SALESFORCE-PD1 Developer Fundamentals Practice Question
A developer needs to convert a string variable containing an alphanumeric Salesforce ID into an ID primitive data type. Which approach is valid in Apex?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Id myId = myString;
Passing a string to the Id constructor (Id myId = (Id)myString; or Id myId = myString;) automatically casts or converts valid string IDs to the Id type.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Id myId = String.toId(myString);
Why it's wrong here
String does not have a toId() method.
- ✗
Id myId = Id.valueOf(myString);
Why it's wrong here
Id has a constructor that accepts strings directly, but valueOf is not a standard method on the Id class.
- ✓
Id myId = myString;
Why this is correct
Strings containing valid 15-character or 18-character Salesforce IDs can be assigned directly to Id variables.
- ✗
Id myId = Integer.valueOf(myString);
Why it's wrong here
Salesforce IDs are alphanumeric and cannot be converted using Integer.valueOf.
About these practice questions
One of 488 original SALESFORCE-PD1 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Salesforce exam blueprint
This SALESFORCE-PD1 practice question is part of Courseiva's free Salesforce certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SALESFORCE-PD1 exam.