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I applied via Naukri.com and was interviewed before May 2023. There were 3 interview rounds.
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, ...
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
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...
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
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.
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...
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...
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.
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.
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...
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
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.
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.
I applied via Recruitment Consultant and was interviewed before Oct 2020. There were 5 interview rounds.
I am highly skilled in decision making and have a strong track record of making effective and efficient decisions.
I have a systematic approach to decision making, considering all relevant factors and weighing the pros and cons.
I am able to analyze complex situations and quickly identify the best course of action.
I am confident in my decision making abilities and can make tough decisions under pressure.
I have a history ...
I have strong technical skills.
I have a deep understanding of various programming languages and frameworks.
I have experience in designing and implementing complex systems.
I am proficient in troubleshooting and resolving technical issues.
I continuously update my skills to stay up-to-date with the latest technologies.
I have successfully completed several challenging projects in the past.
Strong communication skills with experience in presenting technical information to both technical and non-technical audiences.
Experience in delivering presentations and explaining complex technical concepts in a clear and concise manner.
Ability to adapt communication style based on the audience, whether it's colleagues, clients, or stakeholders.
Active listening skills to understand and address concerns or questions eff...
Confidence is the belief in oneself, while skill is the ability to perform a task.
Confidence is a subjective feeling, while skill is a measurable capability.
Confidence can be influenced by external factors, while skill is developed through practice and experience.
Confidence can vary from person to person, while skill can be objectively assessed.
Confidence alone may not guarantee success, but skill is essential for achi...
posted on 2 Jun 2023
Aptitiude, Reasoning , EEE basic Questions
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.
Consists of two coils of wire, known as primary and secondary coils
Primary coil receives electrical energy and creates a magnetic field
Magnetic field induces a voltage in the secondary coil, transferring energy
Used in power distribution, voltage regulation, and electrical isolation
Exampl...
Mutual induction is the process where a changing current in one coil induces a voltage in another coil.
Mutual induction occurs when two coils are placed close to each other and the magnetic field produced by one coil induces a voltage in the other coil.
The induced voltage in the second coil is directly proportional to the rate of change of current in the first coil.
This phenomenon is the basis for the operation of tran...
Flux is the flow of electric or magnetic field lines through a surface, while current is the flow of electric charge.
Flux is a measure of the flow of a physical property through a given area.
In electromagnetism, flux refers to the flow of electric or magnetic field lines through a surface.
Current is the flow of electric charge through a conductor.
Flux and current are related through Faraday's law of electromagnetic ind
posted on 23 Jun 2023
I applied via Company Website and was interviewed before Jun 2022. There were 3 interview rounds.
DTR stands for Dead Time Recovery. It is a structure used in the oil and gas industry to separate gas and liquid phases.
DTR is typically made of steel or other corrosion-resistant materials.
The structure is designed to handle high pressure and temperature conditions.
Common materials used in the construction of DTR include carbon steel, stainless steel, and duplex stainless steel.
The choice of material depends on factor...
A Bucoz relay is a type of protective relay used in power systems to detect faults and isolate them to prevent damage.
Bucoz relay is a type of protective relay used in power systems.
It functions by detecting faults in the system and isolating them to prevent damage.
It helps in maintaining the stability and reliability of the power system.
Bucoz relay operates based on the principle of electromagnetic induction.
Examples ...
Pipe earthing of DTR involves using a metal pipe buried in the ground to provide a low-resistance path for fault currents.
Metal pipe is buried vertically in the ground near the DTR
The pipe is filled with alternate layers of charcoal and salt to improve conductivity
A copper wire is connected to the pipe and then to the DTR for grounding purposes
I applied via Walk-in and was interviewed in Dec 2022. There were 3 interview rounds.
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
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, ...
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 ...
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 ...
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.
I applied via Company Website and was interviewed before Jun 2021. There were 4 interview rounds.
I applied via Company Website and was interviewed before Apr 2023. There was 1 interview round.
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
7QC tools are a set of quality control tools used to identify and solve quality problems in manufacturing processes.
7QC tools include Pareto chart, cause-and-effect diagram, control chart, histogram, scatter diagram, flowchart, and check sheet.
They help in identifying and analyzing quality problems, determining root causes, and implementing corrective actions.
They are used to improve product quality, reduce defects, an...
PPAP and APQP are quality management systems used in manufacturing.
PPAP stands for Production Part Approval Process and is used to ensure that manufactured parts meet customer requirements.
APQP stands for Advanced Product Quality Planning and is used to plan and manage the design and development of new products.
Both systems are commonly used in the automotive industry but can be applied to other manufacturing industrie...
Pareto is a principle that states 80% of effects come from 20% of causes.
Also known as the 80/20 rule
Used in business to identify the most important factors
Can be applied to various fields such as economics, engineering, and social sciences
Example: 80% of a company's profits come from 20% of its customers
OEE can be calculated by multiplying Availability, Performance, and Quality percentages.
Calculate Availability by dividing Operating Time by Planned Production Time.
Calculate Performance by dividing Actual Production by Maximum Production.
Calculate Quality by dividing Good Units by Total Units Produced.
Multiply Availability, Performance, and Quality percentages to get OEE.
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