SALESFORCE-PD1 Developer Fundamentals Practice Question
A developer needs to check if a specific key exists in a Map<String, Decimal> before retrieving its value. Which Map method should be used?
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
✓
containsKey()
The containsKey() method checks whether a specified key exists in a Map instance.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
containsKey()
Why this is correct
containsKey() checks for the presence of a key and returns a boolean value.
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hasKey()
Why it's wrong here
hasKey() is not a valid Apex Map method.
- ✗
contains()
Why it's wrong here
Maps do not have a contains() method; that method is used on lists and sets.
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exists()
Why it's wrong here
exists() is not a valid method on Apex collections.
About these practice questions
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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.