Aadit Technologies Interview Questions and Answers

A lambda is a function that can be executed without being explicitly declared or defined.

• A lambda is an anonymous function in programming.

• It is used to write concise and efficient code.

• Lambdas are often used in functional programming languages.

• They can be used as arguments to higher-order functions.

• Lambdas are commonly used in cloud computing platforms like AWS Lambda.

Yes, you can increase the size of the root volume without shutting down the instance.

• To increase the size of the root volume, you can use the AWS Management Console, AWS CLI, or AWS SDKs.

• For example, using the AWS CLI, you can use the 'modify-instance-attribute' command to modify the 'BlockDeviceMappings' attribute of the instance.

• You can specify the new size for the root volume and apply the changes without requiring ...read more

EBS, S3, and EFS are storage services in AWS. EBS is block-level storage, S3 is object storage, and EFS is file storage.

• EBS is attached to EC2 instances and provides persistent block storage.

• S3 is a scalable object storage service for storing and retrieving data.

• EFS is a fully managed file storage service that can be accessed by multiple EC2 instances simultaneously.

Events in CloudWatch are used to monitor and respond to changes in AWS resources and applications.

• Events help in detecting and responding to operational changes in real-time.

• They can trigger automated actions or notifications based on predefined rules.

• Events can be used to monitor resource state changes, API calls, and system events.

• They enable proactive troubleshooting and help in maintaining system health.

• CloudWatch ...read more

VPC-level security focuses on securing the network infrastructure, while system-level security focuses on securing individual systems.

• VPC-level security involves configuring network access control lists (ACLs), security groups, and network traffic routing.

• System-level security involves securing individual instances or virtual machines by implementing firewalls, antivirus software, and access controls.

• VPC-level security...read more

To connect to EC2 without the pem file, create a new key pair, associate it with the instance, and then connect using the new key pair.

• Create a new key pair in the EC2 console or using the AWS CLI.

• Stop the EC2 instance for which the pem file is lost.

• Detach the root volume from the instance.

• Launch a new EC2 instance and associate the detached root volume with it.

• Create a new key pair and associate it with the new instan...read more

ELB stands for Elastic Load Balancer. There are three types of ELB: Classic Load Balancer, Application Load Balancer, and Network Load Balancer.

• ELB is a service provided by AWS to distribute incoming traffic across multiple EC2 instances.

• Classic Load Balancer operates at both the request and connection level.

• Application Load Balancer operates at the application layer and supports advanced routing features.

• Network Load ...read more