Quiz

No.	Training Unit	Lecture	Training content	Question	Level	Mark	Answer	Answer Option A	Answer Option B	Answer Option C	Answer Option D	Explanation
1	Unit 5: Basic Cloud Essentials for Developer	Lec1	Amazon ECR	What is the primary purpose of Amazon ECR (Elastic Container Registry)?	Easy	1	A	A managed container image registry that stores Docker images	A database service for containers	A compute service for running containers	A networking service for containers	ECR is a managed container image registry that stores Docker images for applications and integrates seamlessly with EC2 and other AWS services.
2	Unit 5: Basic Cloud Essentials for Developer	Lec1	Amazon EC2	What does Amazon EC2 (Elastic Compute Cloud) provide?	Easy	1	B	Container orchestration	Virtual servers where application code runs	Object storage	Database management	EC2 provides virtual servers where your application code runs. In multi-agent systems and RAG pipelines, EC2 instances host the orchestration layer and agent runtime environments.
3	Unit 5: Basic Cloud Essentials for Developer	Lec1	NAT Gateway	What is the primary function of a NAT Gateway in AWS?	Medium	1	C	Storing data in the cloud	Managing user permissions	Allowing private VPC resources to initiate outbound internet connections while remaining unreachable from the internet	Load balancing traffic between servers	NAT Gateway allows resources inside your private VPC to initiate outbound connections to the internet while remaining unreachable from the internet.
4	Unit 5: Basic Cloud Essentials for Developer	Lec1	VPC	What is a VPC (Virtual Private Cloud) in AWS?	Easy	1	D	A storage service	A compute instance	A database	A private network in AWS where you can isolate your resources	A VPC is a private network in AWS where you can isolate your resources. All services (EC2, databases, etc.) run within a VPC, controlling who can access what.
5	Unit 5: Basic Cloud Essentials for Developer	Lec1	Amazon DynamoDB	Which of the following best describes Amazon DynamoDB?	Easy	1	A	A fast, NoSQL database excellent for applications requiring quick, unpredictable access patterns	A relational database service	A file storage service	A container registry	DynamoDB is a fast, NoSQL database excellent for applications requiring quick, unpredictable access patterns. It automatically scales based on traffic.
6	Unit 5: Basic Cloud Essentials for Developer	Lec1	Amazon RDS	What type of data is Amazon RDS best suited for?	Medium	1	B	Unstructured data with simple access patterns	Structured data with complex relationships and transactions	Container images	Vector embeddings only	RDS provides managed relational databases. Unlike DynamoDB, RDS is best for structured data with complex relationships and transactions.
7	Unit 5: Basic Cloud Essentials for Developer	Lec1	Amazon S3	What can Amazon S3 (Simple Storage Service) store?	Easy	1	C	Only Docker images	Only database records	Any type of data—documents, images, logs, or raw training data	Only text files	S3 is object storage that can hold any type of data—documents, images, logs, or raw training data. It’s highly scalable and cost-effective for large-scale data storage.
8	Unit 5: Basic Cloud Essentials for Developer	Lec1	Amazon Bedrock	What does Amazon Bedrock provide?	Medium	1	A	Serverless access to foundation models for language generation and embedding tasks	Container orchestration services	Virtual private networking	Object storage	Amazon Bedrock provides serverless access to foundation models, enabling both language generation and embedding tasks without managing infrastructure.
9	Unit 5: Basic Cloud Essentials for Developer	Lec1	AWS IAM	What is the primary purpose of AWS IAM (Identity and Access Management)?	Easy	1	D	Storing files in the cloud	Running virtual machines	Managing databases	Controlling who can access which AWS resources and what actions they can perform	IAM controls who can access which AWS resources and what actions they can perform. It’s fundamental for secure multi-agent architectures.
10	Unit 5: Basic Cloud Essentials for Developer	Lec1	RAG Pipeline	In a typical RAG system, what is the purpose of vectorization?	Medium	1	B	Compressing files for storage	Converting extracted text to embeddings for semantic search	Encrypting data for security	Formatting data for display	In RAG systems, vectorization converts extracted text to embeddings using services like Bedrock Embedding (Titan v2) for semantic search and retrieval.
