Review Questions The following questions are designed to test your understanding of this chapter’s material. For more information on how to obtain additional questions, please see this book’s introduction.

Enum: An enum in Salesforce Apex is an abstract data type that allows you to define a set of values that an identifier can take on. Each value in the enum is given a unique identifier, and you can use these identifiers to reference the values in your code. Enums are used to define a […]

Exam Essentials Know CloudWatch in detail. CloudWatch is the key service in the AWS logging and monitoring suite of services. Know that it is a metric and logging collection service that has many additional utilities to manage, monitor, gain insights, and store the collected data. AWS and external applications export log and metric data into […]

Dimensionality reduction Another unsupervised algorithm that was implemented by AWS in its list of built-in algorithms is known as principal component analysis, or PCA for short. PCA is a technique that’s used to reduce the number of variables/dimensions in a dataset. The main idea behind PCA is plotting the data points to another set of […]

Application Insights Application Insights is an AWS managed service that can automatically perform discovery on resources and workloads that it supports. After the discovery process is completed, the service will configure a CloudWatch agent, alarms, metrics, and logs based on AWS best practices. The service helps you identify issues and resolve problems with your applications, […]

4.3  Variables Data Types As the data types of variables in Apex are generally strongly typed, you must declare the data type when you declare a variable. Declaring a variable means defining a container for holding data. When you declare a variable, you are essentially creating a named storage location in the computer’s memory. In […]

CloudTrail Lake AWS CloudTrail Lake is a solution that helps you store and analyze AWS CloudTrail data at a much larger scale instead of dealing with a single trail at a time. It uses Amazon S3, Amazon Athena, and AWS Glue to create a data lake that can store CloudTrail logs for an extended period […]

Baseline Network Performance Baseline data collected from monitoring metrics and logs are used to understand your usage over time and to create a performance baseline. Baselines can help you understand what is considered a normal usage pattern. When the tracking data exceeds the baseline metrics, you will have visibility into what is out of range […]

Trusted Advisor AWS Trusted Advisor is a tool that performs checks on five different categories: Cost optimization Performance Security Fault tolerance Service limits For security and compliance, you should focus on the Security checks. When you go to the Trusted Advisor, you can click the Refresh All Checks button to see whether the Trusted Advisor has […]

Establishing a Business Continuity Plan It may sound obvious, but every measure you take to protect your workload against a disaster should be carefully considered and planned accordingly. First, these measures will have a significant impact on your solution design. Second, the cost of your solution will increase with the degree of protection against a […]