Aurus Java Developer Interview Questions, Process, and Tips

Logic based multiple mcq type questions

Q1. Opps concepts, multi threaded
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Reverse of string code

Q1. Code singleton design pattern in java
Ans. 
Singleton design pattern ensures a class has only one instance and provides a global point of access to it.
• Create a private static instance of the class

• Provide a public static method to access the instance

• Ensure the constructor is private to prevent instantiation of multiple objects
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Q2. 2 sum in java
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2 sum problem in Java involves finding two numbers in an array that add up to a specific target value.
• Use a HashMap to store the difference between the target value and each element in the array.

• Iterate through the array and check if the current element's complement exists in the HashMap.

• Return the indices of the two numbers that add up to the target value.
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Q3. How to make a class immutable
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To make a class immutable, ensure that its state cannot be changed after instantiation.
• Make all fields private and final

• Do not provide setter methods

• Ensure that any mutable objects within the class are also made immutable
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Q4. Async annotation
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Q5. Spring-starter dependencies
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Q1. What is cyclomacic complexity
Ans. 
Cyclomatic complexity is a software metric used to measure the complexity of a program.
• It measures the number of linearly independent paths through a program's source code.

• It helps in identifying complex code that may be difficult to maintain or test.

• A higher cyclomatic complexity indicates a higher risk of errors and bugs in the code.

• It is calculated using the formula: E - N + 2P, where E is the number of edges, N is ...read more
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Q2. Simple output questions based on inheritance
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Q3. OWASP top 10 security vulnerabilities
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Q1. Data Structure and algorithm
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Q2. System design question
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2 Questions - One Easy and One Medium

Q1. Some Basics of DBMS and one DSA related question
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Q1. How much was your previous in hand salary?
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Q2. How far do you stay from the office, during nights if needed can you come on your own during any critical situation (Note: I'm a woman)?
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Q3. Are you ok with 40% less in-hand pay from your previous job in Banglore, since you're getting to stay in your hometown and your expenses will be less here?
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Q4. Are you married? Do you have children? What does your husband do? How long are you planning to stay in Bhubaneswar?
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Q5. Are you ok with an employment bond of 24 months with a probation period of 12 months
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Q1. What are different modules of node js?
Ans. 
Node.js has several core modules that provide essential functionality for building applications.
• HTTP: Allows Node.js to transfer data over the Hyper Text Transfer Protocol (HTTP)

• FS: Provides file system operations like reading and writing files

• OS: Gives information about the operating system on which Node.js is running

• Path: Helps in working with file and directory paths

• Events: Allows to handle events in Node.js applica
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Q2. Difference between angular and node js
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Angular is a front-end framework for building client-side applications, while Node.js is a back-end runtime environment for running server-side applications.
• Angular is used for building dynamic web applications with HTML, CSS, and TypeScript.

• Node.js is used for server-side scripting and building scalable network applications.

• Angular is a front-end framework developed and maintained by Google.

• Node.js is a back-end runti...read more
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Q3. Difference between process.nextTick( ) and setImmediate( )
Ans. 
process.nextTick() is called before any I/O events, while setImmediate() is called after I/O events.
• process.nextTick() is called at the end of the current event loop cycle, before any I/O events.

• setImmediate() is called at the beginning of the next event loop cycle, after I/O events.

• Use process.nextTick() for executing code asynchronously but as soon as possible.

• Use setImmediate() for executing code asynchronously afte
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Q4. How to implement async in node js
Ans. 
Async in Node.js can be implemented using callbacks, promises, or async/await.
• Use callbacks to handle asynchronous operations in Node.js

• Promises can be used for cleaner asynchronous code

• Async/await provides a more synchronous way to write asynchronous code
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Q5. General operations of Casendra CQL
Ans. 
Casendra CQL is a query language used for general operations in Casendra database.
• Casendra CQL is similar to SQL but optimized for Cassandra database

• It supports CRUD operations (Create, Read, Update, Delete)

• It allows for filtering, sorting, and aggregating data

• Example: SELECT * FROM table_name WHERE column_name = value;
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Q6. Characteristics of column family
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Column family is a data model used in NoSQL databases to store related data together.
• Used in NoSQL databases like Apache Cassandra

• Consists of rows and columns

• Columns are grouped together and stored on disk sequentially

• Supports wide rows and dynamic columns

• Example: In a social media application, a column family could store user profiles with columns for name, age, and location
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Q1. CEO asked to turn on camera. Asked if i'm married (i'm a woman), the interview was scheduled for 10;30pm in the night. Asked me not to be so formal and treat him like a friend and be casual. I suspect he w...read more
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