Chetu Angular Developer Interview Questions and Answers

The coding test consists of multiple-choice questions and one medium-hard level coding question.

Q1. Given three jugs with different capacities and no measuring tools, how can you measure out a specific amount of water using the jugs you have?
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Q2. What is the angle between the minute and hour hand of a clock at 3:45?
Ans. 
The angle between the minute and hour hand of a clock at 3:45 is 157.5 degrees.
• Calculate the angle formed by the hour hand from 12 o'clock position to 3:45 position (135 degrees)

• Calculate the angle formed by the minute hand from 12 o'clock position to 3:45 position (22.5 degrees)

• Subtract the smaller angle from the larger angle to get the angle between the two hands (157.5 degrees)
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Q3. What is indexing in Database Management Systems (DBMS)?
Ans. 
Indexing in DBMS is a technique used to improve the performance of queries by allowing faster retrieval of data.
• Indexes are data structures that store a small portion of the data set in an easily searchable format.

• They help in speeding up the data retrieval process by reducing the number of disk accesses needed.

• Indexes can be created on one or more columns of a table to improve the performance of SELECT queries.

• Example...read more
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Q4. What is the lifecycle of a React component?
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The lifecycle of a React component includes mounting, updating, and unmounting phases.
• Mounting phase: constructor, render, componentDidMount

• Updating phase: shouldComponentUpdate, render, componentDidUpdate

• Unmounting phase: componentWillUnmount
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Q5. How you delete entry in mongodb database
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To delete an entry in MongoDB database, you can use the deleteOne() or deleteMany() methods.
• Use deleteOne() method to delete a single document based on a specific condition

• Use deleteMany() method to delete multiple documents based on a specific condition

• Make sure to specify the filter criteria to accurately delete the desired entry
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The topic given to me is AI is good or bad

Q1. Program to find prime number
Ans. 
A program to find prime numbers in a given range.
• Iterate through numbers in the given range

• Check if each number is divisible by any number other than 1 and itself

• If not divisible, then the number is prime
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Q2. Program to find the duplicates
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Program to find duplicates in an array of strings
• Iterate through the array and store each element in a hash set

• If an element is already in the hash set, it is a duplicate

• Return a list of all duplicates found
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Q1. Self introduction
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Q2. Explanation of project code
Ans. 
The project code is a web application that allows users to create and share interactive quizzes.
• The code uses HTML, CSS, and JavaScript to create the front-end interface.

• It utilizes Node.js and Express for the back-end server.

• MongoDB is used as the database to store user-generated quizzes.

• Socket.io is used for real-time communication between users during quiz sessions.
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4 questions of coding, level - easy and medium

Q1. Asp.net mvc , sql server etc
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Q1. Managerial round, .net and sql server related questions
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Q1. Salary negotiation
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Q1. Why you want to join Amadeus
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Q2. WHy left the previous company
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Q3. What do you know about Amadeus
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Q4. Why we should pay you this much
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Q1. LRU Cache question and couple on array
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Q1. System Design question related to Lift
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Q1. Managerial, project related and SQL
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Q1. Will you be able to work in Rotational Shifts?
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Q2. How much experience do you have in SQL and Node JS.
Ans. 
I have 5 years of experience in SQL and Node JS.
• I have worked extensively with SQL databases, writing complex queries and optimizing performance.

• I am proficient in using Node JS for server-side development, building RESTful APIs and handling database operations.

• I have experience in integrating SQL databases with Node JS applications using libraries like Sequelize or Knex.

• I have successfully delivered projects that invo...read more
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Q1. What is Index in SQL?
Ans. 
Indexes in SQL are data structures that improve the speed of data retrieval operations on database tables.
• Indexes are created on one or more columns of a table to allow faster searching and sorting of data.

• They work similar to the index of a book, allowing the database engine to quickly locate the data.

• Indexes can be created on primary keys, foreign keys, or any other frequently searched columns.

