Danske IT Senior Software Engineer Interview Questions and Answers

Q1. Difference between Scheduled script and Map reduce script?
Ans. 
Scheduled script runs on a predefined schedule, while Map reduce script processes large datasets in parallel.
• Scheduled script is used for automating tasks at specific times, like sending reports daily at 8am.

• Map reduce script is used for processing large datasets by splitting them into smaller chunks and processing them in parallel.

• Scheduled script is typically used for routine tasks, while Map reduce script is used fo...read more
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Q2. Types of scripts in NetSuite.
Ans. 
Types of scripts in NetSuite include SuiteScript, SuiteTalk, SuiteFlow, and SuiteBuilder.
• SuiteScript: JavaScript-based scripts for customizing NetSuite functionality.

• SuiteTalk: Web services integration for connecting NetSuite with external systems.

• SuiteFlow: Visual workflow tool for automating business processes.

• SuiteBuilder: Customization tool for modifying NetSuite forms, fields, and records.
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Q1. Questions on java , spring boot , containarisation tools, coding, SOLID principles
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5 coading questions were asked in it

Q1. Manegerial round
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Q1. Write a program to merge 2 sorted list with n+m complexity
Ans. 
Merge two sorted lists with n+m complexity
• Create a new list to store the merged result

• Iterate through both lists simultaneously and compare elements

• Add the smaller element to the new list and move to the next element in that list

• Continue until all elements from both lists are merged
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Q2. From the employee table find out the employee list whose salary is highest in the department
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Q3. Singleton design patterns
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Q4. What is dependency injection
Ans. 
Dependency injection is a design pattern where components are given their dependencies rather than creating them internally.
• Dependency injection helps in achieving loose coupling between classes.

• It allows for easier testing by providing a way to mock dependencies.

• There are three types of dependency injection - constructor injection, setter injection, and interface injection.
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Q5. N+1 problem of hibernate
Ans. 
The n+1 problem in Hibernate occurs when a query results in multiple individual queries being executed for each row fetched.
• Occurs when a query fetches a collection and then for each element in the collection, another query is executed to fetch related data

• Can be resolved by using fetch joins or batch fetching to reduce the number of queries

• Improves performance by reducing the number of database round trips
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Choose the Options in Javascript, HTML, CSS

Q1. ES6 concepts of javascript
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Q2. Core concepts of Reactjs
Ans. 
Reactjs is a JavaScript library for building user interfaces.
• Component-based architecture

• Virtual DOM for efficient updates

• JSX for writing HTML in JavaScript

• State management with setState()

• Lifecycle methods like componentDidMount()
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Q1. Role discussion with Manager
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Q2. Salary discussion with HR
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Q1. Explain technical challenges you have come across and how did you overcome it?
Ans. 
I faced a technical challenge while implementing a complex algorithm for real-time data processing.
• Identified the bottleneck in the algorithm by profiling the code

• Optimized the algorithm by implementing data structures and algorithms with lower time complexity

• Tested the optimized solution thoroughly to ensure correctness and performance

• Collaborated with team members to brainstorm alternative approaches
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Q2. Explain the main feature of JavaScript frameworks
Ans. 
JavaScript frameworks provide pre-written code to simplify and speed up web development.
• Helps in organizing code and improving code quality

• Provides reusable components for faster development

• Offers built-in features like routing, state management, and data binding

• Examples: React, Angular, Vue
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Q1. There we a lot of question on Python basics 1. Iterators 2. Generator 3. List Comprehensions 4. Static Method, Class Method 5. Testing in Python - Pytest 6. Magic Methon 7. Try Except Else Block in Python ...read more
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Q2. DSA Questions 1. Balanced Parenthesis 2. String Compression - Check on Leetcode
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Q3. Basic SQL Count(*) query
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Q1. Memory Management in Python
Ans. 
Memory management in Python involves automatic memory allocation and deallocation through garbage collection.
• Python uses automatic memory management through garbage collection to allocate and deallocate memory.

• Memory is managed using reference counting and a cycle-detecting garbage collector.

• Python's memory management is efficient for most use cases, but can lead to memory leaks if circular references are not handled p
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Q2. Garbage Collection in Python
Ans. 
Garbage collection in Python is an automatic memory management process that helps in reclaiming memory occupied by objects that are no longer in use.
• Python uses a built-in garbage collector to manage memory automatically.

• The garbage collector in Python uses reference counting and a cycle-detecting algorithm to reclaim memory.

• Explicitly calling the 'gc.collect()' function can trigger garbage collection in Python.

• Garbage...read more
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Q3. Code a system to query an API, do multiprocessing and improve the efficiency
Ans. 
Code a system to query an API, do multiprocessing and improve efficiency
• Use a library like requests in Python to query the API

• Implement multiprocessing using a library like multiprocessing or threading in Python

• Optimize efficiency by caching API responses or using asynchronous programming
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