Variables - Exercises - ForceWise - Salesforce Study Lessons, Practice Exams and more

Question 1 of 23

1. Question

You are building a Salesforce Apex utility class and you need to declare several variables: a boolean to determine if a user is active, an integer for the user’s age, and a map to relate Account IDs to Account Names.

isActiveUser = true;
userAge = 25;
Map< , > accountIdToName;

Question 2 of 23

2. Question

In a Salesforce Apex class, you’re tasked with declaring a variable that can hold decimal values for storing product prices. Additionally, declare a string variable to store the product name and a list to store all product categories.

price = 19.99;
productName;
List< > productCategories;

Question 3 of 23

3. Question

In an e-commerce system, you need to declare several variables: one to hold the product’s unique code, another to determine if a product is available in stock, and a set to store all unique tags associated with a product.

productCode;
isInStock = false;
Set< > productTags;

Question 4 of 23

4. Question

You’re developing a system for a school, and you need to declare certain variables. The first one should keep track of the total number of students in a class. The second variable should store the name of the class teacher, and the third one, a list of all subjects taught in the class.

totalStudents = 30;
classTeacherName;
List< > subjects;

Question 5 of 23

5. Question

You’re creating an e-commerce application and need to track products. Declare two variables: one to determine if the product is on sale and another to represent the discount rate applied to that product. The discount rate might be a percentage with decimal values, such as 10.5%.

isOnSale = true;
discountRate;

Question 6 of 23

6. Question

You are developing a form for user registration. Declare two variables: one to hold the user’s email address and another to check if the user has opted to receive newsletters.

userEmail;
optedForNewsletter = false;

Question 7 of 23

7. Question

Your application needs to track if a customer has opted into a newsletter. If their preference isn’t known, the system should not default to any value, leaving it undefined. Fill in the blanks to declare the variable that tracks this information:

hasOptedNewsletter = ;

Question 8 of 23

8. Question

You are developing an application to track the bonus amount earned by employees. If no bonus is provided, it should be explicitly indicated as null until a value is assigned. Fill in the blanks to declare a variable to store the bonus amount:

bonusAmount = ;

Question 9 of 23

9. Question

You are developing a CRM system and need to capture the middle name of a user. However, not all users might have a middle name. Declare a variable to hold the middle name and ensure it does not have an initial value.

middleName = ;

Question 10 of 23

10. Question

You are tasked with developing a system to track student enrollment dates for an online course. Initially, when a student account is created, the enrollment date is not set.

Fill in the blanks to declare the enrollment date variable and then, if the enrollment date is not set, assign today’s date as the default:

enrollmentDate;
if(enrollmentDate == ) {
enrollmentDate = .today();
}

Question 11 of 23

11. Question

You’re building an application to manage event schedules. An event is planned, but the exact date hasn’t been set yet. However, you know that the event will likely happen 10 days before a known deadline. Fill in the blanks to declare the event date variable and calculate the tentative event date:

eventDate;
Date deadline = Date.today().addDays(20);
eventDate = deadline. (-10);

Question 12 of 23

12. Question

You’re creating a CRM system, and you want to keep track of the last contact date with a customer. When a new customer is added, this date is undefined. Later, you want to add 30 days to the last contact date if it has been defined.

Fill in the blanks to achieve this:

lastContactDate;
if(lastContactDate != ) {
lastContactDate = lastContactDate. (30);
}

Question 13 of 23

13. Question

You’re building a system to manage the release dates of software patches. For a new software patch, the release date might not be immediately decided. However, once you have a release date, you might want to delay it by 7 days if necessary.

Fill in the blanks to achieve this:

releaseDate;
if(releaseDate != ) {
releaseDate = releaseDate. (7);
}

Question 14 of 23

14. Question

You are developing a reservation system for a hotel. When a reservation is first made, the check-in date is yet to be determined. Fill in the blanks to declare the check-in date variable and then, if the check-in date hasn’t been specified, set it to tomorrow’s date:

checkInDate;
if(checkInDate == ) {
checkInDate = .today(). (1);
}

Question 15 of 23

15. Question

You are building an app to track whether a light in a smart home system is turned on or off. The default status of the light is off.