11	Unit 5: Basic Cloud Essentials for Developer	Lec2	IAM Configuration	What command is used to configure AWS CLI with your credentials?	Easy	1	A	aws configure	aws setup	aws init	aws credentials	The command aws configure is used to set up your access key, secret access key, region, and output format for AWS CLI.
12	Unit 5: Basic Cloud Essentials for Developer	Lec2	IAM Access Keys	Where can AWS credentials be stored for authentication?	Medium	1	C	Only in environment variables	Only in the AWS web console	In ~/.aws/credentials file, environment variables, or via aws configure	Only in the application code	AWS credentials can be stored in ~/.aws/credentials file, using export commands for environment variables, or configured via aws configure command.
13	Unit 5: Basic Cloud Essentials for Developer	Lec2	Amazon Bedrock	Which Python library is used to interact with Amazon Bedrock for chat functionality?	Medium	1	B	boto3 only	ChatBedrockConverse from langchain_aws	requests	tensorflow	The ChatBedrockConverse class from langchain_aws is used to interact with Amazon Bedrock for chat functionality with foundation models.
14	Unit 5: Basic Cloud Essentials for Developer	Lec2	Embedding Models	Which embedding model is mentioned as available in Amazon Bedrock?	Easy	1	D	GPT-4	DALL-E	Claude	Cohere Embed English v3	Embedding models available in Bedrock include Titan v2 and Cohere (cohere.embed-english-v3) for creating vector embeddings.
15	Unit 5: Basic Cloud Essentials for Developer	Lec2	S3 Bucket	What is a requirement when naming an S3 bucket?	Easy	1	A	The bucket name must be globally unique across all AWS users	The bucket name must start with a number	The bucket name must be exactly 10 characters	The bucket name must contain special characters	When creating an S3 bucket, the name must be globally unique across all AWS users.
16	Unit 5: Basic Cloud Essentials for Developer	Lec2	S3 Vectors	What parameters are required when creating an index in S3 Vectors?	Hard	1	C	Only bucket name	Only index name and dimension	vectorBucketName, indexName, dataType, dimension, and distanceMetric	Only region and bucket name	When creating an index in S3 Vectors, you need to specify vectorBucketName, indexName, dataType (e.g., float32), dimension (e.g., 1024), and distanceMetric (e.g., cosine).
17	Unit 5: Basic Cloud Essentials for Developer	Lec2	Amazon ECR	In a CI/CD pipeline, what command is used to authenticate Docker with Amazon ECR?	Medium	1	B	docker login ecr	aws ecr get-login-password	aws ecr authenticate	docker ecr connect	The command aws ecr get-login-password is used to get the password and pipe it to docker login for ECR authentication.
18	Unit 5: Basic Cloud Essentials for Developer	Lec2	EC2 Security	What should be configured in EC2 security groups to allow web traffic?	Easy	1	A	Inbound rules for HTTP and HTTPS traffic	Only outbound rules	VPC peering	NAT Gateway rules	Security groups need inbound and outbound rules to allow necessary traffic such as HTTP, HTTPS, and SSH for EC2 instances.
19	Unit 5: Basic Cloud Essentials for Developer	Lec2	EC2 CLI	Which AWS CLI command is used to stop an EC2 instance?	Easy	1	D	aws ec2 terminate-instances	aws ec2 start-instances	aws ec2 describe-instances	aws ec2 stop-instances	The command aws ec2 stop-instances --instance-ids <instance-id> is used to stop an EC2 instance.
20	Unit 5: Basic Cloud Essentials for Developer	Lec2	S3 Upload	When using boto3 to upload a file to S3, which method of the S3 client is used?	Medium	1	B	put_file	upload_file	send_file	transfer_file	The s3_client.upload_file() method is used in boto3 to upload a file to an S3 bucket, taking the file path, bucket name, and object name as parameters.
21	Unit 5: Basic Cloud Essentials for Developer	Lec1	Service Selection	A customer wants to build a chatbot that can answer questions based on their company documents. Which combination of services should they use?	Hard	1	A	S3 for document storage, Bedrock for embeddings and LLM, DynamoDB for conversation state	EC2 only for all processing	RDS for document storage, EC2 for LLM	VPC and NAT Gateway only	For a RAG-based chatbot, S3 stores documents, Bedrock provides embeddings and LLM capabilities, and DynamoDB maintains conversation state for multi-turn interactions.
