Tech Skills Assessment

What is the main purpose of Java's garbage collection?

• To automatically manage memory and reclaim unused objects.

• To provide a mechanism for user-defined memory management.

• To optimize CPU usage during program execution.

• To enhance the performance of Java applications.

How does Kafka ensure message durability?

• Kafka stores messages only in memory for quick access.

• Kafka writes messages to disk, replicates them, and uses acknowledgments for durability.

• Kafka relies solely on client-side storage for message durability.

• Kafka uses a single broker to handle all messages without replication.

What is the primary service used for serverless computing in AWS?

• AWS Lambda

• AWS S3

• AWS EC2

• AWS RDS

Explain the difference between IaaS, PaaS, and SaaS in cloud computing.

• IaaS and PaaS are the same, while SaaS is a type of IaaS.

• IaaS is only for storage, PaaS is for networking, and SaaS is for hardware management.

• IaaS is a software application, PaaS is for infrastructure, and SaaS is a platform for development.

• IaaS provides infrastructure, PaaS provides a platform for development, and SaaS delivers software applications.

What is the role of a broker in a Kafka architecture?

• A broker is responsible for monitoring consumer performance.

• A broker stores and manages data streams, receiving messages from producers and serving them to consumers.

• A broker encrypts messages before they are sent to producers.

• A broker only produces messages to the Kafka topic.

How can you implement machine learning models in AWS?

• Deploy models using Amazon EC2 instances manually.

• Use AWS Lambda for real-time data processing.

• Utilize Amazon RDS for model training and storage.

• Use Amazon SageMaker for building, training, and deploying machine learning models.

What is the significance of the 'final' keyword in Java?

• The 'final' keyword enables multiple inheritance in Java.

• The 'final' keyword is used to declare abstract classes.

• The 'final' keyword in Java signifies that a variable's value cannot be changed, a method cannot be overridden, and a class cannot be inherited.

• The 'final' keyword allows a variable to be reassigned.

Describe the concept of topics in Kafka.

• A topic in Kafka is a configuration setting that controls message retention.

• A topic in Kafka is a named stream of records, partitioned for scalability, where producers publish data and consumers read from.

• A topic in Kafka is a database table where data is stored permanently.

• A topic in Kafka is a type of consumer that processes records.

What AWS service is commonly used for data storage?

• Amazon Lambda

• Amazon RDS

• Amazon S3

• Amazon EC2

How does AI differ from traditional programming?

• AI requires no data to function.

• Traditional programming can learn from data.

• AI is only used for data storage.

• AI learns from data and adapts, whereas traditional programming follows fixed rules.