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

Interview Questions and Answers - Order By Rating

Q31. What is the difference between subscribe and emit ?

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Q32. What is the difference between closing and completing the observer / listener ?

Angular

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Q33. How can print the whole object state in the console in javascript ?

Javascript

Ans. We can JSON.stringify

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Q34. Can you share some of the best practices while designing authentication and authorization system ?

Authentication

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Q35. Could you walk me through and draw out a sketch of a recent architecture project you completed ?

architecture

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Q36. What are system integrators in Cloud Computing?

Cloud Computing

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Q37. What is Google BigQuery? What are the benefits of BigQuery for the data warehouse practitioners ?

Google Cloud Platform (GCP)

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Q38. What are the different methods for the authentication of Google Compute Engine API ?

Google Cloud Platform (GCP)

Ans. MS active directory concept and in GCP its Cloud Identity

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Q39. How does the pricing model work in GCP cloud ?

Google Cloud Platform (GCP)

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Q40. How are the Google Compute Engine and Google App Engine related ?

Google Cloud Platform (GCP)

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Q41. What do you know about Google Compute Engine ?

Google Cloud Platform (GCP)

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Q42. 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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Q43. 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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Q44. 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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Q45. Have you ever had any problem with asynchronous programming due to race condition ?

Angular

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Q46. 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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Q47. Can we use interpolation with all data types ?

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Q48. What is interpolation in Angular ?

Angular

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Q49. 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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Q50. 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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Q51. 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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Q52. 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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Q53. what is strict mode in javascript ? How is it used ?

Javascript

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Q54. What is concurrent interface ?

Core Java

Ans. ConcurrentMap is an interface and it is a member of the Java Collections Framework. It represents a Map that is capable of handling concurrent access to it without affecting the consistency of entries in a map. ConcurrentMap interface present in java.util.concurrent package.

HashMap operations are not synchronized, while Hashtable provides synchronization. Though Hashtable is thread-safe, it is not very efficient. To solve this issue, the Java Collections Framework introduced ConcurrentMap in Java 1.5.

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Q55. How dependency injection in angular helps with loose coupling in angular ?

Angular

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Q56. What will you do if your build fails and you need to fix it in an hour ?

Build Management

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Q57. 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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Q58. 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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Q59. 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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Q60. How to manage transactions in distributed applications?

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