Introducing the exam The exam format consists of 60 multiple-choice questions, and candidates are given 105 minutes to complete the exam. The passing score that’s required at the time of writing is 58%, and there are no written prerequisites for the exam (although, as you will discover quite quickly, it is extremely challenging to dive […]

Comments Another common part of the code is called a comment. Because comments aren’t executable code, you can place them in many places. Comments can make your code easier to read. While the exam creators are trying to make the code harder to read, they still use comments to call attention to line numbers. We […]

CloudWatch and CloudWatch Metrics In the previous chapter, you looked at the different types of log files AWS can generate. This chapter will focus on the CloudWatch service. Amazon CloudWatch is the leading monitoring service used in AWS and cloud data and metrics from all supported AWS services. It allows you to gain a better […]

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 […]