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Interview Questions and Answers - Order By Newest

Q3241. Why would you use XML over JSON when using ajax ?

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Q3242. What is the difference between inheritance in PHP vs. Javascript?

JavaScript

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Q3243. Write a method to track every click on a page.

JavaScript

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Q3244. Have you had to work with memory leak problems in javascript ?

JavaScript

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Q3245. Create a component and sort the data to show specific information.

React JS

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Q3246. prototypal inheritance in Javascript

JavaScript

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Q3247. CSS Box Model

CSS

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Q3248. Develop an address form in React js.

React JS

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Q3249. Difference between Span and Div ?

Html

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Q3250. Can we check two html radio buttons together ?

Html

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Q3251. What is the advantage of moving text messages to a separate properties file , like message.properties instead of hard defining it on the html ?

Design

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Q3252. What is the use of defining equals , compareTo and hashcode methods in a class ? Where are they used ?

Core Java

Ans. equals, compareTo and hashcode are of use when the objects are used within collections.

Equals helps with collections that helps maintaining only unique objects ( like Set )

compare and compareTo helps with collections that helps maintaining objects in order ( TreeSet, TreeMap etc )

hascode helps with collections that facilitates hash searching ( like hashSet, hashMap etc )

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Q3253. Can we pass the junit test if the tested method throws the exception ? and Should we do that ?

Junit

Ans. Yes, We can pass the test even if the tested method throws an exception.

One way is know as exception testing in which the tested method is expected to throw exception and hence the expectation is set accordingly.

@Test(expected = IndexOutOfBoundsException.class)
public void test(){}

Other way is to just ignore if the tested code throws an exception. In that case , we can enclose the tested method call in the try block and within exception block, we just return gracefully.

Exception testing is perfectly ok to be done as we would like test code in case an exception occurs and if the code is handling the exception properly. Ignoring the exception by putting the tested method call within try block isn't something normal and should be avoided.

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Q3254. How does cloud computing helps saves cost ?

Cloud Computing

Ans. Cloud computing helps saving overall cost for infrastructure and service usage through following -

1. On demand Services and elasticity - You only pay for what you use. Less Ideal time.

2. Resource Pooling

3. Self Service - Less involvement of human resources

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Q3255. What is the difference between Co Location, Virtualization and Serverless ?

Infrastructure

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Q3256. Which category of service , Google Search and Drive belongs to ?

SAAS

Ans. They are SAAS ( Software as a Service )

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Q3257. Which category of service , Amazon EC2 and S3 belongs to ?

Amazon Web Services (AWS)

Ans. They are IAAS ( Infrastructure as a service )

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Q3258. Which category of services, Amazon Lambda belongs to ?

Amazon Web Services (AWS)

Ans. It's Serverless and PAAS ( Platform as a service )

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Q3259. What are the different types of Services GCP provides ?

Google Cloud Platform (GCP)

Ans. Compute
Network
Storage
Big Data
Machine Learning

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Q3260. What is the difference between Billing Alerts and Budget Quotas in GCP ?

Google Cloud Platform (GCP)

Ans. Alerts only let customer knows of any excessive usage whereas Quota restricts the usage beyond a certain point.

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Q3261. How Resource Pooling helps saving cost ?

Cloud Computing

Ans. With resource pooling and Pay as per use , Bigger companies like Google and Amazon can buy Large physical hardware and employ economy of scale and hence resulting in cost saving for customers.

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Q3262. How On demand Self Service helps saving cost ?

Cloud Computing

Ans. On Demand service restricts cost by paying only for the use and Self Service saves cost by reducing intermediary human resource cost.

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Q3263. What are some GCP Billing and Budgeting services ?

Google Cloud Platform (GCP)

Ans. Budgets and Alerts
Reports
Quotas

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Q3264. Explain AWS IAM.

Amazon Web Services (AWS)

Ans. AWS Identity And Access Management (IAM) is a webservice provided by AWS platform that provides access control capabilities (authentication and authorization) to AWS resources.

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Q3265. What is an AWS placement group

Amazon Web Services (AWS)

Ans. It is a logical grouping of instance with a single availability zone to prevent latency.

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Q3266. Name types of AWS Elastic Load Balancers.

Amazon Web Services (AWS)

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Q3267. How would you secure resources in Cloud ?

Cloud Computing

Ans. There are multiple types of security GCP provides to every customer. Data, Network, Compute, and Services. Each service have its own security layer and Google provides clients to build as per the GCP best practices like building VPC, IAM, Firewall rules and so on

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Q3268. how would you build application stack using Cloud Formation ?

Amazon Web Services (AWS)

Ans. Open the AWS CloudFormation console at https://console.aws.amazon.com/cloudformation . Create a new stack by using one of the following options: Choose Create Stack. This is the only option if you have a currently running stack.

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Q3269. How can we protect an application from an XSS attack ?

Security

Ans. By properly encoding data while persisting as well as retrieval.

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Q3270. Design Texas Hold Em poker game

Design

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