DEX-450 Exam Questions & Answers

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DEX-450 Exam Questions & Answers

Vendor: Salesforce

Certifications: Salesforce Developer

Exam Code: DEX-450

Exam Name: Programmatic Development using Apex and Visualforce in Lightning

Updated: Jun 29, 2022

Q&As: 456

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DEX-450 Online Practice Questions and Answers

Questions 1

Given:

Map accountMap = new Map>ID, Account> ([SELECT Id, Name FROM Account]);

What are three valid Apex loop structures for iterating through items in the collection? (Choose three.)

A. for (ID accountID : accountMap.keySet()) {...}

B. for (Account accountRecord : accountMap.values()) {...}

C. for (Integer i=0; I < accountMap.size(); i++) {...}

D. for (ID accountID : accountMap) {...}

E. for (Account accountRecord : accountMap.keySet()) {...}

Show Answer
Questions 2

Requirements state that a child record be to deleted when its parent is deleted, and a child can be moved to a different parent when necessary. Which type of relationship should be built between the parent and child objects in Schema Builder to support these requirements?

A. Lookup Relathionship from to child to the parent

B. Child relationship

C. Master-Detail relationship

D. Lookup Relathionship from to parent to the child

Show Answer
Questions 3

A developer must create a CreditcardPayment class that provides an implementation of an existing Payment class. Public virtual class Payment { public virtual void makePayment(Decimal amount) { /*implementation*/ } }

Which is the correct implementation?

A. Public class CreditcardPayment extends Payment { public override void makePayment(Decimal amount) { /*implementation*/ } }

B. Public class CreditCardPayment implements Payment { public virtual void makePayment(Decimal amount) { /*implementation*/ } }

C. Public class CreditCardPayment extends Payment { public virtual void makePayment(Decimal amount) { /*implementation*/ } }

D. Public class CreditCardPayment implements Payment { public override void makePayment(Decimal amount) { /*Implementation*/ } }

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