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Q571. How can you handle JavaScript popup using selenium ?

Selenium

Ans. Using javaexecutor

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Q572. How does AWS Lambda handle failure during event processing?

Amazon Web Services (AWS)

Ans. In AWS Lambda we can run a function in synchronous or asynchronous mode. In synchronous mode, if AWS Lambda function fails, then it will just give an exception to the calling application. In asynchronous mode, if AWS Lambda function fails then it will retry the same function at least 3 times.If AWS Lambda is running in response to an event in Amazon DynamoDB or Amazon Kinesis, then the event will be retried till the Lambda function succeeds or the data expires. In DynamoDB or Kinesis, AWS maintains data for at least 24 hours.

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Q573. What are the different types of load balancing options provided by Amazon Elastic Load Balancing (ELB)?

Amazon Web Services (AWS)

Ans. Application load balancing
Network load balancing
Classic load balancing

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Q574. What is AWS Snowball?

Amazon Web Services (AWS)

^{This question is still unanswered. Can you please provide an answer.}

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Q575. What is Geo Targeting in Amazon CloudFront?

Amazon Web Services (AWS)

Ans. Geo Targeting will the users country of origin and pass along with country code to you in the cloudFront viewer country header.

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Q576. What are the different types of actions in Object Lifecycle Management in Amazon S3?

Amazon Web Services (AWS)

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Q577. Can we do Cross Region replication in Amazon S3 without enabling versioning on a bucket?

Amazon Web Services (AWS)

Ans. Yes

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Q578. What is the use of Amazon Glacier?

Amazon Web Services (AWS)

Ans. Its a storage option provided by AWS which is even cheaper than S3. As the objects are archieved before saving, retrieval time is pretty bad.

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Q579. How will you upload a file greater than 100 megabytes in Amazon S3?

Amazon Web Services (AWS)

Ans. AWS now allows file upto 5GB in S3

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Q580. What is the scale of durability in Amazon S3?

Amazon Web Services (AWS)

Ans. 99.999999999%

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Q581. What is the default limit on number of EC2 instances in each region ?

Amazon Web Services (AWS)

Ans. 20

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Q582. Which ELB component is responsible for monitoring the Load Balancers?

Amazon Web Services (AWS)

Ans. Controller Service

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Q583. What are the IP address mechanisms supported by ELB?

Amazon Web Services (AWS)

Ans. IPv4 and IPv6

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Q584. Which AWS service is a task coordinator and state management service for cloud applications.

Amazon Web Services (AWS)

Ans. Amazon SWF

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Q585. Which IAM policy condition key should be used if you want to check whether the request was sent using SSL?

Amazon Web Services (AWS)

Ans. AWS: secure transport

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Q586. What is the objective of enabling versioning on a s3 bucket ?

Amazon Web Services (AWS)

Ans. So that it doesn't overwrite the existing file with the same name and maintain versioning of it.

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Q587. Pascal Triangle Program

Ans. package snippet;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Pascal {
   public static void main(String[] args) {

      System.out.println(generatePascalTriangle(5));

   }

   static Map> generatePascalTriangle(int size) {
      Map> triangle = new HashMap<>();

      triangle.put(0, Arrays.asList(1));
      triangle.put(1, Arrays.asList(1, 1));

      for (int i = 2; i <= size; i ) {
         List coeffListForI = new ArrayList<>();
         List coeffListForI_1 = triangle.get(i - 1);
         coeffListForI.add(1);
         for (int j = 0; j <= coeffListForI_1.size() - 2; j ) {
            coeffListForI.add(coeffListForI_1.get(j) coeffListForI_1.get(j 1));
         }
         coeffListForI.add(1);
         triangle.put(i, coeffListForI);
      }

      return triangle;
   }
}

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Q588. What is the cost of using Cloud Formation ?

Amazon Web Services (AWS)

Ans. Cloud Formation does not have any additional cost but you are charged for the underlying resources it builds.

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Q589. How many requests per second can Amazon CloudFront handle?

Amazon Web Services (AWS)

Ans. 10000

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Q590. What is elasticity in relation to Cloud infrastructure ?

Cloud Computing

Ans. The power to scale computing resources up and down easily with minimal friction

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Q591. With regards to VPC, what is the default maximum number of virtual private gateways allowed per region?

Amazon Web Services (AWS)

Ans. 5

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Q592. A customer has a website which is accessible over the Internet and he wants to secure the communication and decides to implement HTTPS instead of HTTP. He has configured EC2 instance behind an ELB. Where should you configure the SSL certificate?

Amazon Web Services (AWS)

^{This question is still unanswered. Can you please provide an answer.}

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Q593. what is salesforce ?

SalesForce

Ans. Salesforce is the cloud based #1 CRM (Customer Relationship Management)

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Q594. Explain different inheritance mapping strategies with JPA / Hibernate.

Hibernate

Ans. table per hierarchy
table per concrete class
table per sub class

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Q595. How to avoid cloning, serialization in the singleton class ?

Design

Ans. For Cloning-exception,For deserialization-read.resolve()

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Q596. Why did you apply for this position?

General

^{This question was recently asked at 'NIC inc'.This question is still unanswered. Can you please provide an answer.}

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Q597. What is input Stream ?

Core Java

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Q598. What will happen if there are no collections in java ?

Core Java

Ans. Collections in Java is nothing but a library implementation for data structures and algorithm. If it's not available , we might have to include some other library or provide our own implementation.

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Q599. What will happen if there are no enums in Java ?

Core Java

Ans. Enums in Java is a facility to have objects upfront and use them as constants. Even if such a facility is not available , a workaround could be achieved.

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Q600. What will happen if there are no interfaces in Java ?

Core Java

Ans. Abstract classes can take care of that to a certain extent. Though they are little heavier than Interfaces but An abstract class with all abstract methods and no instance variables will be able to help with everything that currently an interface does.

The only problem is that a class can only extend one class whereas it can implements multiple interfaces and that is the reason Interfaces were introduced in Java, i.e to get over the problem of multiple inheritance.

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