Best Value Chem Fireman Interview Questions and Answers

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 ...read more
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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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Only DSa and aptitude was asked

Q1. General questions
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Q1. Technical Test and product test
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Q1. Deep knowledge of Market
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Q1. What is the concrete
Ans. 
Concrete is a strong and durable building material made from a mixture of cement, sand, gravel, and water.
• Concrete is commonly used in construction for buildings, roads, bridges, and more

• It is known for its strength, durability, and versatility

• The ingredients of concrete include cement, sand, gravel, and water

• Concrete can be poured into molds to create various shapes and structures
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Q2. How admixture work in concrete and different type of admixture and its uses.
Ans. 
Admixtures are added to concrete to alter its properties or enhance its performance. They can improve workability, durability, and strength.
• Admixtures are added to concrete during mixing to modify its properties.

• Types of admixtures include water-reducing, air-entraining, accelerating, retarding, and plasticizers.

• Water-reducing admixtures improve workability and reduce water content.

• Air-entraining admixtures create smal...read more
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Q3. Properties of construction materials
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Construction materials have various properties that affect their performance and durability.
• Strength: Ability to withstand loads without breaking or deforming (e.g. concrete, steel)

• Durability: Resistance to wear, weathering, and deterioration over time (e.g. brick, stone)

• Density: Mass per unit volume, affects weight and insulation properties (e.g. wood, foam)

• Thermal conductivity: Ability to conduct heat, important for ...read more
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Q4. How to do mix design for different grade.
Ans. 
Mix design for different grade involves determining the proportions of materials to achieve desired concrete properties.
• Identify the required grade of concrete based on project specifications.

• Select suitable materials such as cement, aggregates, and water.

• Calculate the mix proportions based on desired strength and workability.

• Perform trial mixes and adjust proportions as needed.

• Test the concrete for desired properties ...read more
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Q1. Brief about previous work experience
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Q2. Questions regarding technical knowledge
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Q1. Discussion regarding salary
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Q1. Expected salary and Prevoius salary details
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Q2. For how long you will associate with company
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