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Interview Questions and Answers - Order By Newest | ||||
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Ans. A template for the instance. Launch permission decisions A block device mapping, when an instance is launched it determines the volumes to attach to that instances. | ||||
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Like Discuss Correct / Improve  aws ami  amazon ami | ||||
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Ans. Because it gives the ability to provision infrastructure on Demand with No contracts and strings attached. | ||||
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Like Discuss Correct / Improve  Amazon Web Service (AWS)   Google Cloud Platform (GCP) | ||||
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Ans. US-East Virginia This is the oldest and most popular region. All new features are rolled first in this region and hence they are first available there. The downside is that because of experimentation with new services, unavailability time is quite high. | ||||
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Like Discuss Correct / Improve  aws region  aws us-east-1 | ||||
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Ans. It saves Network traffic and facilitates faster delivery by hosting bulk media and cached data near to client. | ||||
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Like Discuss Correct / Improve  aws edge locations | ||||
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Ans. effect means whether the effect of this Policy is to allow or deny, action means the type of action ( read , write ) and service, and resource is the resource where this should apply. For example - If we want to have a Policy of providing read access on S3 , effect will be "allow" action will be "s3:GetObject" resource will be "arn:aws:s3:::examplebucket/*" | ||||
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Like Discuss Correct / Improve  aws iam  amazon iam | ||||
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Ans. Because new files will be fed from where ever they are first available but AWS have no way to identify which is the most updated version among the various regions. The updated version can only be assured once the replication to all availability zones is complete. | ||||
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Like Discuss Correct / Improve  aws s3  aws storage  amazon cloud storage  amazon s3 | ||||
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Ans. We should only allow access that's needed. So the security Policy should be as restrictive as possible. Buckets and Files should never be made public unless until they are needed it to be like that. | ||||
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Like Discuss Correct / Improve  aws s3  aws storage  amazon cloud storage  amazon s3 | ||||
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Ans. Versioning ( will create Delete marker ) MFA Delete ( authentication upon deletion ) Cross Region Replication ( Replicates aren't deleted ) | ||||
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Like Discuss Correct / Improve  aws s3  aws storage  amazon cloud storage  amazon s3 | ||||
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Ans. We can select the appropriate Price Class if that suits us. We can do Geo Targeting by black listing / white listing certain geographies. | ||||
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Like Discuss Correct / Improve  aws cloudfront  amazon cloudfront | ||||
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Ans. If the computation required is Spiky and unpredictable. If it's first time use. If the lifespan of the application isn't known. | ||||
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Like Discuss Correct / Improve  aws ec2  aws computing  amazon cloud computing  amazon ec2 | ||||
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Ans. If the usage is non continuous and have flexible start and End Time. For ex - Analysis , Research , mining etc. | ||||
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Like Discuss Correct / Improve  aws ec2  aws computing  amazon cloud computing  amazon ec2 spot | ||||
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Ans. On Demand Reserved Spot Dedicated Host | ||||
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Like Discuss Correct / Improve  aws ec2  aws computing  amazon cloud computing  amazon ec2 | ||||
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Ans. Keeping Low cost for processing , i would choose Spot Price Plan F1 or P3 Instance Type Cold Hdd (SCI ) EBS Volume | ||||
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Like Discuss Correct / Improve  aws ec2  aws computing  amazon cloud computing  amazon ec2 | ||||
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Ans. Computation Spot Price Plan F1 or P3 Instance Type Cold Hdd (SCI ) EBS Volume Storage S3-IA | ||||
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Like Discuss Correct / Improve  aws computation  aws ec2  aws computing  amazon cloud computing  amazon ec2 | ||||
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Ans. We can assign multiple security groups to single instance and we can use single security group with multiple instances. It never results in conflict as security groups only have allow rules and no deny rules. Multiple security groups for an instance results in union of all rules. | ||||
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Like Discuss Correct / Improve  aws ec2  aws computing  amazon cloud computing  amazon ec2  aws security group | ||||
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Ans. No, We can do that through ACL | ||||
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Like Discuss Correct / Improve  aws security group | ||||
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Ans. S3 is object based whereas EFS is block based. | ||||
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Like Discuss Correct / Improve  aws s3  aws storage  amazon cloud storage  amazon s3  aws efs | ||||
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Ans. Firstly ,we have removed old backup data from server after that we are checking which user consume high memory through df command. | ||||
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Like Discuss Correct / Improve  server  Amazon Web Service (AWS)  production support Asked in 1 Companies | ||||
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Ans. Tomcat is a web server and a Servlet container. It is often used as an application server for web-based applications but does not include the complete suite of capabilities that a Java EE application server would supply. | ||||
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Like Discuss Correct / Improve  tomcat   j2ee   web server   application server   build management | ||||
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Ans. An asynchronous event is one that occurs at an unpredictable time outside the control of the program that the CPU is running. It is not "synchronized" with the program. | ||||
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Like Discuss Correct / Improve  j2ee   internet   web application   asynchronus   asynchronus communication   architecture Asked in 1 Companies | ||||
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Ans. Yes by making entries in web.xml | ||||
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Like Discuss Correct / Improve  j2ee   servlets   servelets   web application   java   web.xml   yes-no   architecture | ||||
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Ans. Within message.properties file. | ||||
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Like Discuss Correct / Improve  j2ee   web application   struts   spring Asked in 1 Companies | ||||
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Ans. The Spring Framework supports following five scopes - Singleton prototype request session global-session | ||||
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Like Discuss Correct / Improve  j2ee   spring   mvc   frameworks   web applications   beans   beans scope   at&t  fidelity | ||||
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Ans. Session cookies , which are deleted once the session is over. Permanent cookies , which stays at client PC even if the session is disconnected. | ||||
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Like Discuss Correct / Improve  j2ee   servlets   session   session management   web applications   cookies   httpsession | ||||
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Ans. Jar is Java Archieve i.e compressed Class or Class / Java files. War comprises of compressed Servlet class files,JSP FIles,supporting files, GIF and HTML files. Ear comprise of compressed Java and web module files ( was files ). | ||||
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Like Discuss Correct / Improve  java   j2ee   jar   web development   war   ear   build management   release management Asked in 12 Companies basic   frequent | ||||
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Ans. By specifying the Index like //button[@class='button'])[2] | ||||
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Like Discuss Correct / Improve  selenium   selenium webdriver   automation testing | ||||
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Ans. Selenium WebDriver is a tool for automating web application testing.It helps in replicating the manual tester behavior like keyboard entry, mouse events etc and then matching the output against the expected. | ||||
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Like Discuss Correct / Improve  selenium  webdriver Asked in 37 Companies | ||||
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Ans. Amazon Simple Storage Service or S3 is object storage with a simple web service interface to store and retrieve any amount of data from anywhere on the web. | ||||
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Like Discuss Correct / Improve  aws  amazon s3  aws s3  aws storage  amazon cloud storage  amazon s3 Asked in 12 Companies | ||||
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Ans. SOAP services are better in case we need to establish a formal and detail contract with the client or callers and hence suitable for 1. Services published for much wider unknown audience 2. Require large input payload 3. Requiring different level for authentication | ||||
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Like Discuss Correct / Improve  soap vs rest  soap  rest Asked in 2 Companies | ||||
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Ans. Web Server and Worker | ||||
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Like Discuss Correct / Improve  elastic beanstalk | ||||