Digital API Craft Senior Software Engineer Interview Questions and Answers

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Q1. Java questions, spring boot framework questions
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Q2. DSA using stream api
Ans. 
Using stream API for Data Structures and Algorithms
• Stream API in Java can be used to perform operations on collections like filtering, mapping, reducing, etc.

• It can be used for implementing various data structures and algorithms efficiently.

• For example, you can use stream API to find the sum of all elements in an array or filter out even numbers from a list.
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Q1. Java questions and spring boot questions
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Q2. One program using stream api
Ans. 
Using stream API to filter a list of numbers and find the sum of even numbers
• Use Stream.filter() to filter out even numbers

• Use Stream.mapToInt() to convert stream to IntStream

• Use IntStream.sum() to find the sum of even numbers
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Q1. Java questions and basics of testing
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Hard questions were asked

Q1. What is your strength and weakness
Ans. 
Strength: Strong problem-solving skills. Weakness: Sometimes struggle with time management.
• Strength: Ability to quickly identify and solve complex technical issues.

• Strength: Strong analytical skills to understand and improve existing codebase.

• Weakness: Occasionally struggle with prioritizing tasks and meeting deadlines.

• Weakness: Working on improving time management through better planning and organization.
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Q2. Where do you see yourself in 5yrs
Ans. 
In 5 years, I see myself leading a team of software engineers, working on cutting-edge technologies, and contributing to the growth of the company.
• Leading a team of software engineers

• Working on cutting-edge technologies

• Contributing to the growth of the company
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Q1. What are decorators in Python What is the use of __name == __main__ Django related questions
Ans. 
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
Ans. 
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
Ans. 
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. Basic JavaScript-based questions which we can find by searching JavaScript interview questions on Google. A Quick QnA session via a call where I was not asked to ask any questions to the interviewer
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Q1. Normal discussion on JavaScript and ReactJs. One coding challenge where given an array ["abc", "Silent", "Code"]. Find the matching element when the user input is "bca". It should match "abc".
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Q2. Solved it by looping through each element first. Split the string into an array to get access to each character. Using the .every() method checks whether each character of the string is present inside the ...read more
Ans. 
The question asks about using .every() and .includes() methods to check if each character of a string is present in another string.
• Loop through each element of the string

• Split the string into an array to access each character

• Use .every() method to check if each character is present in the user string

• Use .includes() method to check if the character is present
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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.
Ans. 
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.
Ans. 
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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