The final operator you should be familiar with for the exam is the conditional operator, The first operand must be a boolean expression, and the second and third operands can be any expression that returns a value. The ternary operation is really a condensed form of a combined if and else statement that returns a […]

9.4 @TestSetup Method Here’s an example that demonstrates the usage of @TestSetup: @isTest private class ContactTriggerTest { @TestSetup static void setupTestData() { // Create a test account Account testAccount = new Account(Name = ‘Test Account’); insert testAccount; // Create a test contact without setting standard field values Contact testContactWithoutValues = new Contact( FirstName = ‘John’, […]

AWS Budgets and Billing Alarms In the third step, you can set up alerts. These alerts can be used to notify you if you are getting close to your budget maximum. Alerts can be either mailed to individuals, sent via Amazon SNS (Simple Notification Service, which can be used as a text-messaging service), or via […]

Transmitting Data Using Twisted Pairs While it is true that Ethernet sends data over UTP cables, the physical means to send the data uses electricity that flows over the wires inside the UTP cable. To better understand how Ethernet sends data using electricity, break the idea down into two parts: how to create an electrical […]

Internet Group Management Protocol IGMPv3 includes the following key changes from IGMPv2: IGMPv3 supports source-specific multicast (SSM), which builds shortest path trees from each receiver to the source, through the following features: Host messages that can specify both the group and the source. The multicast state that is maintained for groups and sources, not just […]

10.1 Salesforce Environments Developer Pro Sandbox A Developer Pro Sandbox is a dedicated environment for individual developers or small teams. It provides a separate space for development and testing, allowing developers to work independently without affecting other developers’ work. It is typically used for individual development and testing tasks, such as building new features, debugging […]

SageMaker Debugger In this section, you will learn about Amazon SageMaker Debugger, unraveling the intricacies of monitoring, profiling, and debugging ML model training: In a nutshell, Amazon SageMaker Debugger emerges as a holistic toolkit, empowering you to monitor, profile, and debug your ML models with finesse. It’s not just a tool; it’s your ally in […]

Creating a VPC Endpoint Generally, traffic traveling to the Amazon S3 service would use the public internet to get to its destination. If this had originated from an EC2 instance from within your VPC, then this route could take an IGW if the instance was in a public subnet or a NAT gateway if it […]

Consistent Behavior over All Links Using the Ethernet Data-Link Layer Although Ethernet includes many physical layer standards, Ethernet acts like a single LAN technology because it uses the same data-link layer standard over all types of Ethernet physical links. That standard defines a common Ethernet header and trailer. (As a reminder, the header and trailer […]

Multicast The IP communication traditionally defines the unicast communication, when there is a host to host communication, or 1:1, and the broadcast type of communication where one host sends to all other hosts. When there is the need to communicate with multiple, but not all, hosts the broadcast communication is not effective as all hosts […]