Comparison

Data Engineer Cert Prep vs NCA

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Data Engineer Cert Prep

Features
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Pass the AWS Certified Data Engineer โ€“ Associate (DEA-C01) exam with a native, offline-first practice app built around real exam scenarios across every domain of the current exam. WHY THIS APP Most Data Engineer quiz apps are thin question dumps with no explanations or a domain mix that doesn't match the real exam. This one is built and weighted to the official DEA-C01 exam guide, and every question โ€” not just the answer key โ€” comes with a full explanation of why the right choice is right and the others are wrong. WHAT'S INCLUDED (FREE) - 100 exam-style questions weighted to match the official DEA-C01 domain breakdown - Every question comes with a detailed explanation referencing official AWS documentation - Choose 5, 10, or 15 questions per practice session - Track your progress, streaks, and score history right on your device - Works fully offline- study on a plane, a commute, anywhere - No account, no sign-up, no ads - The first 100 questions are free. One in-app purchase unlocks all 150 in this app, with no subscription. EXAM DOMAINS COVERED - Data Ingestion and Transformation (34%) - Kinesis, MSK, Glue ETL, DMS, Firehose, EventBridge, MWAA, Lambda - Data Store Management (26%) - S3, Redshift, DynamoDB, Aurora, Lake Formation, OpenSearch, Iceberg/Glue Data Catalog - Data Operations and Support (22%) - CloudWatch, Step Functions, EMR, Glue Data Quality, AWS Batch, Amazon Q Developer - Data Security and Governance (18%) - IAM least privilege, Lake Formation permissions, KMS, Macie, VPC endpoints BUILT FOR REAL STUDYING Every question is written as a scenario a working data engineer would actually face, with distractor answers that test common misconceptions rather than obvious wrong picks. Explanations cite the relevant AWS service behavior directly so you learn the reasoning, not just memorize a letter. WANT MORE? Djamgatech PRO bundles a bigger 150-question Data Engineer Associate bank alongside dozens of other AWS, Azure, GCP, and AI certification question banks in one app - all offline, all ad-free. Start practicing for free today and walk into your DEA-C01 exam ready.

About

NCA

Features
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PASS YOUR NVIDIA NCA-AIIO: AI INFRASTRUCTURE AND OPERATIONS EXAM 500+ practice questions 5-minute study sessions Track your progress Remove mastered questions Text-to-speech support Dark mode available WHY GET CERTIFIED? Certified AI infrastructure professionals earn up to $203K annually (Skillsoft 2024). NCA-AIIO validates foundational knowledge of AI computing infrastructure and operations in enterprise environments. WHAT YOU'LL MASTER: NVIDIA software stack for AI environments Training vs inference architecture requirements AI, machine learning, and deep learning concepts GPU vs CPU architectures and acceleration NVIDIA TensorRT and GPU Operator DGX SuperPOD and data center platforms Bluefield DPU for workload offloading InfiniBand and NVSwitch networking Kubernetes orchestration and job scheduling Data analysis and visualization techniques Model evaluation with statistical metrics Energy-efficient computing strategies Cloud AI deployment considerations MLOps and AI lifecycle management STUDY ANYWHERE: Coffee breaks. Commutes. Lunch hours. Turn dead time into AI infrastructure expertise. Download now. Pass your exam. Master NVIDIA AI infrastructure.

Screenshots

Data Engineer Cert Prep3 screens
NCA3 screens

Verdict

The call

The clearest difference is in-app purchases: NCA at none against Data Engineer Cert Prep's 1. On price, update cadence, ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Data Engineer Cert Prep sells 1 one-off in-app purchase. NCA asks for nothing beyond the download.

UpkeepUpdate frequency

Data Engineer Cert Prep ships an update every 2 months, NCA every 3 months. The most recent releases landed on November 4, 2026 and October 28, 2026 respectively.

Scorecard1 real difference ยท 5 level
Data Engineer Cert Prep versus NCA: the parameters behind the verdict, then further details
ParameterData Engineer Cert PrepNCA
PriceFreeFree
Update frequencyEvery 2 months โ€” betterEvery 3 months
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS16.015.0 โ€” better
Further details โ€” not scored
Size1 MB26 MB
Age rating4+4+
DeveloperDjamgaTech CorpDavy Raitt

In-app purchases

1 purchases

Data Engineer Cert Prep

One-time1
  • 50 More Questions$4.99
None

NCA

No in-app purchases

Questions

Is Data Engineer Cert Prep free?
Data Engineer Cert Prep is free to download, with in-app purchases available.
Is NCA free?
NCA is free to download, with no in-app purchases.
Do Data Engineer Cert Prep or NCA have ads?
Neither Data Engineer Cert Prep nor NCA shows ads.
Which is updated more often, Data Engineer Cert Prep or NCA?
Data Engineer Cert Prep ships an update every 2 months, and NCA every 3 months. Most recently, Data Engineer Cert Prep was updated on November 4, 2026 and NCA on October 28, 2026.

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