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Q91. What is the different between collection and Stream Api ?

Ans. data under collection are actually stored in memory so that they can be retrieved when needed whereas data in streams are not stored and hence we need to construct it again when needed.

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Q92. How to manage transactions in distributed applications?

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Q93. what are the issues you face when connecting to AWS for development ?

Amazon Web Services (AWS)

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Q94. What do you think of TypeScript?

TypeScript

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Q95. What are some downsides to static typing in TypeScript?

TypeScript

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Q96. What are the advantages of using TypeScript over Javascript ?

TypeScript

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Q97. What new features of TypeScript do you like ?

TypeScript

Ans. TypeScript is used to Apply types to your JavaScript code, And it shows the error in IDE while writing code and make us to fix it to avoid any bug or issue before build and deployment, for example: you put //@ts-code at top of your js file, and it will show errors in file when u make common code mistakes.

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Q98. How to debug multi server deployed application ?

Debugging

Ans. Choose the server from the list of defined servers under J2EE Server.
Choose the project to debug.
Click Apply to save changes.
Click Debug to start the server and run the application.

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Q99. How is cohesion achieved in JavaScript ?

JavaScript

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Q100. Explain interfaces in Typescript. How is it different compared to other languages ?

TypeScript

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Q101. How Object-Oriented Programming is implemented in JavaScript? How they differ from other languages?

Javascript

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Q102. Explain Servlet config

Java EE

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Q103. Explain your current project architecture.

Architecture

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Q104. Interface vs Abstraction

Core Java

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Q105. What is arrow function in Typescript ?

TypeScript

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Q106. Can we do type casting in Typescript ?

TypeScript

Ans. Yes

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Q107. What is the type of variable if we don't set any type ?

TypeScript

Ans. Any

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Q108. How is the declaration of enum in Typescript differ from Javascript ?

TypeScript

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Q109. What are benefits of strongly typing variables ?

JavaScript

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Q110. What is HMR or Hot Module Replacement in Angular ?

Angular JS

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Q111. What is the difference between Angular JS (version 1x) and Angular (version 2x) ?

Angular

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Q112. Difference between Let and Var in Javascript ?

JavaScript

Ans. Var scopes the variable to the nearest function whereas Let scopes the variable to nearest block.

For example -

function printNumbers() {
for(var i = 1; i < 3: i++){
console.log(i);
}

console.log(i); // works fine and will print 3 as i has a function scope and not local loop scope
}

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Q113. Which set of technologies do you use in your company ?

General

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Q114. Write a Program to find out negative numbers in a list.

Design

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Q115. How do you evaluate a product while migrating to open source ?

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Q116. How can we create an arraylist of unique values ?

Core Java

Ans. We can put the value in a set to enforce uniqueness and then dum those value into an arraylist.

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Q117. What is SameSite cookie attribute ?

Security

Ans. SameSite cookie attribute is used by browsers to identify how first- and third-party cookies should be handled.

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Q118. Difference between XSS and CSRF ?

Security

Ans. SRF attack requires an authenticated session, whereas an XSS attack doesn’t.
XSS doesn’t require any user interaction.CSRF is restricted to the actions the victim can perform.
XSS requires a vulnerability to happen, whereas CSRF relies on tricking the user to click a link or access a page.
CSRF can only send an HTTP request but cannot view the response. XSS can send and receive HTTP requests and responses to extract the required data.

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Q119. Do you think a csrf token should only be generated after authentication ?

Security

Ans. No, they should be created before authentication too

https://cheatsheetseries.owasp.org/cheatsheets/Cross-Site_Request_Forgery_Prevention_Cheat_Sheet.html#login-csrf

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Q120. What is a csrf token ? What is it used for ?

Security

Ans. A CSRF token is a unique, secret, unpredictable value that is generated by the server-side application and transmitted to the client in such a way that it is included in a subsequent HTTP request made by the client. When the later request is made, the server-side application validates that the request includes the expected token and rejects the request if the token is missing or invalid.

CSRF tokens can prevent CSRF attacks by making it impossible for an attacker to construct a fully valid HTTP request suitable for feeding to a victim user. Since the attacker cannot determine or predict the value of a user's CSRF token, they cannot construct a request with all the parameters that are necessary for the application to honor the request.

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