H13-921_V1.5問題集最新の2026年03月28日練習テスト216リアル解答があります
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質問 # 67
What does GaussDB (for MySQL) use in stored procedures to implement the effect of dynamic SQL updates?
- A. Scheduler
- B. Cursor
- C. Trigger
- D. Regular expressions
正解：B
質問 # 68
If an administrator finds that the InnoDB read cache hit rate is low in GaussDB (for MySQL), what should be optimized first?
- A. Change network configuration
- B. Increase buffer size
- C. Optimize SQL statements
- D. Change CPU specification
正解：B
質問 # 69
Using SHOW PROCESSLIST provides session-related info. Which of the following are common thread statuses?
- A. Login
- B. Killed
- C. Executing
- D. Creating
正解：A、B、C、D
質問 # 70
Which of the following is NOT a feature of a read-only node?
- A. Can quickly add a read-only node
- B. Can quickly be promoted to primary node
- C. Can quickly delete a read-only node
- D. Handles some write requests
正解：D
質問 # 71
Which of the following statements is correct?
- A. The statistics produced by EXPLAIN are estimates, not exact values
- B. EXPLAIN shows the database's optimization operations during query execution
- C. EXPLAIN can show the effect of triggers, stored procedures, and user-defined functions on a query
- D. EXPLAIN considers cache
正解：A
質問 # 72
Which statements about GaussDB (for MySQL) read-only nodes are correct?
- A. Specs match the cluster
- B. No need to manage accounts/databases, syncs from primary
- C. Can be manually promoted to primary
- D. Provide system performance monitoring
正解：A、B、C、D
質問 # 73
Which descriptions about session parameters are correct?
- A. interactive_timeout: max idle time for interactive connections
- B. max_connections: maximum allowed connections
- C. connect_timeout: exception thrown if connection not established in time
- D. wait_timeout: max idle time for non-interactive connections
正解：A、B、C、D
質問 # 74
Which factors affect database performance?
- A. Software environment
- B. Hardware
- C. System scale
- D. Internal DB factors
正解：A、B、C、D
質問 # 75
Read-only nodes replay WAL and read Page Store to sync with the primary node's memory state, including active transactions and buffer pool.
- A. True
- B. False
正解：A
質問 # 76
Which of the following is a normal tenant creation process?
- A. Bind roles and tenant
- B. Add parent tenant
- C. Add tenant
- D. Plan resource management
正解：A、B、C、D
質問 # 77
Which regex pattern is used to match one or more 'h' characters?
- A. h-
- B. h+
- C. h*
- D. h
正解：B
質問 # 78
Which steps belong to the overall installation process?
- A. System configuration
- B. Software installation and deployment
- C. Post-installation check
- D. Pre-installation preparation
正解：A、B、C、D
質問 # 79
In the failover process of GaussDB (for MySQL), when can the new host officially start providing write operations to clients?
- A. After manage-vip is successfully bound
- B. After data-vip is successfully bound
- C. After standby is promoted to primary
- D. After manage-vip is successfully unbound
正解：B
質問 # 80
Which metrics can be displayed in real-time performance?
- A. Network traffic
- B. Slow queries
- C. QPS
- D. DML execution count
正解：A、B、C、D
質問 # 81
Huawei Cloud's recycle bin policy is enabled by default and cannot be turned off. What is the default retention period in days?
- A. 0
- B. 1
- C. 2
- D. 3
正解：C
質問 # 82
Which command in GaussDB (for MySQL) is used to view server status information?
- A. print status
- B. desc status
- C. select status
- D. show status
正解：D
質問 # 83
GaussDB (for MySQL) uses snapshots for both full and incremental backups, with second-level creation efficiency.
- A. True
- B. False
正解：B
質問 # 84
Performance can be measured against a baseline. Ideally, what should a performance baseline include?
- A. Database statistics
- B. Operating system statistics
- C. Application statistics
- D. Network statistics
正解：A、B、C、D
質問 # 85
To facilitate management, DAS Enterprise Edition includes several user roles. Which of the following isnot among them?
- A. DBA
- B. Regular User
- C. System Administrator
- D. Business Owner
正解：D
質問 # 86
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