Data Types – Exercises

You are working on a feature that requires the conversion of a text string into a binary format for encryption purposes. You need to convert the string 'HelloWorld' into a Blob object. Complete the following line of code:

You have received binary data from an external system, and you need to save it into a Blob variable named incomingData. Fill in the blank to correctly type and initialize the variable.

You are creating a new Apex class to determine if a customer has reached their credit limit. You want to store this determination in a simple true or false value.

Complete the following code snippet:

In your Apex class, you are given a method that returns whether a user has admin rights. You need to store the returned value for further processing.

Complete the code snippet below:

You’re developing an Apex class to track the start date of a training session. You want to initialize this date to the current date.

Fill in the blanks to correctly declare and initialize this date variable:

Your company wants to provide a special offer to customers on a specific launch date. You need to manually set this date to the 1st of January, 2024.

Complete the code snippet below:

You’re developing a tracking tool within Salesforce, and you want to record the exact time and date a user completes a certain task. To do so, you need to initialize a variable to the current date and time.

Fill in the blanks to correctly declare and initialize this datetime variable:

You’re writing a function in Apex to schedule a maintenance operation that is set to occur on 5th of February, 2024, at 10:30 AM.

Complete the code snippet below:

You are developing a finance application in Salesforce. One of your tasks is to store the exchange rate for USD to EUR. You want to use a data type that can handle fractional values.

Fill in the blanks to correctly declare and initialize this variable with a sample rate of 0.85:

You are designing a simple Apex method to capture the discount percentage offered on a product. To store this percentage value, which can be something like 5.5% or 10.75%, you need to declare a variable.

Fill in the blanks to correctly declare this variable with an initial value of 5.5:

You are tasked with developing a weather application in Salesforce. For a particular feature, you need to store the average rainfall, which can have decimal values like 2.35 inches or 0.78 inches.

Fill in the blanks to correctly declare this variable with a sample value of 2.35:

You are developing a fitness application in Salesforce. For tracking user progress, you need to record the distance they run each day, which might be values like 5.7 kilometers or 2.9 kilometers.

Fill in the blanks to correctly declare this variable with an initial value of 5.7:

You’re given a task to create a variable to store the opening time of a shop. The shop opens at 10:30 AM. Create a variable named shopOpeningTime to store this time.

As part of a scheduling application, you need to store the end time for a lunch break. The break ends at 1:45 PM. Create a variable named lunchBreakEndTime to store this time.

A junior developer wants to check if a given Object variable, named unknownData, holds a String value. Fill in the blank to complete the Apex code that checks this condition:

A developer needs to declare an Object variable in Apex that can store any type of data. The developer chooses the variable name genericStorage. Complete the following Apex code to declare the genericStorage variable:

You are given a task where you need to assign a lead’s ID to a variable and later convert this ID to a string for some string manipulations. Fill in the blanks to correctly assign the lead ID and then convert it to a string:

A beginner developer is designing a function to accept the ID of an Account record. The developer starts writing the function but leaves a placeholder for the data type. Complete the Apex code by filling in the placeholder:

A trainee developer is building a functionality to calculate the age of a user based on their birth year. They have the current year and birth year stored in integer variables. Fill in the blanks to correctly calculate the age:

A developer is creating an Apex function to handle registration for a workshop. Each workshop can handle a maximum of 30 participants. The developer wants to declare a constant variable for this maximum limit. Fill in the blanks to correctly declare this constant:

A junior developer needs to calculate the average score of students after a test. They already have variables declared for totalScore and numberOfStudents. Fill in the blanks to correctly calculate the average score and store it in a variable named averageScore:

A trainee developer is working on a function to format the display name of a user in the format “LastName, FirstName”. They have two string variables, fName for the first name and lName for the last name. Fill in the blanks to create the formatted display name:

A developer is building an Apex function to generate greetings based on user names. They need to declare a variable that will store this greeting message. Fill in the blanks to correctly declare the greetingMessage variable with the initial content of “Hello”:

A junior developer is creating an application to record the number of files uploaded to a cloud storage platform over many years. The file count is expected to be significantly large. They’ve been advised to use the Long data type to capture this data. They currently have a value in currentFileUploadCount and need to add 3 million to it. Assist them in filling in the blanks:

A novice developer is building a system to keep track of the number of digital books downloaded from an online library since its inception. Given the platform’s vast content and global reach, the count can be tremendous. They’ve commenced with the Long data type for this task. Help them adjust the count by adding 2.5 million books to the existing count: