C#, Angular, ASP.NET, Design Pattern, OOPs interview questions

Atmecs

C#

• Describe Nullable keyword.
• Why is it used? What problems it solves?
• Syntax

ASP.NET

• Server.Transfer vs Response.Redirect
• Different forms of session
• Page level session state
• If we have an application where session timeout is of 10 minutes but in a page we want 30 minutes of session timeout how will we implement it?
• Method overloading and overriding in MVC
• Views vs partial views
• .Partial vs .RenderPartial

WCF & Web API

• WCF vs Web API
• Attribute routing settings and implementation
• What settings we have to do for attribute routing

SQL

• All employees with 5th Highest salary 
• Performance Tuning
• Temp table vs Table variable
• CTE
• What is distinct?

HCL

Angular

• What are the building blocks of angular?
• What are pipes? pure and impure pipes?
• Lifecycle of angular application?
• Life cycle hooks of angular component?

WCF & Web API

• Difference between Web API and WCF?
• What is the difference between Channel Factory and Service Reference?
• How did you implement security in Web API?
• What are contracts in WCF?
• How do you implement Fault contract?

C#

• SPAs vs Normal applications
• What are different design patterns you implemented
• Explain Singleton patterns
• What is the use of this keyword
• What are extension methods
• What is publisher-subscriber pattern
• SOLID Principles

EY 

SQL

• What are isolation Levels in SQL Server?
• Performance Tuning?
• What is CTE?
• Temp table vs Table variable?

MVC

• .Partial vs .RenderPartial

Web API

• When do we use OPTIONS http verb?
• Explain about JWT Tokens
• How did you implement security in Web API
• How did you implement HTTPS in Web API
• What is CORS?
• How can you enable CORS?
• What are anti forgery tokens?
• What is XSS?

WCF

• Difference between WCF and Web API?
• What is interoperability?
• Can we implement interoperability using Web API?
• What are contracts in WCF?
• What are transactions in WCF?
• What is concurrency and throttling?
• How do you implement throttling in WCF?

JRD

C# 

Interfaces

Abstract Classes

Explicit implementation of interfaces and its use

What are multicast delegates?

Why delegates are used?

Adapter pattern?

When IDoc has save and IExcel has commit and in whole application we want to use Save what will we do?

Observer pattern?

Web API?

Authentication in Web API?

Authorize attribute on controller and on actions?

NoHTTP attribute?

Anti Forgery token

Sessions - In Proc/Out Proc

JWT Token - how will you ensure it is destroyed without storing it in database

How is session maintained with / without cookies?

Angular Lifecycle

Abyll (13th March 2020)

Introduction

What is your current role in project?

What are you mainly comfortable in - js, Query

C#

Difference between Select and SelectMany

Order By at runtime without using db to be hit twice - using linq

When is interface explicit implementation is required?Dofferent ways of creating thread in c#

SQL

Two tables dept and salary, select employee with highest salary for each department

WCF -

What type of serializers are available in WCF

Common problem of deserializing the IEnumerable to more specific types

Web API -

Put vs POST

HTTP Methods supported by Web API

Common Attributes used in Web API Class

Authorization

jQuery -

Apply vs Call

Bind

Dynamically add dom nodes to any other element

how do we create a class in javascript without EC6 class keyword

difference between document.ready and document.load

typescript vs javascript

EntityFramework

Which version

How will you fetch Student's details to Student entity - lazy loading - creating collection

Virtusa- Full Stack

Javascript
What are closures
what is event callback loops
What are promises
Return type of promises
Can we chain unrelated async functions together
How to deal with related async functions in promises
Is javascript asynchronous?
How can we make javascript async?
var vs let vs const
for vs foreach
array looping

React
can we use setState in render?
lifecycle events in react in order?
how can we handle events in one component not breaking down the whole application?
is this.setState aysnc?

SQL Server FAQs

• What are transactions in SQL Server?
• How do you handle exceptions in SQL Server?
• What is Set No Count off?
• What is DBCC?
• Have you ever done Performance Tuning in SQL Server?
• What are Cursors?
• Temp Tables vs Table Variables
• How do you implement isolations in SQL Server?
• What is CTE?
• Rank vs Dense Rank?
• What are views?
• Can you update views from single table?
• Can you update views from multiple tables?