22	Unit 5: Basic Cloud Essentials for Developer	Lec1	Service Selection	A customer needs to store user profiles with complex relationships between users, roles, and permissions. Which service is most appropriate?	Medium	1	B	DynamoDB	Amazon RDS	Amazon S3	Amazon ECR	RDS is best for structured data with complex relationships and transactions, making it ideal for user profiles with relationships between users, roles, and permissions.
23	Unit 5: Basic Cloud Essentials for Developer	Lec1	Problem Solving	A customer’s agents in a private VPC need to call external LLM APIs but the agents should not be directly accessible from the internet. What should they use?	Medium	1	C	VPC Peering	Internet Gateway	NAT Gateway	Direct Connect	NAT Gateway allows resources inside a private VPC to initiate outbound connections to the internet while remaining unreachable from the internet.
24	Unit 5: Basic Cloud Essentials for Developer	Lec1	Service Selection	A customer wants to deploy multiple microservices as containers and needs a place to store and version their Docker images. Which service should they use?	Medium	1	A	Amazon ECR	Amazon S3	Amazon RDS	Amazon DynamoDB	ECR is a managed container image registry that stores Docker images, enables versioning of pipeline processing containers, and integrates with CI/CD for automated deployments.
25	Unit 5: Basic Cloud Essentials for Developer	Lec1	Problem Solving	A customer needs to run inference pipelines that require flexible compute resources that can scale based on demand. Which service should they choose?	Medium	1	D	Amazon S3	Amazon DynamoDB	Amazon ECR	Amazon EC2	EC2 provides virtual servers with flexible compute for varying workloads, allowing customers to scale up or down based on demand and pay only for resources used.
26	Unit 5: Basic Cloud Essentials for Developer	Lec1	Service Selection	A customer wants to implement semantic search across their knowledge base without managing embedding infrastructure. Which service should they use?	Medium	1	B	Amazon RDS	Amazon Bedrock	Amazon EC2	NAT Gateway	Amazon Bedrock provides serverless access to embedding models like Titan v2, enabling semantic similarity matching without managing infrastructure.
27	Unit 5: Basic Cloud Essentials for Developer	Lec1	Problem Solving	A customer needs to ensure each component in their multi-agent system has only the necessary permissions to access specific resources. What should they implement?	Medium	1	A	AWS IAM with least-privilege access principles	VPC with private subnets	NAT Gateway restrictions	S3 bucket policies only	IAM enforces least-privilege access principles, defines roles for different agent services, and controls access to all AWS resources.
28	Unit 5: Basic Cloud Essentials for Developer	Lec1	Architecture	A customer is building a RAG system and needs to store pre-computed vector embeddings for fast retrieval. Which storage option should they consider?	Hard	1	C	RDS with standard tables	DynamoDB with string attributes	S3 Vectors or S3 with structured format	EC2 local storage	S3 can store pre-computed vector embeddings in a structured format, and S3 Vectors enables efficient similarity search and retrieval for RAG systems.
29	Unit 5: Basic Cloud Essentials for Developer	Lec1	Problem Solving	A customer needs low-latency access to agent metadata and conversation context during multi-turn interactions. Which database should they use?	Medium	1	D	Amazon RDS	Amazon S3	Amazon ECR	Amazon DynamoDB	DynamoDB provides low-latency access to agent metadata, stores conversation state and context, and maintains session information for multi-turn interactions.
30	Unit 5: Basic Cloud Essentials for Developer	Lec1	Architecture	A customer wants to isolate their agent infrastructure for security and compliance while enabling private communication between components. What should they set up?	Medium	1	B	NAT Gateway	VPC	IAM Roles	S3 Bucket Policies	VPC isolates infrastructure for security, controls network traffic between services, enables private communication, and supports compliance requirements.
31	Unit 5: Basic Cloud Essentials for Developer	Lec1	Service Selection	A customer needs to store large amounts of training data for fine-tuning models and wants a cost-effective, highly scalable solution. Which service fits best?	Medium	1	A	Amazon S3	Amazon RDS	Amazon DynamoDB	Amazon EC2 EBS	S3 is highly scalable and cost-effective for large-scale data storage, making it ideal for storing training data for fine-tuning models.
