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| Ans. R4 | ||||
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 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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| Discuss Correct / Improve aws computation 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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| Discuss Correct / Improve aws ec2 aws computing amazon cloud computing amazon ec2 | ||||
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| Ans. On Demand Reserved Spot Dedicated Host | ||||
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| Discuss Correct / Improve aws ec2 aws computing amazon cloud computing amazon ec2 | ||||
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| Ans. If there are regulatory requirements, or proprietary license to be used. | ||||
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| Discuss Correct / Improve aws ec2 aws computing amazon cloud computing amazon ec2 dedicated host | ||||
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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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| Discuss Correct / Improve aws ec2 aws computing amazon cloud computing amazon ec2 spot | ||||
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| Ans. If the usage is continuous , stable and predictable. | ||||
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| Discuss Correct / Improve aws ec2 aws computing amazon cloud computing amazon ec2 reserved | ||||
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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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| Discuss Correct / Improve aws ec2 aws computing amazon cloud computing amazon ec2 | ||||
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| Ans. Amazon Glacier is used for storing archieved files / objects and hence well suited for files where retrieval time isn't that important. | ||||
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| Discuss Correct / Improve aws s3 aws storage amazon cloud storage amazon s3 aws s3 aws storage amazon cloud storage amazon s3 glacier aws glacier | ||||
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| Ans. IA stands for infrequently accessed and hence it's suited for files / objects are expected to be accessed infrequently. | ||||
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| Discuss Correct / Improve aws s3 aws storage amazon cloud storage amazon s3 aws s3 aws storage amazon cloud storage amazon s3-ia | ||||
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| Ans. public static int getLevel(Node root, int key) { int levelOfNode = getLevelUtil(root, key, 1); return levelOfNode; } public static int getLevelUtil(Node root, int key, int level) { if (root == null) return 0; if (root.data == key) return level; int left = getLevelUtil(root.left, key, level 1); int right = getLevelUtil(root.right, key, level 1); if (left != 0) return left; else return right; } | ||||
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| Ans. import java.util.Random; public class OTPGenerator { public static void main(String[] args) { int otpLength = 4; String otp = generateOTP(otpLength); System.out.println("Generated OTP: " otp); } private static String generateOTP(int length) { StringBuilder otp = new StringBuilder(); Random random = new Random(); for (int i = 0; i < length; i ) { int digit = random.nextInt(10); otp.append(digit); } return otp.toString(); } } | ||||
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| Ans. We can use multi part upload API | ||||
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| Discuss Correct / Improve aws s3 aws storage amazon cloud storage amazon s3 | ||||
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| Ans. Price Class Geo Targeting Signed Urls , Signed Cookies | ||||
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| Discuss Correct / Improve aws cloudfront amazon cloudfront | ||||
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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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| Discuss Correct / Improve aws cloudfront amazon cloudfront | ||||
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| Ans. 1. Protocol ( http, https ) 2. Url Pattern ( *, /abc* ) 3. Operation ( Put , Post , Delete etc ) 4. Geo | ||||
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| Ans. Origin is the origin of File or services which CloudFront distributes like S3 in US East-1 Distribution is the combination of Edge locations that helps in the distribution of content / service. | ||||
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| Ans. CDN is Content Delivery Network AWS CloudFront provides CDN service | ||||
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| Ans. Yes | ||||
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| Discuss Correct / Improve aws s3 aws storage amazon cloud storage amazon s3 | ||||
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| Ans. AWS CloudFront | ||||
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| Discuss Correct / Improve aws s3 aws storage amazon cloud storage amazon s3 aws cloudfront amazon cloudfront | ||||
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| Ans. In Transit ( SSL / TSL ) At Rest Server Encryption ( SSE-S3, SSE-KMS, SSE-C ) | ||||
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| Discuss Correct / Improve aws s3 aws storage amazon cloud storage amazon s3 | ||||
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| Ans. Yes | ||||
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| Discuss Correct / Improve aws s3 aws storage amazon cloud storage amazon s3 | ||||
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| Ans. Yes | ||||
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| Discuss Correct / Improve aws s3 aws storage amazon cloud storage amazon s3 | ||||
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| Ans. We can use S3 lifecycle management to transition older objects into AWS Glacier. | ||||
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| Ans. No, its not allowed currently. | ||||
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| Ans. No. Replication is only allowed across regions. We can manually copy into other bucket though. | ||||
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| Ans. No, delete markers are not replicated. | ||||
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| Ans. No , Both the source and destination should have versioning enabled. | ||||
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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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| Discuss Correct / Improve aws s3 aws storage amazon cloud storage amazon s3 | ||||
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| Ans. If the objects / bucket is versioned in S3, Any delete operation on S3 object doesn't physically deletes the object but rather creates a delete marker version. We need to delete the delete marker to physically delete it. | ||||
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