Surya Informatics Trainee Developer Interview Questions and Answers

Q1. Run time polymorphism code
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Q2. Linked list code
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Q3. Deep copy shallow copy differences
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Deep copy creates a new copy of an object with its own unique memory space, while shallow copy creates a new object that references the same memory locations as the original object.
• Deep copy duplicates all nested objects, while shallow copy only duplicates the references to nested objects.

• Deep copy ensures that changes to the copied object do not affect the original object, while shallow copy may lead to unintended sid...read more
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Q1. More deep questions about polymorphism code
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Q2. Code for interchange of strings without strcpy
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Use a loop to swap characters of two strings without using strcpy function.
• Create two arrays of characters to store the strings

• Use a loop to iterate through each character of the strings and swap them

• Ensure to handle cases where strings have different lengths
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Q1. Explain architecture of your project
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Q2. Some questions on Java, Spring Boot and sql
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Q1. Project flow and some behavioural questions
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Q2. Project contribution of yours
Ans. 
Developed a web application for tracking employee attendance and performance
• Implemented user authentication and authorization using Spring Security

• Utilized Hibernate for database interaction and data persistence

• Designed and developed RESTful APIs for frontend integration

• Used AngularJS for frontend development to create interactive user interfaces
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Q1. Basic formalities before offer release
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Q1. Context api, js related qstns, simple programming qstn,
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Q2. Remove duplicates without using set.
Ans. 
Remove duplicates from array of strings without using set.
• Iterate through the array and compare each element with all other elements to find duplicates.

• Create a new array and add elements only if they are not already present in the new array.
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A standard online test conducted through one of the testing platforms.

Q1. Java 8 features
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Q2. Rest API
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Q3. Java 8 coding problem
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Q4. Collections
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Q1. It was based on my previous project
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Q1. MVC vs .NET lifecycle
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MVC is a design pattern used in .NET development, while .NET lifecycle refers to the stages of a .NET application's execution.
• MVC is a design pattern that separates an application into three main components: Model, View, and Controller.

• .NET lifecycle refers to the stages of a .NET application's execution, including initialization, execution, and termination.

• MVC helps in achieving separation of concerns and making the c...read more
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Q2. Dispose vs Finalize
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Dispose is used to release unmanaged resources immediately, while Finalize is used for cleanup operations before an object is destroyed by the garbage collector.
• Dispose is called explicitly by the developer, while Finalize is called by the garbage collector.

• Dispose should be implemented in classes that directly interact with unmanaged resources.

• Finalize should be implemented in classes that need to release resources be...read more
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Q3. Liscov Substitution
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Q4. Dom Sanitizer in Angular
Ans. 
DOM sanitizer in Angular is used to sanitize untrusted HTML to prevent XSS attacks.
• DOM sanitizer is used to sanitize HTML content before rendering it in Angular templates.

• It helps prevent Cross-Site Scripting (XSS) attacks by removing potentially harmful content.

• Angular provides a built-in DomSanitizer service for sanitizing HTML content.

• Example: Using DomSanitizer in Angular template to sanitize a URL before rendering
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Q5. Ngrx state management, how do you manage state in your current project?
Ans. 
I use Ngrx for state management in my current project by defining actions, reducers, effects, and selectors.
• Define actions to describe user events or interactions

• Create reducers to specify how state should change in response to actions

• Implement effects to manage side effects like API calls

• Use selectors to retrieve specific pieces of state for components
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Q6. Stored procedure vs Functions
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Stored procedures are precompiled SQL queries stored in the database, while functions are reusable code blocks that return a value.
• Stored procedures are used for performing specific tasks or operations on the database.

• Functions are used to encapsulate logic and can be called within SQL queries or other functions.

• Stored procedures can have input and output parameters, while functions always return a value.

• Stored procedu...read more
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Q7. Model binder in MVC
Ans. 
Model binder in MVC is used to map data from HTTP requests to action method parameters in controllers.
• Model binder maps form data, query string parameters, and route data to action method parameters in MVC controllers.

• It helps in simplifying the process of extracting data from HTTP requests.

• Model binder can be customized by creating custom model binders to handle complex data binding scenarios.
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Q8. Would transaction be rolled back if innermost stored procedure throws an error ?
Ans. 
Yes, the transaction will be rolled back if the innermost stored procedure throws an error.
• If an error occurs in the innermost stored procedure, it will cause the entire transaction to be rolled back.

• This ensures that the database remains in a consistent state.

• Rolling back the transaction means that any changes made by the stored procedures within the transaction will be undone.
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Q9. NgOninit vs Constructor
Ans. 
NgOnInit is a lifecycle hook in Angular that is called after the component has been initialized, while the constructor is a TypeScript feature used to initialize class properties.
• NgOnInit is specific to Angular components, while constructor is a general TypeScript feature.

• NgOnInit is used for initialization logic that relies on Angular's view and input bindings being initialized, while constructor is used for basic ini...read more
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Q10. Use of zone.js file
Ans. 
zone.js is a library for managing asynchronous operations in Angular applications.
• zone.js helps in tracking asynchronous operations and their execution context in Angular applications.

• It provides hooks for intercepting asynchronous tasks like setTimeout, setInterval, and promises.

• zone.js can be used for profiling, debugging, and error handling in Angular applications.
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Q11. Write a query to identify and remove duplicated from a table.
Ans. 
Use a query with GROUP BY and HAVING clause to identify and remove duplicates from a table.
• Use GROUP BY to group rows with the same values

• Use HAVING COUNT(*) > 1 to identify duplicates

• Use DELETE statement to remove duplicates
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Q1. What is JWT Authentication
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Q2. Design Patterns
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Q3. Different Types of Routing in MVC
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Q1. Every single oops concepts
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Q2. Every sql questions possiible
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Q1. I attended only technical not yet results announced
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Q2. I attended only technical not yet result announced
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Q1. Basics of java like string ,string builder ,Buffer,scp
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Q2. Spring boot annotaions
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