32	Unit 5: Basic Cloud Essentials for Developer	Lec1	Problem Solving	A customer’s application requires ACID transactions for critical operations involving user data. Which database service should they use?	Hard	1	C	Amazon DynamoDB	Amazon S3	Amazon RDS	Amazon ECR	RDS supports ACID transactions for critical operations, making it suitable for applications requiring transaction integrity.
33	Unit 5: Basic Cloud Essentials for Developer	Lec1	Architecture	A customer is designing a data ingestion pipeline where raw documents need to be stored and later processed for text extraction. Which service should store the raw documents?	Medium	1	B	Amazon DynamoDB	Amazon S3	Amazon RDS	Amazon ECR	In a typical RAG pipeline, raw documents are stored in S3 before being processed for text extraction. S3 serves as the data lake for multi-agent knowledge.
34	Unit 5: Basic Cloud Essentials for Developer	Lec1	Problem Solving	A customer needs to audit all access and actions performed on their AWS resources for compliance purposes. Which service provides this capability?	Medium	1	D	Amazon S3	Amazon VPC	Amazon DynamoDB	AWS IAM	IAM audits all access and actions for compliance, providing visibility into who accessed which resources and what actions were performed.
35	Unit 5: Basic Cloud Essentials for Developer	Lec1	Service Selection	A customer wants to use foundation models for agent reasoning and decision-making without managing GPU infrastructure. Which service should they use?	Medium	1	A	Amazon Bedrock	Amazon EC2 with GPU instances	Amazon SageMaker	AWS Lambda	Amazon Bedrock provides serverless access to foundation models like NOVA PRO for agent reasoning and decision-making without managing infrastructure.
36	Unit 5: Basic Cloud Essentials for Developer	Lec2	Problem Solving	A developer created an IAM user but cannot access S3 vectors service. The error says “Access Denied”. What is the most likely issue?	Hard	1	C	The AWS CLI is not installed	The region is incorrect	The user lacks the required s3vectors permissions policy	The S3 bucket doesn’t exist	Some policies like s3vectors are not available in the policy generator, so an inline policy with s3vectors actions must be created and attached to the user.
37	Unit 5: Basic Cloud Essentials for Developer	Lec2	Problem Solving	A customer wants to run their Python application that uses boto3 on a new machine but gets “NoCredentialsError”. What should they do first?	Medium	1	B	Install Python	Run aws configure to set up credentials	Create an S3 bucket	Install Docker	The aws configure command sets up access key, secret access key, and region, which are required for boto3 to authenticate with AWS services.
38	Unit 5: Basic Cloud Essentials for Developer	Lec2	Architecture	A customer wants to automate the deployment of their containerized application whenever code is pushed to GitHub. Which services should be involved?	Hard	1	D	S3 and DynamoDB	RDS and EC2	VPC and NAT Gateway	ECR for image storage and EC2 for deployment via CI/CD pipeline	A CI/CD pipeline builds Docker images, pushes them to ECR, then deploys to EC2 by pulling new images and restarting services.
39	Unit 5: Basic Cloud Essentials for Developer	Lec2	Problem Solving	A customer’s EC2 instance cannot be accessed via SSH from their local machine. What should they check first?	Medium	1	A	Security group inbound rules for SSH (port 22)	The instance type	The AMI version	The EBS volume size	Security groups must have inbound rules configured to allow SSH traffic (port 22) for remote access to EC2 instances.
40	Unit 5: Basic Cloud Essentials for Developer	Lec2	Service Selection	A customer needs to create vector embeddings for their documents and store them for semantic search. Which combination of services should they use?	Hard	1	B	EC2 and RDS	Bedrock Embeddings and S3 Vectors	Lambda and DynamoDB	ECS and ElastiCache	Bedrock Embeddings (like Cohere or Titan v2) create vector representations, and S3 Vectors provides scalable vector storage with indexing for semantic search.
