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AWS notes

 AWS ===== supported products 1-->Compute 2-->Storage 3-->Network and content delivery 4-->Developer tools 5-->Management tools 6-->Security compliance 7-->Application services 8-->Messaging Characteristics of cloud services 1-->on Demand self service 2-->Broader Network access 3-->Resource pooling 4-->Measured Services Categories/ types of  within Cloud computing : 1-->Software as service 2-->Platform as service 3-->Infrastructure as service Types of Cloud Services : 1-->IaaS 2-->PaaS 3-->SaaS Geographical dispersement: 1--> Availability Zones (Az's)  --Logical group of Datacenters  2--> Edge Locations  --Point of presence services used to deliver the content (such as Cloud front ,CDN (Content Distribution Network)) Infrastructure Usage (EC2)        -- On demand --Which is where you only pay for the inst...
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apprials

 =====2019-2020 Customer Satisfaction index: I've taken initiative in responding the calls in meetings and also dividing work to offshore team assigned by EAI app manager Adeline Lee, or onsite team.I have been able to address all the SRs and CRs for EAI interface setups in non prod and prod.I was able to decommission more than 60 interfaces in PROD and non PROD after deeply analyzing and making the decisions .As a team we are able to decommission nearly 200 interfaces.I have completed all the assigned tasks within SLA timelines.Adhere to attending meetings and timely responding to client questions , addressing all mails and proactively suggesting and keeping our opinions on others suggestions led us to gain customer confidence and satisfaction. Communication Listens effectively and expresses ideas in a clear, concise and organized manner. Pays attention to verbal/non-verbal cues and adapts accordingly. Conveys the desired information and influences others towards required action t...
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javascript

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  Optional chaining     allows us to access deeply nested properties values , without having to check whether the intermediate property exists or not. In Javascript Optional Chaining is represented by ` ?. `   and this feature was introduced in ES2020 Let's understand this in detail. For an example consider   response   object Accessing a non-existed property will throw an Error. To avoid this error obvious solution would be to check the value using   if   or the conditional operator   ?  before accessing its  properties as mentioned below Code language: JavaScript ( javascript ) As we can see the   response.customer  appears twice. For more deeply nested properties , that becomes a problem as more repetitions are required Lets try accessing  response.customer.address.street
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var in java8

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  We all know that java is a strongly typed language. From the past releases it has introduced many features to avoid boilerplate code and simplify the data types of the language. So Guess what is it? Let's learn about the  Collections operations  and  var  keyword introduced in java 10. Collections operations   Set<String> GFG =  new   HashSet<String>() {{              add( "griet" );              add( "jntuh" );              add( "osmania" );              add( "cbit” );                 } }; Instead of using instance of collection to perform operations we can use double brace initialisation concept which reduces the boiler-plate code. Var k...
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