Expressions and Operators – Exercises

Consider the scenario: You are creating a custom class that renames a given Account based on the provided old and new names. You have initialized the class but now you need to create an expression that checks if the old name is not equal to the new name.

Complete the following code fragment by filling in the blanks to create a conditional expression that checks if oldAccountName is not equal to newAccountName.

Imagine you’re creating a Salesforce application to manage books in a library. You want to store each book’s name and its unique ISBN number.

Fill in the blanks to create a new instance of a Book object, initializing it with a title “Apex Programming” and its ISBN as “1234567890”.

A Salesforce developer is working on a feature to rename files in a custom application. They’ve created a class named myRenamingClass that takes in the old file name and the new desired file name to perform the renaming.

Fill in the blanks below to instantiate this class for a file previously named “oldDocument.txt” and rename it to “newDocument.txt”:

You are working on a project where there is a need to create a map to store the relation between a company’s name and its yearly profit. Initialize the map and then add an entry for a company named “TechFirm” with a profit of 2 million (2000000).

Fill in the gaps:

You are tasked with creating a new list of Accounts. In this list, you want to add two specific account instances: one with the Name of ‘EnterpriseCorp’ and another with the Name of ‘StartupHub’.

Fill in the blanks to achieve this:

You are tasked with obtaining the primary email of a Contact object. In the past, to avoid null reference exceptions, you would check if the contact object and its email are not null. Convert the old way of checking for nulls into the new way using the safe navigation operator.

Fill in the blanks:

You’re working on a piece of code that extracts the address of a Contact object in Salesforce. You’re aware that sometimes the contact object or its getAddress() method could return null, and you want to safely navigate through these.

Complete the following lines of code:

You’re writing a piece of code where you need to extract the manager’s name from an Employee object. There’s a possibility that an employee might not have a manager assigned, or the manager object might not have the name populated. Use the safe navigation operator to handle these cases gracefully.

Fill in the blanks:

You’re given the task of retrieving an email from a Contact object in Salesforce. Not all contacts might have an email populated. Use the safe navigation operator to ensure you don’t run into null reference exceptions.

Complete the following:

As a developer, you’re building an approval workflow in Salesforce for invoice management. Before an invoice can be approved, its total amount must be less than or equal to the set budget limit.

Given an invoice amount of 500 and a budget limit of 750, fill in the blank to create the necessary condition for approval:

You are developing a login function for a custom Salesforce application. Users are only allowed to log in if they have an active status (isActive) and if their role is an “Admin” (userRole).

Complete the following conditional check:

You’re developing a function to evaluate performance scores of sales reps in your Salesforce instance. If the sales rep’s score is not the same as the benchmark score of 85, a debug message should indicate that the sales rep didn’t meet the benchmark.

Using the given variables, complete the conditional statement:

In your Salesforce application, there’s a feature to automatically send a feedback request to users if they haven’t provided feedback yet. To implement this, you have to check if the userFeedback variable is the same as the string ‘Not Given’.

Fill in the blank to achieve this:

You have a custom class VIPCustomer in your Salesforce Org. Given an object instance customerObj, you want to check if it’s an instance of the VIPCustomer class.

Complete the expression to perform this check.

You’re tracking the sales and refunds of a particular product. In one day, you sold 15 units of the product and had 5 units returned for a refund. Additionally, you gained an extra 10 units from another store’s stock.

Complete the expression to find out the final count of units you have after the transactions.

You are given a requirement where you must divide the total sales by the number of sales reps and then multiply it by a commission rate. The total sales are 5000, the number of sales reps is 4, and the commission rate is 10%.

Fill in the blanks with the correct operators:

You’re given an Apex snippet that negates a Boolean value indicating if an online store is open. Additionally, you want to convert a given string representation of a number into an integer.

Fill in the blanks to achieve this:

You are given an Apex snippet that calculates the total items in the cart. Each time a new item is added, you need to increase the counter. However, before any calculation, you want to reset the counter to zero.

Fill in the blanks to ensure this:

A customer initially buys a product for $50. Due to a special offer, the customer gets an opportunity to buy another of the same product at half its price.

Use the appropriate assignment operator to compute the new total cost for the customer:

A customer has a total bill of $100 at a bookstore. If a promotional discount of $15 is being offered for every purchase, adjust the customer’s total bill using the appropriate assignment operator:

You’re developing an application to manage inventory. At the end of every day, the remaining items in stock are reduced by half due to expiration.

If the initial stock of an item is 80 units, fill in the blank to adjust the stock value to represent the remaining items: