最新的 ValueOps 250-608 免費考試真題:

1. Which two steps help improve ML model accuracy when using MADlib?
(Choose two)

A) Normalizing numeric input features
B) Splitting data into training and test sets
C) Rewriting queries using hash joins
D) Repartitioning tables to a single segment

2. Which two spatial operations can benefit from spatial indexing in PostGIS?
(Choose two)

A) ST_Within
B) ST_Intersects
C) ST_AsText
D) ST_Buffer

3. What is the function of gpfdist in the Greenplum data loading process?

A) It transfers tables between databases
B) It backs up files before loading
C) It is a Python library for in-database analytics
D) It acts as a lightweight data server to stream external files to segments

4. In Greenplum, a ___ is a logical structure that contains tables, views, indexes, and other database objects.

A) role
B) schema
C) master
D) segment

5. Which two benefits are gained by enabling segment mirroring in Greenplum?
(Choose two)

A) Higher concurrency during queries
B) Ability to promote mirrors in real-time
C) Fault tolerance during hardware failures
D) Reduced need for backups

問題與答案：