks

• OPC cement is commonly used for
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Aptitude test was easy level and moderate level.

Coding test was held in the google form which was very easy.

Q1. What is volatile keyword?
Ans. 
The volatile keyword in software engineering is used to indicate that a variable's value can be modified by multiple threads.
• Volatile keyword ensures that the variable's value is always read from and written to the main memory, rather than cached in a thread's local cache.

• It is used to prevent unexpected behavior in multi-threaded environments where multiple threads may access and modify the same variable simultaneousl...read more
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Q2. What is abstract class
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An abstract class is a class that cannot be instantiated and is meant to be subclassed.
• An abstract class can have abstract methods that must be implemented by its subclasses.

• An abstract class can also have non-abstract methods that can be inherited by its subclasses.

• An abstract class provides a common interface for its subclasses.

• An abstract class can have instance variables and constructors.

• An abstract class cannot be...read more
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Q3. Where do you use abstract class
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Abstract classes are used to provide a common interface and partial implementation for related classes.
• Abstract classes are used when you want to create a base class that cannot be instantiated on its own but can be inherited by other classes.

• They are useful when you want to define common methods and properties that multiple related classes should have.

• Abstract classes can have both abstract and non-abstract methods.

• Ab...read more
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Coding test around front end using react

Confidence is. The key. The questions are medium too tough

Q1. Arrays and all exceptions within coding
Ans. 
Arrays are data structures used to store a collection of elements. Exceptions are errors that occur during program execution.
• Arrays can be one-dimensional or multi-dimensional

• Arrays can be of primitive data types or objects

• Exceptions can be handled using try-catch blocks

• Common exceptions include NullPointerException and ArrayIndexOutOfBoundsException
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Q2. SQL joins and aggregations and window function
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Graph based questions they asked . So please be thorough with data structures.

Date and time questions particularly asked