Tamilnadu Petroproducts Ems Trainee Interview Questions and Answers for Experienced

Q1. What is the ph of soluble oil
Ans. 
The pH of soluble oil can vary depending on the specific formulation and concentration.
• Soluble oil is a type of cutting fluid used in metalworking processes.

• It is typically a mixture of oil, emulsifiers, and additives.

• The pH of soluble oil can range from acidic to alkaline, depending on the formulation.

• The pH level is important as it can affect the performance and stability of the oil.

• For example, some soluble oils may...read more
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Q2. What is ppm of water soluble oil
Ans. 
The ppm of water soluble oil refers to the concentration of the oil in parts per million in water.
• ppm stands for parts per million

• Water soluble oil is an oil that can be dissolved in water

• The ppm of water soluble oil indicates the amount of oil present in a million parts of water

• It is a measure of the concentration of the oil in water
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Q1. Explain work experience
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Q2. Why Rain Industries
Ans. 
Rain Industries is a global leader in the production of carbon and chemical products, with a strong focus on sustainability and innovation.
• Rain Industries has a strong reputation in the industry for quality products and services.

• The company has a global presence, allowing for diverse opportunities and growth potential.

• Rain Industries is committed to sustainability and innovation, aligning with my own values and career
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Q1. Questions relating to exposures written in Resume
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Q2. Why leaving old job
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Q1. What are the relevant clauses in a contract ?
Ans. 
Relevant clauses in a contract include terms and conditions, payment terms, termination clauses, and dispute resolution.
• Terms and conditions outline the rights and obligations of the parties involved.

• Payment terms specify the amount, due date, and method of payment.

• Termination clauses define the conditions under which the contract can be ended.

• Dispute resolution clauses determine how conflicts will be resolved, such as
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Q1. Generic questions about CV
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Q2. Skill specific correlations
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Skill specific correlations refer to the relationship between different skills and how they impact each other.
• Identifying skill correlations can help in designing effective training programs.

• For example, communication skills may be correlated with leadership skills.

• Analytical skills may be correlated with problem-solving skills.

• Understanding skill correlations can also help in career planning and development.

• For instan...read more
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Only DSa and aptitude was asked

MCQ round on OOPS (java) , JS, C#, SQL(dbms)

Q1. Two DSA questions , Happy Number (leetcode Q.202) , First Unique character in String (leetcode Q.387)
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Q2. Polymorphism, Function Overloading & Overriding (code), Constructor, Access Specifier
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Q3. Project (about nextjs, diff. b/w next & react, advantage of nextjs, SPA, some discussion about tailwind, miui (library), js)
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Q4. DBMS query of second highest employee , find employeeid of manager whose employee name is 'something' (based on self join & only one table)
Ans. 
Use self join in a DBMS query to find the employeeid of the manager whose employee name is 'something'.
• Use a self join on the table to compare employee and manager names

• Order the results by employeeid in descending order to get the second highest employee

• Select the manager's employeeid where the employee name is 'something'
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Q1. What is arrow function in JS
Ans. 
Arrow functions are a concise way to write functions in JavaScript.
• Arrow functions have a shorter syntax compared to regular functions.

• They do not have their own 'this' keyword, and instead inherit 'this' from the parent scope.

• Arrow functions are best suited for non-method functions, and cannot be used as constructors.

• Example: const add = (a, b) => a + b;
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Q2. What is runtime polymerphism
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Runtime polymorphism is the ability of a subclass to override a method from its superclass during runtime.
• Runtime polymorphism is achieved through method overriding in object-oriented programming.

• It allows a subclass to provide a specific implementation of a method that is already defined in its superclass.

• The actual method called is determined by the type of object at runtime.

• Example: Animal class has a method 'makeSo...read more
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Q3. What is abstraction in oops
Ans. 
Abstraction in OOP is the concept of hiding complex implementation details and showing only the necessary features to the outside world.
• Abstraction allows us to focus on what an object does rather than how it does it

• It helps in reducing complexity and improving maintainability of code

• Example: A car is an abstraction of various components like engine, wheels, etc. Users interact with the car without needing to know the
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DSA questions Reverse the linkedlist

Q1. Explain your project
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Q2. He asked two SQL queries
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