The Orchard Interview Questions and Answers

Q1. What are custom hooks in React, and what are their use cases? Additionally, can you provide an example of a custom hook that performs an API call and utilizes the retrieved data?
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Q2. What is the difference between useMemo and useCallback in React?
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Q3. What is the difference between class-based components and functional components in React?
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Q4. How can you implement the lifecycle of a React component in a functional component?
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Q5. What are the various state management techniques available in React?
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Q6. What is the architecture of Redux, and what purposes do middlewares serve within it?
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Q7. What is hoisting in JavaScript?
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Q8. What is event bubbling in JavaScript?
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Q9. What are block scope and function scope in JavaScript?
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Q10. Have you had experience working with semantic tags in HTML?
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Q11. What are the various methods for creating an object in JavaScript?
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Q12. What are the differences between shallow copy and deep copy in JavaScript?
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Q13. What will be the output of the following JavaScript code fragment: `const a; function test() { console.log(a); }; test();`?
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Q14. How can you use CSS to arrange elements in a row and column layout?
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Q15. Have you utilized CSS preprocessors, and if so, which ones?
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Q16. If I have assigned different colors to an ID and a class and applied both to the same element, which color will be applied based on CSS specificity precedence?
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Mathematics, reasoning

Q1. Electric and electronic
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Q2. Resistor calculation- series/parralal
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Q3. Unit of capacitance, inductance
Ans. 
Capacitance is measured in farads (F) and inductance is measured in henrys (H).
• Capacitance is the ability of a component to store electrical charge, measured in farads (F)

• Inductance is the ability of a component to store energy in a magnetic field, measured in henrys (H)

• Examples: Capacitors have capacitance measured in farads, while inductors have inductance measured in henrys
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Q4. Motor work, different electrical symbol
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Q1. Salary expectation
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Q1. Next company name
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Q2. What are you post
Ans. 
Backend and office assistant
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Q3. What is your salary expectations
Ans. 
2lakh annual income
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Q4. What is your qualifications
Ans. 
Qualification graduate
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Q5. What is you post
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Q1. Introduce yourself
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Q2. Why do you want to join services
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Q3. Why do you want to leave ONGC and join Railways
Ans. 
I am seeking new challenges and opportunities for growth in a different industry.
• Looking for new challenges and opportunities for personal growth

• Interested in exploring a different industry and gaining new experiences

• Seeking a change in work environment and culture

• Want to broaden my skill set and knowledge by working in a different sector
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Q4. Radiation equation
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Q5. Max Planck law and its implication
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Q1. What is your experience
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Q2. What is you all experience
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Q1. What is your study
Ans. 
I have studied Business Administration with a focus on retail management.
• Studied Business Administration with a focus on retail management

• Took courses in marketing, sales, inventory management, and customer service

• Completed internships at retail stores to gain practical experience
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Q2. Your family members
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Q1. Store management
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Q2. Store rileted question
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Q1. All questions store related
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Q2. All question study related
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Q1. CNC programmer and setting
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Q2. Vmc setting and manually programmer
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Q1. What s technical team solve the problem
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Q2. What s control brakes while accident
Ans. 
Control brakes help prevent accidents by allowing the driver to slow down or stop the vehicle in emergency situations.
• Control brakes are operated by the driver using the brake pedal

• Anti-lock braking systems (ABS) help prevent skidding and maintain control during emergency braking

• Regular maintenance and inspection of brakes is essential to ensure they function properly
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Q3. Technical team no all
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Any ideas for an aptitude test?

Q1. You have a good network connection.
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Q2. Which individuals are currently employed?
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What is education in place?

What is a SQL Server?

Effective communication and any suggestion.

Q1. What is your name?
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Q2. What is your educational background?
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Q1. What type of work does the Deloitte company engage in?
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Q2. What type of work does Deloitte engage in?
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Q1. What is your father's name?
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Q2. What is your father's name?
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Engage with any assignment provided.

Please provide any assignments you have.

Its was moderate , basic questions and can written based on the cluster

It was easy its an combination of aptitude and gaming questions

Q1. What is Java, and why is it considered platform-independent?
Ans. 
Java is a programming language known for its platform independence due to its ability to run on any device with a Java Virtual Machine (JVM).
• Java is a high-level programming language developed by Sun Microsystems.

• It is considered platform-independent because Java programs are compiled into bytecode that can run on any device with a JVM.

• JVM acts as an interpreter that translates the bytecode into machine code specific t...read more
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Q2. What are the differences between method overloading and method overriding?
Ans. 
Method overloading involves multiple methods in the same class with the same name but different parameters. Method overriding involves a subclass providing a specific implementation of a method that is already provided by its superclass.
• Method overloading is resolved at compile time based on the method signature, while method overriding is resolved at runtime based on the object type.

• Method overloading is used to incre...read more
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Q3. What is the program for checking if a string is a palindrome?
Ans. 
A program to check if a string is a palindrome involves comparing the string with its reverse.
• Iterate through the string from both ends and compare characters.

• If all characters match, the string is a palindrome.

• Examples: 'radar' is a palindrome, 'hello' is not.
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Q4. Program for checking if given number is prime or not ?
Ans. 
A program to check if a given number is prime or not.
• Iterate from 2 to square root of the number and check for divisibility

• If the number is divisible by any number other than 1 and itself, it is not prime

• Optimization: Check divisibility only up to square root of the number
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Q5. What are the different types of Structured query Languages (SqL)?
Ans. 
Different types of SQL include MySQL, PostgreSQL, SQLite, Oracle SQL, and Microsoft SQL Server.
• MySQL - widely used open-source SQL database management system

• PostgreSQL - advanced open-source SQL database management system

• SQLite - self-contained, serverless, zero-configuration SQL database engine

• Oracle SQL - proprietary SQL database management system by Oracle Corporation

• Microsoft SQL Server - relational database manage
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Q6. Given an scenario to write sql query ?
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Q7. An aptitude question based on time and work
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Q8. What is the code for calculating the length of a rectangle given its breadth and area?
Ans. 
The code for calculating the length of a rectangle given its breadth and area involves dividing the area by the breadth.
• Calculate length = Area / Breadth

• For example, if the breadth is 5 and the area is 20, then the length would be 20 / 5 = 4
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Q9. What are the different types of data types in Java?
Ans. 
Java has primitive data types (int, double, boolean, etc.) and reference data types (arrays, classes, interfaces, etc.)
• Primitive data types include int, double, boolean, char, etc.

• Reference data types include arrays, classes, interfaces, etc.

• Examples: int num = 10; double price = 19.99; boolean isTrue = true; String name = "John";
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Q10. What are the differences between the Java Virtual Machine (JVM), Java Runtime Environment (JRE), and Java Development Kit (JDK)?
Ans. 
JVM executes Java bytecode, JRE includes JVM and libraries, JDK includes JRE and development tools.
• JVM is responsible for executing Java bytecode and providing a runtime environment.

• JRE includes JVM along with libraries and other components necessary to run Java applications.

• JDK includes JRE and development tools like compilers and debuggers for creating Java applications.

• JDK is required for developing Java application...read more
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Q11. What is a primary key in SQL?
Ans. 
A primary key in SQL is a unique identifier for each record in a table.
• Primary key ensures each record in a table is unique

• It can be a single column or a combination of columns

• Primary key values cannot be NULL

• Example: 'id' column in a 'users' table
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