41	Unit 5: Basic Cloud Essentials for Developer	Lec2	Problem Solving	A customer is getting “InvalidParameterValue” when creating an S3 Vectors index. They specified dataType as “int” and dimension as 1024. What is wrong?	Hard	1	C	The dimension is too large	The index name is invalid	The dataType should be “float32” not “int”	The bucket doesn’t exist	When creating an S3 Vectors index, the dataType parameter should be “float32” for vector embeddings, not “int”.
42	Unit 5: Basic Cloud Essentials for Developer	Lec2	Architecture	A customer wants to use temporary AWS credentials in their application. Which method should they use to set credentials?	Medium	1	D	Only ~/.aws/credentials file	Only aws configure	Only environment variables	Environment variables including AWS_SESSION_TOKEN	For temporary credentials, you can use export commands including AWS_SESSION_TOKEN in addition to access key and secret access key.
43	Unit 5: Basic Cloud Essentials for Developer	Lec2	Problem Solving	A customer deployed their application to EC2 but it cannot pull Docker images from ECR. What should they verify?	Hard	1	A	The EC2 instance has run aws ecr get-login-password and authenticated with Docker	The S3 bucket permissions	The DynamoDB table exists	The VPC has internet access only	To pull images from ECR, the EC2 instance must authenticate Docker with ECR using aws ecr get-login-password piped to docker login.
44	Unit 5: Basic Cloud Essentials for Developer	Lec2	Service Selection	A customer wants to query similar documents based on semantic meaning from their knowledge base. What feature of S3 Vectors should they use?	Medium	1	B	ListVectors	QueryVectors	GetVectors	PutVectors	The QueryVectors action in S3 Vectors enables semantic similarity search across the vector index based on query embeddings.
45	Unit 5: Basic Cloud Essentials for Developer	Lec2	Problem Solving	A customer’s boto3 code is connecting to the wrong AWS region. How can they specify the correct region in their code?	Medium	1	C	Only through aws configure	Only through environment variables	By passing region_name parameter to boto3.client()	By modifying the AWS SDK source code	The region_name parameter can be passed directly to boto3.client() to specify the AWS region, e.g., boto3.client(“s3vectors”, region_name=”ap-southeast-1”).
46	Unit 5: Basic Cloud Essentials for Developer	Lec1	Architecture	A customer is building a multi-agent system where agents need to cache frequently accessed embeddings for fast retrieval. Which service should they use?	Medium	1	A	Amazon DynamoDB	Amazon S3	Amazon RDS	Amazon ECR	DynamoDB is ideal for caching frequently accessed embeddings due to its low-latency access and automatic scaling based on traffic.
47	Unit 5: Basic Cloud Essentials for Developer	Lec1	Problem Solving	A customer wants their backend workers to process tasks asynchronously while the main orchestration server handles user requests. Which service hosts both components?	Medium	1	D	Amazon S3	Amazon DynamoDB	Amazon ECR	Amazon EC2	EC2 runs both agent orchestration servers and hosts background workers processing tasks, providing flexible compute for varying workloads.
48	Unit 5: Basic Cloud Essentials for Developer	Lec2	Problem Solving	A customer is trying to upload a file to S3 using boto3 but gets “NoSuchBucket” error. What should they verify?	Medium	1	B	The file exists locally	The bucket name is correct and the bucket exists	The IAM permissions	The region setting	The “NoSuchBucket” error indicates the specified bucket doesn’t exist. The customer should verify the bucket name is correct and the bucket has been created.
49	Unit 5: Basic Cloud Essentials for Developer	Lec2	Architecture	A customer wants to tag their Docker images with both “latest” and the git commit SHA for version tracking in ECR. Why is this a good practice?	Hard	1	C	It reduces storage costs	It improves image pull speed	It enables rollback to specific versions while maintaining a latest reference	It is required by ECR	Tagging with both latest and git SHA allows maintaining a latest reference for convenience while enabling rollback to specific versions using the commit SHA.
50	Unit 5: Basic Cloud Essentials for Developer	Lec1	Service Selection	A customer needs to store pgvector extensions for PostgreSQL-based vector search. Which service supports this?	Hard	1	A	Amazon RDS with PostgreSQL	Amazon DynamoDB	Amazon S3	Amazon ECR	RDS with PostgreSQL can store vector extensions like pgvector, enabling vector-based similarity search within a relational database.