Fill in the blanks to declare the necessary variables and change the status if it hasn’t been set:

Boolean lightStatus = ;
lightChanged;
if(lightChanged == ) {
lightStatus = ;
}

Question 16 of 23

16. Question

You are coding a system to track student scores in a quiz. Every student starts with a score of 0. However, bonus marks can be added for exceptional performance. Complete the blanks to declare the required variables and assign bonus marks if they haven’t been already set:

score = 0;
bonus;
if( == ) {
bonus = 5;
}

Question 17 of 23

17. Question

You are developing an application for a simple quiz. The user’s score starts at 0. The number of questions the user has answered hasn’t been registered yet, and the total questions in the quiz are set to 1. Also, a flag is needed to check if the user has started the quiz or not, but that flag isn’t set initially. Fill in the blanks to declare these variables:

userScore = 0;
answeredQuestions;
totalQuestions = ;
hasStartedQuiz;

Question 18 of 23

18. Question

Fill in the blanks to ensure correct variable declaration and scope in the provided code:

public class VariableExample2 {
     m = 15;
    public void sampleMethod() {
        if(m > 10) {
             n = m – 5;
            System.debug(n);
        }
         o = 20;
        System.debug(o);
    }
}

Question 19 of 23

19. Question

Given the below code snippet, fill in the blanks to ensure that the variables are correctly defined and scoped without any conflicts:

public class VariableExample1 {
     classVariable = 25;

    public void functionOne() {
         localVariable = classVariable + 5;
        System.debug(localVariable);
    }

    public void functionTwo() {
        for( k = 0; k < 10; k++) {
            System.debug(k);
        }
    }
}

Question 20 of 23

20. Question

Given a need to store and manage data about a product’s price within a Salesforce Apex class, fill in the blanks to declare variables correctly ensuring the right scope is followed:

public class ProductPriceManager {
     productPrice = 100;

    public void discountCalculator() {
         discountAmount = 10;
         discountedPrice = productPrice – discountAmount;
        System.debug(‘Discounted Price: ‘ + discountedPrice);
    }

    public void taxCalculator() {
         taxRate = 0.05;
         taxAmount = productPrice * taxRate;
        System.debug(‘Tax Amount: ‘ + taxAmount);
    }
}

Question 21 of 23

21. Question

Consider a scenario where an Apex class manages user roles. Fill in the blanks to define variables with proper scope:

public class UserRoleManager {
     defaultRole = ‘Guest’;

    public void assignUserRole(String username) {
         userRole;
        if(username != null) {
             roleAssignment = ‘Assigned’;
            userRole = defaultRole;
            System.debug(username + ‘ is ‘ + roleAssignment + ‘ the role: ‘ + userRole);
        }
    }
}

Question 22 of 23

22. Question

Imagine you are developing an Apex class that monitors the battery level of devices. Fill in the blanks to correctly define and use the variables:

public class BatteryMonitor {
     deviceName = ‘Laptop’;

    public void batteryLevelLow() {
         batteryLevel = 10;
         alertMessage = deviceName + ‘ battery is at ‘ + batteryLevel + ‘%’;
        System.debug(alertMessage);
    }

    public void batteryLevelHigh() {
         batteryPercentage = 90;
        System.debug(deviceName + ‘ battery is at ‘ + batteryPercentage + ‘%’);
    }
}

Question 23 of 23

23. Question

Suppose you are writing an Apex class that calculates an employee’s salary after considering bonuses.

Fill in the blanks to ensure variables are declared appropriately:

public class SalaryCalculator {
     baseSalary = 50000;

    public void calculateBonus() {
         bonusPercentage = 0.1;
         totalSalary = baseSalary + (baseSalary * bonusPercentage);
        System.debug(‘Total Salary after bonus: ‘ + totalSalary);
    }

    public void calculateDeductions() {
         deduction = 1000;
         netSalary = baseSalary – deduction;
        System.debug(‘Net Salary after deduction: ‘ + netSalary);
    }
}

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