QUESTION: 5

A client is using IBM Cloud Schematics to build Infrastructure as Code using a declarative approach.
When using this approach, what does the declarative approach define?

Future state
End state or desired state
Declarative state
Start state

Answer(s): B

Explanation:

In Infrastructure as Code (IaC) using IBM Cloud Schematics, a declarative approach defines the "end state" or "desired state" of the infrastructure.

Declarative Approach: In the declarative model, you specify the final desired state of the infrastructure you want, and the IaC tool (IBM Cloud Schematics in this case) takes the responsibility of determining the sequence of steps necessary to achieve that state. This is opposed to an imperative approach, where you explicitly define each step required to reach the desired outcome.

IBM Cloud Schematics: IBM Cloud Schematics is a tool that allows users to define their infrastructure and services as code using Terraform. In a declarative approach, the user creates Terraform configuration files that describe the desired state of all resources, like VMs, networks, databases, etc. Schematics then reconciles the current state with the desired state by applying the appropriate changes.

Reference from IBM Cloud Professional Architect Materials:

According to IBM documentation on IBM Cloud Schematics, it focuses on defining the desired state (end state) of the resources. This is a fundamental concept of Infrastructure as Code (IaC) and the declarative approach in cloud computing.

The other options do not accurately describe the declarative approach:

A . Future state is too vague and not a recognized term in the context of IaC.

C . Declarative state is not a defined term in the IaC context.

D . Start state refers to the initial configuration, not the desired outcome.

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QUESTION: 6

Which IBM Cloud database service supports both relational and non-relational data querying?

Databases for Redis
Databases for Db2
Databases for PostgreSQL
Databases for etcd

Answer(s): B

Explanation:

Databases for Db2 is an IBM Cloud database service that supports both relational and non-relational data querying.

IBM Cloud Databases for Db2: Db2 on IBM Cloud is a managed database service that supports both relational and non-relational models. It provides JSON and SQL querying capabilities, allowing users to store and retrieve data in a flexible manner. This makes it capable of handling structured, semi- structured, and unstructured data, thus supporting both relational and non-relational data formats.

Support for Multiple Data Types: Db2's multi-model database capabilities enable the execution of SQL queries on relational data and the storage/retrieval of JSON documents, effectively allowing it to function in both relational and non-relational scenarios.

Reference from IBM Cloud Professional Architect Materials:

According to IBM's documentation on IBM Cloud Databases for Db2, it supports a broad range of workloads and use cases, including transactional (relational) and operational (non-relational) workloads, making it suitable for both SQL and NoSQL data models.

The other options are incorrect because:

A . Databases for Redis is a key-value store optimized for in-memory data.

C . Databases for PostgreSQL is strictly a relational database.

D . Databases for etcd is a key-value store primarily used for configuration management.

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QUESTION: 7

What is the main advantage of using IBM Code Engine over traditional server provisioning?

Lower latency
Better load balancing
Higher security
Greater scalability

Answer(s): D

Explanation:

The main advantage of using IBM Code Engine over traditional server provisioning is greater scalability.

IBM Code Engine: It is a fully managed, serverless platform that automatically scales up or down based on the workload demand. Unlike traditional server provisioning, which requires manual configuration and scaling of resources, IBM Code Engine dynamically adjusts the compute capacity, allowing applications to handle variable loads efficiently.

Scalability Advantage: IBM Code Engine's serverless architecture eliminates the need for pre- provisioning servers, thus avoiding over-provisioning or under-provisioning issues. It can automatically scale from zero to thousands of instances based on demand, making it highly efficient for scaling applications.

Reference from IBM Cloud Professional Architect Materials:

According to IBM documentation on IBM Code Engine, it provides a serverless experience with automatic scaling, where the platform handles all the provisioning, scaling, and management of resources.

The other options are incorrect:

A . Lower latency may be a benefit, but it's not the main advantage.

B . Better load balancing is part of scalability but not the primary advantage over traditional provisioning.

C . Higher security could be a benefit but isn't specific to IBM Code Engine's main advantage over server provisioning.

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QUESTION: 8

What is used to configure virtual server instances (VSIs) with user data?

cloud-init
cloud-config
server-config
user-data

Answer(s): A

Explanation:

cloud-init is a widely used tool in IBM Cloud for initializing virtual server instances (VSIs) with user data. It allows users to provide configuration instructions or scripts that are executed when a new virtual server is created. cloud-init is highly versatile and supports a variety of use cases, such as installing software packages, setting up the environment, and managing users.

What is cloud-init? It is a standard method for cloud instance initialization in many cloud environments, including IBM Cloud. cloud-init reads the user data provided during the instance's launch and executes the required configurations, allowing for automated setup and customization.

Why use cloud-init? It enables users to automate the bootstrapping process of virtual servers by defining configurations that can range from simple commands to complex scripts. This reduces manual intervention, saves time, and ensures consistency in server setups.

Relationship with Other Options:

cloud-config (B) is a YAML file format used by cloud-init for providing configuration details. However, the term cloud-init refers to the actual tool used to process the user data.

server-config (C) and user-data (D) are not specific tools but terms that might describe parts of the cloud-init process.

Reference:

IBM Cloud Virtual Servers Documentation

IBM Cloud Architect Exam Study Guide cloud-init Official Documentation

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