For a cloud-native application that requires consistent and low-latency access to data, which IBM Cloud database service should be utilized?

Question

Options

• AIBM Cloud Object Storage
• BIBM Cloud File Storage
• CIBM Cloud Databases for Redis
• DIBM Cloud Databases for PostgreSQL

• A
  10% (3)
• B
  13% (4)
• C
  74% (23)
• D
  3% (1)

Explanation

IBM Cloud Databases for Redis is correct because Redis is an in-memory data store purpose-built for consistent, low-latency access - it keeps data in RAM rather than on disk, making it ideal for caching, session management, and real-time workloads in cloud-native architectures.

Why the distractors are wrong:

• A (Object Storage): Optimized for high-throughput storage of large unstructured blobs (images, backups, logs) - not designed for low-latency, frequent reads/writes.
• B (File Storage): Provides NFS-based shared file access for lift-and-shift workloads; adds network and disk I/O overhead, making it unsuitable for low-latency requirements.
• D (PostgreSQL): A robust relational database great for complex queries and ACID transactions, but disk-based and not optimized for the sub-millisecond latency Redis achieves.

Memory tip: Think Redis = Real-time + RAM - any exam question mentioning "low-latency," "caching," or "in-memory" is pointing at Redis.

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