Measured data
Salesforce Certified JavaScript Developer I
We scored 60 real Salesforce Certified JavaScript Developer I exam questions 1-10 on question complexity and broke the result down by exam domain.
- 60 questions scored
- 7 domains
- 1.9/10 overall complexity
certilumComplexity by exam domain
Higher scores mean more demanding question formats. The exam score is computed over the whole bank, not averaged across domains.
- Asynchronous Programming8 questions · complexity 2.0/10 · Gentle
38% multi-select · 0% scenario · 25% interactive
- Browsers and Events10 questions · complexity 1.8/10 · Gentle
30% multi-select · 0% scenario · 30% interactive
- Debugging and Error Handling4 questions · complexity 1.8/10 · Gentle
25% multi-select · 0% scenario · 25% interactive
- Objects, Functions, and Classes15 questions · complexity 2.0/10 · Gentle
33% multi-select · 0% scenario · 33% interactive
- Server-side JavaScript5 questions · complexity 2.0/10 · Gentle
40% multi-select · 0% scenario · 20% interactive
- Testing4 questions · complexity 1.5/10 · Gentle
25% multi-select · 0% scenario · 25% interactive
- Variables, Types, and Collections14 questions · complexity 2.0/10 · Gentle
36% multi-select · 0% scenario · 29% interactive
Full per-domain breakdown
Blueprint weight, bank size and question format mix for every domain of the exam.
| Domain | Blueprint | Questions | Single | Multi | Interactive | Complexity |
|---|---|---|---|---|---|---|
| Asynchronous Programming | 13% | 8 | 3 | 3 | 2 | 2.0/10Gentle |
| Browsers and Events | 17% | 10 | 4 | 3 | 3 | 1.8/10Gentle |
| Debugging and Error Handling | 7% | 4 | 2 | 1 | 1 | 1.8/10Gentle |
| Objects, Functions, and Classes | 25% | 15 | 5 | 5 | 5 | 2.0/10Gentle |
| Server-side JavaScript | 8% | 5 | 2 | 2 | 1 | 2.0/10Gentle |
| Testing | 7% | 4 | 2 | 1 | 1 | 1.5/10Gentle |
| Variables, Types, and Collections | 23% | 14 | 5 | 5 | 4 | 2.0/10Gentle |
How the score is calculated
The formula is fixed and public, so anyone can reproduce these numbers from the same bank.
Every question in the Salesforce Certified JavaScript Developer I bank is measured on four signals that can be read directly from the database. Each signal is expressed as a share of the questions in the domain, and the four shares are combined with fixed weights:
- Multi-select questions (40% weight). Items with more than one correct answer. The candidate has to find all of them, which is the single hardest format in the bank.
- Scenario questions (30% weight). Questions longer than 150 characters, which describe a situation instead of a definition and therefore test reasoning rather than recall.
- Interactive questions (20% weight). Items that require reading code or a configuration snippet.
- Deep explanations (10% weight). Questions whose explanation runs past 300 characters, which signals a concept with real nuance behind it.
The combined share is multiplied by ten to produce a 1-10 score. The exam-level score is computed over the whole bank rather than averaged across domains, so a small domain cannot distort the total. Figures on this page are recomputed from the live bank on every crawl.
Data set: Certilum Salesforce Certified JavaScript Developer I Foundation question bank, 60 questions, 7 domains. Published by CERTILUM. This is Certilum’s own measurement of its own question bank and is not an official Salesforce statistic.
- Questions analysed
- 60
- Exam domains
- 7
- Hardest domain
- Asynchronous Programming (2.0)
- Most approachable domain
- Testing (1.5)
- Question mix
- 23 single · 20 multi · 17 interactive
- Measured on
- Foundation
Frequently asked questions
What our Salesforce Certified JavaScript Developer I complexity numbers mean and how they are produced.