Gautam Solar Site Engineer Interview Questions and Answers

Q1. What are the lifecycle methods?
Ans. 
Lifecycle methods are methods that are automatically called at certain points in the lifecycle of a component in React.
• Lifecycle methods include componentDidMount, componentDidUpdate, componentWillUnmount, etc.

• These methods allow developers to perform actions at specific points in a component's lifecycle, such as fetching data after the component has been rendered.

• They are used to manage side effects, perform cleanup, ...read more
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Q2. What are the advantages and features of react?
Ans. 
React is a popular JavaScript library for building user interfaces.
• Component-based architecture for reusability and easy maintenance

• Virtual DOM for efficient updates and performance optimization

• JSX syntax for writing HTML within JavaScript

• One-way data binding for predictable data flow

• Support for server-side rendering for improved SEO

• Large community and ecosystem with many third-party libraries and tools
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Q3. Difference between class and functional components?
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Class components are ES6 classes that extend from React.Component and have state and lifecycle methods, while functional components are simple functions that take props as input and return JSX.
• Class components are defined using ES6 classes and have a render method.

• Functional components are defined as simple functions that take props as input and return JSX.

• Class components can have state and lifecycle methods like comp...read more
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Q4. What are the Higher order components?
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Higher order components are functions that take a component and return a new component with additional functionality.
• Higher order components enhance the functionality of existing components

• They can be used for code reusability and separation of concerns

• Examples include withRouter from React Router and connect from React Redux
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Q5. What are the React hooks?
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React hooks are functions that let you use state and other React features without writing a class.
• React hooks were introduced in React 16.8.

• They allow you to use state and other React features in functional components.

• Some commonly used hooks are useState, useEffect, useContext, and useReducer.

• Hooks are more flexible and easier to use compared to class components.
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Q6. What is the difference between contextAPI and Redux?
Ans. 
ContextAPI is a built-in feature in React for managing global state, while Redux is a separate library for state management in React applications.
• ContextAPI is built into React, while Redux is a separate library.

• ContextAPI is primarily used for managing global state in a React application.

• Redux provides a centralized store for state management and follows a unidirectional data flow.

• ContextAPI is simpler to use for smal...read more
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Q7. What are the semantic elements in html?
Ans. 
Semantic elements in HTML are tags that clearly define the content they wrap, providing meaning to both browsers and developers.
• Semantic elements help improve SEO by providing search engines with better understanding of the content.

• Examples of semantic elements include <header>, <footer>, <article>, <section>, <nav>, <aside>, <main>, <figure>, <figcaption>, <deta...read more
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Q8. What are the pseudo elements?
Ans. 
Pseudo elements are used in CSS to style specific parts of an element.
• Pseudo elements are denoted by double colons (::) in CSS.

• They allow styling of specific parts of an element, like the first letter or line.

• Common pseudo elements include ::before, ::after, ::first-line, and ::first-letter.
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Q9. What is box model?
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The box model is a fundamental concept in CSS that defines the layout of elements on a webpage.
• The box model consists of content, padding, border, and margin.

• Content: the actual content of the element, such as text or images.

• Padding: space between the content and the border.

• Border: a line that goes around the padding and content.

• Margin: space outside the border, separating the element from other elements.
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Q10. What is hoisting?
Ans. 
Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during the compilation phase.
• Variable and function declarations are hoisted to the top of their scope.

• Only declarations are hoisted, not initializations.

• Function declarations take precedence over variable declarations.

• Example: console.log(myVar); var myVar = 10; // Output: undefined

• Example: cons...read more
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Q11. What is difference between normal function and arrow function?
Ans. 
Normal functions are defined using the function keyword, while arrow functions are defined using the => syntax.
• Normal functions are hoisted, while arrow functions are not hoisted.

• Arrow functions do not have their own 'this' keyword, they inherit it from the parent scope.

• Arrow functions do not have their own 'arguments' object.

• Arrow functions are more concise and have implicit return.

• Arrow functions cannot be used as co
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Q12. What is splice and slice?
Ans. 
Splice and slice are methods used in programming to manipulate arrays.
• Splice is used to add or remove elements from an array at a specific index.

• Slice is used to extract a portion of an array and returns a new array.

• Example of splice: array.splice(2, 0, 'new element') - adds 'new element' at index 2.

• Example of slice: array.slice(1, 4) - extracts elements from index 1 to 3.
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Coding questions on Java script like array methods and objects handling. coding questions on React is like life cycle methods using functional components and state management.

Q1. Why should we hire you?
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Q2. How do you handle the work?
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Q1. Wind blade technician finishing
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Q2. Wind blade technician mould
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Wind blade technician finishing repair

Q1. What is line balancing
Ans. 
Line balancing is the process of evenly distributing workload among workstations in a production line to optimize efficiency.
• Line balancing aims to minimize idle time and maximize productivity

• It involves assigning tasks to workstations based on their processing times

• Example: In a manufacturing plant, line balancing ensures each workstation has a similar amount of work to do
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Q2. What is assembly balancing
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Assembly balancing is the process of optimizing the work distribution among different workstations to improve efficiency and productivity.
• Assembly balancing involves assigning tasks to different workstations in a way that minimizes idle time and maximizes throughput.

• It helps in achieving a smooth flow of work and prevents bottlenecks in the production process.

• Factors considered in assembly balancing include task time, ...read more
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Q3. What is cycle time and tact time
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Cycle time is the total time it takes to complete a process, while tact time is the time it takes to produce one unit.
• Cycle time includes all the time spent on a process, including wait time and processing time.

• Tact time is the rate at which a product must be produced to meet customer demand.

• For example, if a process takes 10 minutes to complete and the customer demand is 100 units per hour, the tact time would be 0.6 ...read more
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Q1. What is production and quality
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Production is the process of creating goods or services, while quality refers to the standard of those goods or services.
• Production involves the manufacturing or creation of goods or services.

• Quality refers to the standard or level of excellence of those goods or services.

• Production and quality are closely linked as the goal is to produce high-quality products efficiently.

• Examples: In a manufacturing plant, production ...read more
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Q2. What is OLE and OEE
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OLE stands for Overall Equipment Effectiveness and OEE stands for Overall Labor Effectiveness.
• OLE measures the overall performance of equipment in a manufacturing plant.

• OEE measures the overall performance of labor in a manufacturing plant.

• Both metrics are used to identify areas for improvement and optimize efficiency.

• Example: OLE can help identify equipment downtime and OEE can help identify labor productivity issues.
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Q1. Personal interview in hr department
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Q2. Communication easy done in English
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Q1. Qualtion on All semisters subject done in B-tech, IQ level test.
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Q1. Qualtion on previous experience and documents done in previous organization.
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Q1. About Wires,Terminal,Crimping
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Q2. Types of wires. Colors of wires
Ans. 
Types of wires include solid, stranded, and braided wires. Colors of wires vary depending on their purpose and industry standards.
• Types of wires: solid, stranded, braided

• Colors of wires vary by industry standards

• Common wire colors: black, red, blue, green, white, yellow
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Q3. About crimping. About Connector
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