Interview Questions and Answers for 'T' | Search Interview Question

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Q2551. How do we specify constructors in TypeScript ? How is it different from other languages ?

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Q2552. What is the role of "?" in TypeScript constructors ?

TypeScript

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Q2553. How can we make the constructor variables optional in Typescript ?

TypeScript

Ans. Using "?" with the variables

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Q2554. 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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Q2555. 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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Q2556. What are the advantages of using TypeScript over Javascript ?

TypeScript

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Q2557. Do you know typescript ?

TypeScript

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Q2558. write an angular Typescript program to add item into an array

TypeScript

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Q2559. What are some downsides to static typing in TypeScript?

TypeScript

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Q2560. What do you think of TypeScript?

TypeScript

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Q2561. How to manage transactions in distributed applications?

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Q2562. What is the different between collection and Stream Api ?

Core Java

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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Q2563. What are the benefits of Java over other Programming Languages ?

Core Java

Ans. 1. JVM that makes it platform independent and facilitates portability.
2. Garbage Collector that protects from Memory Leaks.
3. Only usage of references and not pointer arithmetic and hence protects the application from memory issues like dangling pointers, memory leaks etc.
4. Support for OOPs that makes application development and maintenance easy.
5. Facilitates library development through use of interface / abstract classes.
6. Facilitates creation of scalable applications.
7. Huge repository of libraries and pool of people with java skill.

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Q2564. Design pattern used in struts.

Struts

Ans. Struts controller uses the Command design pattern and the action classes use the Adapter design pattern. The process() method of the RequestProcessor uses the Template method design pattern.

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Q2565. What will you do if your build fails and you need to fix it in an hour ?

Build Management

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Q2566. How dependency injection in angular helps with loose coupling in angular ?

Angular

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Q2567. what is strict mode in javascript ? How is it used ?

Javascript

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Q2568. What is the main difference between unique key and primary key ?

Database

Ans. Primary key will not accept NULL values whereas Unique key can accept one NULL value.

A table can have only primary key whereas there can be multiple unique key on a table.

A Clustered index automatically created when a primary key is defined whereas Unique key generates the non-clustered index.

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Q2569. Difference between ViewChild and ContentChild.

Angular

Ans. Any directive, component, and element which is part of component template is accessed as ViewChild. Whereas, any element or component which is projected inside is accessed as ContentChild.

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Q2570. Which change detection strategy do you use in your application and Why ?

Angular

Ans. We use ChangeDetectionStrategy.Push

As the application grows bigger , The default change detection strategy could become a performance overhead and hence should be avoided.

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Q2571. What are the different conditions that triggers view update in case of push ChangeDetectionStrategy ?

Angular

Ans. 1. Any change in Input
2. Any even originating from the component or it's child components
3. Explicit trigger

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Q2572. What is interpolation in Angular ?

Angular

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Q2573. Can we use interpolation with all data types ?

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Q2574. What are the limitations with using interpolation ? Why do we need property binding ?

Ans. Interpolation can only work with String types and hence we need property binding while working with other data types.

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Q2575. Have you ever had any problem with asynchronous programming due to race condition ?

Angular

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Q2576. Have you ever used sessionStorage ? What is the better way to store session information - sessionStorage or session cookie ?

Session Management

Ans. Session Cookie, because session storage can be accessed from XSS (Cross site Scripting) attacks but cookies (if set with "HttpOnly" and "Secure" flags) are more safer against these attacks.

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Q2577. What are the benefits of using UI framework like Angular , View js etc instead of plain vanilla js and html ?

Javascript

Ans. These frameworks facilitates easier product development and enhancement and maintainability by having separation of concerns ( using oops ) and helps in development of reusable libraries / components. So in nutshell , they make development and maintenance of large scale application easier.

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Q2578. What are the libraries and tools for cloud storage on GCP ?

Google Cloud Platform (GCP)

Ans. Console - GUI Interface
gsutil - Command Line Interface
Rest API - Using JSON or XML API

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Q2579. What do you know about Google Compute Engine ?

Google Cloud Platform (GCP)

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Q2580. How are the Google Compute Engine and Google App Engine related ?

Google Cloud Platform (GCP)

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