Hitachi Solutions Software Engineer Interview Questions and Answers

Q1. Oops concept ? SQL Queries ?
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Same here , asked basics of java and C#

60 MCQ questions are there

Q1. Simple java questions are there
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Q2. Array list vs Linked List
Ans. 
Array list is faster for accessing elements by index, while Linked List is better for frequent insertions and deletions.
• Array list has constant time access to elements by index, while Linked List requires traversing the list to find an element.

• Linked List is better for frequent insertions and deletions as it only requires changing pointers, while Array list may require shifting elements.

• Array list uses contiguous memor...read more
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About front end , html, css, reasoning,

Q1. What.is let , var, const
Ans. 
let, var, and const are keywords used in JavaScript to declare variables with different scopes and mutability.
• let is used to declare variables with block scope and allows reassignment

• var is used to declare variables with function scope and allows redeclaration

• const is used to declare variables with block scope and does not allow reassignment, but the value can still be mutable
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Q1. What is angular
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Angular is a popular open-source front-end web application framework developed by Google.
• Angular is used for building dynamic web applications.

• It allows for the creation of single-page applications.

• Angular uses TypeScript for building applications.

• It provides features like data binding, dependency injection, and routing.

• Angular has a large community and ecosystem of libraries and tools.

• Examples: AngularJS, Angular 2, A...read more
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Q2. Services in angular
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Services in Angular are singleton objects that can be used to share data and functionality across components.
• Services are used to encapsulate reusable functionality, such as data fetching, logging, or authentication.

• Services can be injected into components, directives, or other services using Angular's dependency injection system.

• Services are typically defined using the @Injectable decorator.

• Example: A DataService serv...read more
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Q1. Communication skills.
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Q1. Python memory management
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Q1. What is angular
Ans. 
Angular is a popular open-source front-end web application framework developed by Google.
• Angular is used for building dynamic web applications.

• It allows for the creation of single-page applications.

• Angular uses TypeScript for building applications.

• It provides features like data binding, dependency injection, and routing.

• Angular has a large community and ecosystem with many libraries and tools available.
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Q2. What is an angular
Ans. 
Angular is a popular open-source web application framework developed by Google.
• Angular is used for building dynamic web applications.

• It allows for the creation of single-page applications.

• Angular uses TypeScript for building applications.

• It provides features like data binding, dependency injection, and routing.

• Angular has a large community and ecosystem with many libraries and tools available.
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Q1. What is OOPS- What are SOLID principles- Explain the difference between Asp.net - asp.net CORE Explain DI- Explain Authentication and Authorization Testing Logical Skills and understanding-
Ans. 
OOPS is a programming paradigm that focuses on objects and their interactions. SOLID principles are design principles for writing maintainable and scalable code. ASP.NET and ASP.NET Core are frameworks for building web applications. DI is a design pattern that allows for loose coupling and easier testing. Authentication is the process of verifying the identity of a user, while authorization determines what actions a us...read more
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Q1. About Design Patterns. Authorization- Securing APIs About Architectures and more-
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Q1. Write a program Binary Search?
Ans. 
Binary search is a divide and conquer algorithm that efficiently finds the target value within a sorted array.
• Start by defining the low and high indices of the array.

• Calculate the middle index and compare the target value with the middle element.

• If the target value is less than the middle element, search the left subarray. If greater, search the right subarray.

• Repeat the process until the target value is found or the s
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Q2. What isCICD flow?
Ans. 
CI/CD flow stands for Continuous Integration/Continuous Deployment flow, which is a software development practice where code changes are automatically built, tested, and deployed.
• CI/CD flow involves automating the process of integrating code changes into a shared repository, running automated tests, and deploying the changes to production.

• Continuous Integration (CI) focuses on automating the build and testing of code c...read more
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Q3. How to handle Enum feature?
Ans. 
Enums are a feature in programming languages that allow you to define a set of named constants.
• Enums can be used to improve code readability by giving meaningful names to values

• Enums can be used in switch statements to handle different cases

• Enums can have associated values or raw values for more flexibility
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Q4. Singleton handles the Syncronized ?
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Yes, Singleton handles synchronization by ensuring only one instance of a class is created and providing global access to that instance.
• Singleton pattern restricts the instantiation of a class to one object.

• It provides a global point of access to the instance.

• Synchronization can be implemented in the Singleton pattern to ensure thread safety.

• Example: Singleton pattern is commonly used in database connections to ensure
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Q5. What are external Libraries are used in project?
Ans. 
External libraries are pre-written code that can be imported and used in a project to provide additional functionality.
• External libraries help in reducing development time by providing ready-made solutions for common tasks.

• Examples include React for front-end development, NumPy for scientific computing in Python, and Retrofit for making network calls in Android apps.
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