• They reduce the amount ...read more
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Q2. What are the different types of Normalization in DBMS?
Ans. 
Normalization is a process in DBMS that eliminates data redundancy and ensures data integrity.
• Normalization is used to organize data in a database efficiently.

• There are different normal forms, such as 1NF, 2NF, 3NF, BCNF, and 4NF.

• Each normal form has specific rules and dependencies to achieve data normalization.

• Normalization helps in reducing data duplication, improving data consistency, and simplifying database mainte...read more
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Q3. What do you know about Views in mySQL?
Ans. 
Views in mySQL are virtual tables that are based on the result of a query. They can be used to simplify complex queries and provide a layer of abstraction.
• Views are created using the CREATE VIEW statement.

• They are stored in the database and can be accessed like regular tables.

• Views can be used to hide complexity by encapsulating complex queries into a single view.

• They can also be used to restrict access to certain colu...read more
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Q4. What are Stored Procedures?
Ans. 
Stored Procedures are precompiled database objects that contain a set of SQL statements and can be executed with a single call.
• Stored Procedures are used to encapsulate and execute frequently used SQL statements.

• They improve performance by reducing network traffic and optimizing query execution.

• They can accept input parameters and return output values.

• Stored Procedures can be used for data manipulation, data retrieval,...read more
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Q5. Tell me something about Internet of Things.
Ans. 
Internet of Things (IoT) refers to the network of physical devices, vehicles, appliances, and other objects embedded with sensors, software, and connectivity.
• IoT enables devices to collect and exchange data over the internet.

• It allows for remote monitoring and control of devices and systems.

• IoT has applications in various industries such as healthcare, transportation, agriculture, and smart homes.

• Examples of IoT device...read more
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Q1. Questions about Past Experience, the projects I have worked on.
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Q2. What does JWT stand for? How do we use them?
Ans. 
JWT stands for JSON Web Token. It is a compact, URL-safe means of representing claims between two parties.
• JWT is used for authentication and authorization purposes in web applications.

• It consists of three parts: header, payload, and signature.

• The header contains the algorithm used to sign the token.

• The payload contains the claims or information about the user.

• The signature is used to verify the integrity of the token.

• J...read more
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Q3. What is the difference between Webtokens and APIs?
Ans. 
Webtokens and APIs are both used in web development, but they serve different purposes.
• Webtokens are used for authentication and authorization, providing a secure way to transmit user information between client and server.

• APIs (Application Programming Interfaces) are sets of rules and protocols that allow different software applications to communicate and interact with each other.

• Webtokens are often used within APIs to...read more
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Q4. What is oAuth, what method did you use for Authentication/ Authorisation is your project?
Ans. 
oAuth is an open standard for authorization. In my project, I used the oAuth 2.0 protocol for authentication and authorization.
• oAuth is a protocol that allows users to grant limited access to their resources on one website to another website without sharing their credentials.

• It provides a secure way for users to authenticate and authorize third-party applications to access their data.

• oAuth 2.0 is the most widely used v...read more
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Q5. If the data in a table is already normalized, what can we do to further optimize is?
Ans. 
Further optimization of normalized data can be achieved through indexing, denormalization, and caching.
• Create appropriate indexes on frequently queried columns to improve query performance.

• Consider denormalizing the data by combining related tables to reduce the number of joins required.

• Implement caching mechanisms to store frequently accessed data in memory for faster retrieval.

• Use materialized views or summary tables...read more
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Q6. How do you perform indexing in a database, which column you use for indexing?
Ans. 
Indexing in a database improves query performance by creating a data structure that allows for faster data retrieval.
• Indexing involves creating an index on one or more columns of a database table.

• The column used for indexing should be chosen based on the frequency of data retrieval and the cardinality of the column.

• Columns with high selectivity and frequent data retrieval are good candidates for indexing.

• Examples of co...read more
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4 questions been asked in coding test

Q1. DSA been asked in the interview
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Q1. How do u deal with the members who are having conflict of interest
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