[2026] Use Valid New H13-921_V1.5 Test Notes & H13-921_V1.5 Valid Exam Guide
H13-921_V1.5 Actual Questions Answers PDF 100% Cover Real Exam Questions
NEW QUESTION # 78
If an administrator finds that the InnoDB read cache hit rate is low in GaussDB (for MySQL), what should be optimized first?
- A. Optimize SQL statements
- B. Change network configuration
- C. Change CPU specification
- D. Increase buffer size
Answer: D
NEW QUESTION # 79
UGO (DB & App Migration) is a professional cloud service for heterogeneous DB structure migration and SQL conversion.
- A. True
- B. False
Answer: A
NEW QUESTION # 80
Which of the following statements about stored procedures and functions are correct?
- A. Procedures/functions without parameters can be called without parentheses
- B. Parameters can be specified directly or with =>
- C. Functions return values and can be directly used
- D. Stored procedures can end with ; or /, but not both
Answer: A,B,C,D
NEW QUESTION # 81
With shared storage, GaussDB (for MySQL) can expand by adding compute nodes, completed within minutes regardless of data size.
- A. True
- B. False
Answer: A
NEW QUESTION # 82
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
Answer: A
NEW QUESTION # 83
Which statements about session killing in a database are correct?
- A. Rollbacks during session kill consume resources, may worsen load
- B. Long rollbacks delay session release, resources can't be freed instantly
- C. Killing sessions won't worsen system load
- D. Killing sessions is risky and should be confirmed
Answer: A,B,D
NEW QUESTION # 84
The delay between read-only and primary nodes mainly comes from which of the following?
- A. Read-only nodes deleting WAL
- B. Read-only nodes reading logs
- C. Read-only nodes replaying WAL
- D. Small data sync between hosts
Answer: B,C,D
NEW QUESTION # 85
Which factors should be considered when designing database objects?
- A. Normalization design
- B. Proper indexing
- C. Field types
- D. Field length
Answer: A,B,C,D
NEW QUESTION # 86
When querying information_schema.TABLES, which parameter indicates the size of table fragmentation?
- A. data page
- B. data slice
- C. data_free
- D. data volume
Answer: C
NEW QUESTION # 87
Using SHOW PROCESSLIST provides session-related info. Which of the following are common thread statuses?
- A. Creating
- B. Executing
- C. Killed
- D. Login
Answer: A,B,C,D
NEW QUESTION # 88
A database administrator received a "cannot connect" error. Diagnosis revealed that a new business caused client connections to exceed the preset limit. Which parameter should be adjusted to fix the error?
- A. max_connections
- B. max_connect_errors
- C. connect_timeout
- D. max_user_connections
Answer: A
NEW QUESTION # 89
The EXPLAIN command can be used to view the execution plan of SQL statements. In the execution plan, Type indicates the access method to the table. Which of the following is not a valid Type value?
- A. ALL
- B. NULL
- C. Full
- D. Range
Answer: C
NEW QUESTION # 90
What are the parameter types for stored procedures?
- A. INOUT
- B. IN
- C. OUTIN
- D. OUT
Answer: A,B,D
NEW QUESTION # 91
Which are common denormalization practices in DB design?
- A. Add redundant columns
- B. Increase index count
- C. Recreate tables
- D. Add derived columns
Answer: A,C,D
NEW QUESTION # 92
When creating a user in GaussDB (for MySQL), which info must be specified?
- A. Host
- B. Username
- C. Password
- D. Max connections
Answer: A,B,C
NEW QUESTION # 93
Which of the following statements is correct?
- A. EXPLAIN considers cache
- B. The statistics produced by EXPLAIN are estimates, not exact values
- C. EXPLAIN shows the database's optimization operations during query execution
- D. EXPLAIN can show the effect of triggers, stored procedures, and user-defined functions on a query
Answer: B
NEW QUESTION # 94
Which statements about SQL execution process are correct?
- A. Parser: generates execution plan, selects indexes
- B. Storage engine: stores data, provides read/write interface
- C. Executor: operates engine, returns results
- D. Connector: manages connections, verifies permissions
Answer: B,C,D
NEW QUESTION # 95
The DAS Cloud DBA module can diagnose GaussDB (for MySQL) instances. Which dimensions are included in reports?
- A. Tablespace analysis
- B. Slow SQL analysis
- C. Large transaction analysis
- D. Full SQL analysis
- E. Performance & disk analysis
Answer: A,B,C,D,E
NEW QUESTION # 96
Which of the following statements about GaussDB (for MySQL) fault detection are correct?
- A. Each node periodically outputs status (faults, CPU, memory, etc.)
- B. A node is marked faulty only after 3 consecutive failures to reduce false positives
- C. HA monitor promotes standby on primary failure, recovers standby on fault
- D. Fault detection is handled by HA monitor component
Answer: A,C,D
NEW QUESTION # 97
In GaussDB (for MySQL), session and connection are the same concept.
- A. False
- B. True
Answer: A
NEW QUESTION # 98
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