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DEX-450 PDF Practice Q&A's

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  • Total Questions: 202
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What is the duration, language, and format of Salesforce DEX-450 Exam

  • Certification Validity period : 3 years.
  • This exam consists of 85 questions
  • Passing score 80%
  • There is a time limit of 120 minutes for the exam.
  • The type of questions is Multiple Choice and situation-based questions.
  • This exam is offered in only English.

The validity of the Salesforce DEX-450 certification is three years.

A good Salesforce certification must be supported by a good DEX-450 exam practice, which will greatly improve your learning ability and effectiveness. Our study materials have the advantage of short time, high speed and high pass rate. You only take 20 to 30 hours to practice our DEX-450 guide materials: Programmatic Development using Apex and Visualforce in Lightning Experience and then you can take the exam. If you use our study materials, you can get the Salesforce certification by spending very little time and energy reviewing and preparing.

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Who should take the Salesforce DEX-450 Exam

This course is designed for programme developers starting on the Salesforce platform who require programming customizations on Apex and Visualforce business logic as well as on user interface layers. There are no prerequisites for Salesforce DEX-450 Exam.

  • Programmatic developers.

How to book the Salesforce DEX-450 Exam

There are the following steps for registering the Salesforce DEX-450 exam:

Step 1: Visit Salesforce Exam Registration Step 2: Signup/Login to Salesforce account Step 4: Select Date, time and confirm with the payment method

Reference: https://trailhead.salesforce.com/en/academy/classes/dex450-build-applications-programmatically-on-the-salesforce-platform/

Salesforce DEX-450 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Apex Transaction Management10%- Governor Limits
  • 1. DML statement limits
  • 2. SOQL query limits
  • 3. CPU time and heap size limits
- Transaction Control
  • 1. Database methods with allOrNone parameter
  • 2. System.debug() usage
  • 3. Savepoint and rollback
Topic 2: Apex Testing13%- Testing Best Practices
  • 1. Using seeAllData=false for isolated tests
  • 2. Assert statement usage
  • 3. Coverage requirements (75% for deployment)
- Test Classes
  • 1. @isTest annotation
  • 2. Test data creation methods
  • 3. Test.startTest() and Test.stopTest()
Topic 3: Apex Fundamentals10%- Apex Primitives
  • 1. Date, Datetime, Time classes
  • 2. Integer, Double, Long, String, Boolean types
  • 3. ID and sObject types
- Apex Basics
  • 1. Apex variables and data types
  • 2. Using SOQL to query Salesforce data
  • 3. Apex operators and control flow statements
  • 4. DML operations (insert, update, delete, etc.)
Topic 4: Visualforce Pages8%- VF Page Basics
  • 1. component structure
  • 2. Visualforce expressions
  • 3. Controllers and controller extensions
- VF Standard Components
  • 1. ,
  • 2. Action methods and pageReference
  • 3. , ,
Topic 5: Asynchronous Apex10%- Batch Apex
  • 1. Database.Batchable interface
  • 2. start(), execute(), and finish() methods
  • 3. Database.Stateful
- Future Methods
  • 1. @future annotation
  • 2. AsyncRequestLimit exceeded handling
Topic 6: Apex Classes and Interfaces12%- Apex Classes
  • 1. Access modifiers (public, private, protected, global)
  • 2. Class structure (attributes, methods, constructors)
  • 3. Inheritance and virtual/abstract classes
- Apex Interfaces
  • 1. When to use interfaces
  • 2. Interface definition and implementation
Topic 7: Working with Data - SOQL and SOSL15%- SOSL (Salesforce Object Search Language)
  • 1. SOSL syntax and use cases
  • 2. Returning sObjects from SOSL
- SOQL (Salesforce Object Query Language)
  • 1. Query options (LIMIT, ORDER BY, WHERE)
  • 2. Relationship queries (parent-child, child-parent)
  • 3. Basic SOQL queries
  • 4. Aggregate functions (COUNT, SUM, AVG, MIN, MAX)
Topic 8: Apex Triggers12%- Trigger Syntax and Context Variables
  • 1. Trigger events (before insert, after insert, etc.)
  • 2. Trigger.old and Trigger.new context variables
  • 3. Trigger.newMap and Trigger.oldMap
- Trigger Best Practices
  • 1. One trigger per object pattern
  • 2. Handler class patterns
  • 3. Recursive trigger prevention

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