Arrk Senior Software Engineer Interview Questions and Answers

String manipulation questions easy not that much hard

Q1. String manipulation
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Q2. Reverse a string according to it's input
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Q1. Java questions and basics of testing
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Q1. What are decorators in Python What is the use of __name == __main__ Django related questions
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Decorators in Python are functions that modify the behavior of other functions or methods. __name__ == __main__ is used to check if a Python script is being run directly or imported as a module.
• Decorators are used to add functionality to existing functions without modifying their code.

• They are defined using the @decorator syntax before the function definition.

• Example: @staticmethod decorator in Python is used to define...read more
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Q1. Joins in SQL, Window functions Coding question Django ORM questions
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Q1. Salary related questions
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Q1. Basic java and rest full API, multithreading and stream
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Q1. Redux flow describe
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Redux is a predictable state container for JavaScript apps.
• Redux is a state management library commonly used with React.

• It follows a unidirectional data flow pattern.

• Actions are dispatched to update the state through reducers.

• State changes are handled immutably.

• Selectors can be used to access specific parts of the state.

• Middleware can be used for side effects like async operations.

• Example: Dispatching an action to add
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Q2. Hooks in react describe
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Hooks in React are functions that let you use state and other React features in functional components.
• Hooks were introduced in React 16.8 to allow functional components to have state and lifecycle methods.

• useState() is a hook that allows you to add state to functional components.

• useEffect() is a hook that lets you perform side effects in functional components.

• Custom hooks are reusable functions that can contain statefu
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Q1. Java8 Features Questions about Stream functions and Lambda Expression
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Q2. Microservices & Springboot (Sample code and Annotations)
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Q3. DB Query to find duplicates in a table, keeping first duplicate in answer.
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DB query to find duplicates in a table, keeping first duplicate in answer.
• Use GROUP BY clause to group the records by the column(s) that may have duplicates

• Use HAVING clause to filter out groups with only one record

• Use MIN or MAX function to select the first record in each group

• Example: SELECT MIN(id), name, COUNT(*) FROM table GROUP BY name HAVING COUNT(*) > 1
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Q4. Springboot Profiles, Actuators and Response mapping.
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Q5. Code to map Employee Object from List to Hashmap using Stream API functions.
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Code to map Employee Object from List to Hashmap using Stream API functions.
• Create a List of Employee objects

• Use stream() method to convert List to Stream

• Use collect() method to convert Stream to HashMap

• Use Collectors.toMap() method to create HashMap

• Pass key and value mapping functions to toMap() method
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Q1. Sort array, database, basics of js and nodejs
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Q2. DSA array and objects
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