Diebold Nixdorf Senior Software Engineer Interview Questions and Answers

Q1. Do you have working experience of SwiftUI
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Q2. Have you ever implemented or worked with server driven UIs
Ans. 
Yes, I have experience implementing server driven UIs.
• Implemented server driven UIs using JSON responses to dynamically update UI elements

• Worked with frameworks like React and Angular to handle server driven UI updates

• Used server driven UIs to efficiently manage and display large amounts of data
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Q1. What is closure and types?
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Closure is a function that captures variables from its surrounding scope, allowing it to access those variables even after the scope has closed.
• Closure allows a function to access variables from its lexical scope even after the function has finished executing.

• Types of closures include lexical closures, which capture variables from the surrounding lexical scope, and function closures, which capture variables from the fu...read more
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Q2. What is Core data and all operations with example/scenarios
Ans. 
Core Data is a framework provided by Apple for managing the model layer objects in an iOS application.
• Core Data is used for storing, retrieving, and managing data in an iOS app.

• It provides an object-oriented interface to work with data.

• Operations include creating, reading, updating, and deleting data.

• Example: Creating a new record in Core Data for a user profile.

• Example: Fetching a list of items from Core Data to displ
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Q1. Why you want to join the company?
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Q2. Why should we hire you
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Occurrence of the elements in descending order.

Q1. Design question on projects
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Q1. Offer discussion
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Q1. Java core Java related
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Q2. Multi threading and when do u choose
Ans. 
Multithreading is used to improve performance by executing multiple tasks concurrently. Choose it when tasks can run independently.
• Use multithreading when tasks can be divided into independent subtasks that can run concurrently

• Choose multithreading for tasks that involve I/O operations, such as reading/writing files or network communication

• Consider multithreading for tasks that require parallel processing, such as imag
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Q1. Docker and kubernetes
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Q2. Cloud services and AWS related
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Q1. Microservices design pattern and monitoring related questions
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Q2. Java interview questions on collections
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Q1. Cloud ,java microservices and mongo related questions
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Q1. Java 8 interview questions
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Q2. Spring boot questions
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Q1. Microservices strurcture and implementation
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DSA is asked, for example implement your HashMap, Stack, Queue

Q1. Spring boot advanced
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Q2. Java core advanced
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Q3. Reactjs hooks
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Q4. Optimisation techniques
Ans. 
Optimisation techniques are methods used to improve the efficiency and performance of software applications.
• Use of algorithms like dynamic programming to reduce time complexity

• Utilizing data structures like hash tables for faster data retrieval

• Implementing caching mechanisms to store frequently accessed data

• Profiling and analyzing code to identify bottlenecks and optimize them
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Q1. High level system design for newspaper
Ans. 
A newspaper application system design involves components like user interface, content management, user authentication, and data storage.
• User interface for reading articles and viewing images/videos

• Content management system for publishing articles, managing categories, and scheduling posts

• User authentication system for login, registration, and profile management

• Data storage for storing articles, images, user data, and
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Q2. Google map application
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Q1. General java, android and basic kotlin questions
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Q1. Same and details about projects you did
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Q1. Salary discussion
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