51	Unit 5: Basic Cloud Essentials for Developer	Lec2	Problem Solving	A customer’s CI/CD pipeline fails when pushing to ECR with “denied: Your authorization token has expired”. What should they do?	Medium	1	B	Create a new ECR repository	Re-run aws ecr get-login-password to get a fresh token	Change the Docker image tag	Restart the EC2 instance	ECR authorization tokens expire, so the pipeline needs to re-authenticate by running aws ecr get-login-password before pushing images.
52	Unit 5: Basic Cloud Essentials for Developer	Lec1	Architecture	A customer is designing a system where agents need to track decision history for debugging and auditing. Which services should store this data?	Hard	1	D	S3 only	EC2 local storage	ECR	DynamoDB for quick access and RDS for audit trails	DynamoDB tracks agent decision history with low-latency access, while RDS maintains audit trails of agent actions with complex query capabilities.
53	Unit 5: Basic Cloud Essentials for Developer	Lec2	Problem Solving	A customer wants to list all available foundation models in Amazon Bedrock using Python. Which boto3 client method should they call?	Medium	1	A	bedrock_client.list_foundation_models()	bedrock_client.get_models()	bedrock_client.describe_models()	bedrock_client.show_models()	The list_foundation_models() method of the bedrock client returns a list of available Amazon Bedrock foundation models.
54	Unit 5: Basic Cloud Essentials for Developer	Lec2	Architecture	A customer wants to embed multiple documents in batch for their RAG system. Which BedrockEmbeddings method should they use?	Medium	1	C	embed_query()	embed_single()	embed_documents()	embed_batch()	The embed_documents() method of BedrockEmbeddings accepts a list of documents and returns embeddings for all of them.
55	Unit 5: Basic Cloud Essentials for Developer	Lec1	Problem Solving	A customer’s agents are making external API calls but the responses are slow due to network latency from the private subnet. What should they check?	Hard	1	B	The EC2 instance type	The NAT Gateway configuration and bandwidth	The S3 bucket region	The DynamoDB read capacity	NAT Gateway enables outbound connections from private subnets. Slow responses could indicate NAT Gateway bandwidth or configuration issues.
56	Unit 5: Basic Cloud Essentials for Developer	Lec2	Service Selection	A customer wants to use cosine similarity for comparing vectors in their semantic search system. Which parameter should they set when creating an S3 Vectors index?	Medium	1	D	dataType	dimension	indexName	distanceMetric	The distanceMetric parameter should be set to “cosine” when creating an S3 Vectors index for cosine similarity comparisons.
57	Unit 5: Basic Cloud Essentials for Developer	Lec1	Problem Solving	A customer’s multi-agent system needs to maintain temporary working memory for complex tasks. Which service is most appropriate?	Medium	1	A	Amazon DynamoDB	Amazon S3	Amazon RDS	Amazon ECR	DynamoDB manages temporary working memory for complex tasks due to its low-latency access and automatic scaling capabilities.
58	Unit 5: Basic Cloud Essentials for Developer	Lec2	Architecture	A customer deployed their application but environment variables with AWS credentials are not persisting after EC2 restart. What is a better approach?	Hard	1	C	Hardcode credentials in the application	Store credentials in S3	Use ~/.aws/credentials file or IAM roles for EC2	Store credentials in DynamoDB	The ~/.aws/credentials file persists credentials, or better yet, use IAM roles attached to EC2 instances for automatic credential management.
59	Unit 5: Basic Cloud Essentials for Developer	Lec2	Problem Solving	A customer is using ChatBedrockConverse and gets “ValidationException: Model not found”. What should they verify?	Hard	1	B	The AWS CLI version	The model_id is correct and the model is available in the specified region	The temperature parameter	The max_tokens parameter	The model_id must be a valid model identifier (e.g., “amazon.nova-lite-v1:0”) and the model must be available in the specified region_name.
60	Unit 5: Basic Cloud Essentials for Developer	Lec1	Service Selection	A customer wants to enable batch processing of large datasets for their RAG knowledge base. Which service should store the datasets?	Medium	1	A	Amazon S3	Amazon DynamoDB	Amazon ECR	Amazon VPC	S3 enables batch processing of large datasets and serves as a data lake for multi-agent knowledge, making it ideal for RAG knowledge bases.