H13-921_V1.5問題集最新版を今すぐ試そう！[2026年03月] 試験準備には欠かせません！
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質問 # 60
The DAS Cloud DBA module can diagnose GaussDB (for MySQL) instances. Which dimensions are included in reports?
- A. Tablespace analysis
- B. Large transaction analysis
- C. Slow SQL analysis
- D. Performance & disk analysis
- E. Full SQL analysis
正解：A、B、C、D、E
質問 # 61
GaussDB (for MySQL) automatically backs up incremental changes every 5 minutes after the last backup.
- A. False
- B. True
正解：B
質問 # 62
GaussDB (for MySQL) has a strong access control system. Which permissions cannot currently be modified?
- A. CREATE TABLESPACE
- B. FILE
- C. SUPER
- D. TRIGGER
正解：B、C
質問 # 63
Which of the following operationscannotbe performed on a diagnostic report?
- A. Dump
- B. View
- C. Download
- D. Subscribe
正解：A
質問 # 64
Which of the following are advanced features of GaussDB (for MySQL)?
- A. Parallel computing
- B. Minute-level elastic scaling
- C. Second-level failover
- D. Massive storage & cross-AZ
- E. 1 write, 15 read
正解：A、B、C、D、E
質問 # 65
Which of the following are DAS Enterprise Edition user roles?
- A. DBA
- B. Regular User
- C. System Administrator
- D. Developer
正解：A、B、C
質問 # 66
When creating a GaussDB (for MySQL) instance, the system automatically creates system accounts (usable by users) to support backend O&M. Which are these accounts?
- A. rdsAdmin
- B. rdsMetric
- C. rdsRepl
- D. rdsBackup
正解：A、C、D
質問 # 67
What is the result of the SQL command: SELECT RPAD('hi', 5, 'u');?
- A. hiuuu
- B. uuuuhi
- C. uuuhi
- D. hiuuuu
正解：A
質問 # 68
Which statements about Schema are correct?
- A. Search order is based on creation time
- B. Forms a namespace to avoid naming conflicts
- C. Collection of DB objects, logical grouping for management
- D. Equivalent to user, separates object ownership
正解：B、C
質問 # 69
When DAS can log into an instance, it is recommended to use Cloud DBA "Emergency Kill Session" to terminate sessions.
- A. True
- B. False
正解：B
質問 # 70
System tables and views record metadata for DB objects and users. Which system table or viewcannotbe used to query user information?
- A. pg_roles
- B. pg_authid
- C. pg_user
- D. pg_auth_members
正解：D
質問 # 71
Hints in GaussDB (for MySQL) mainly include which categories?
- A. Specify index
- B. Specify column names
- C. Specify optimization strategy
- D. Specify join tables
正解：A、C、D
質問 # 72
What are the core advantages of GaussDB (for MySQL)?
- A. High reliability
- B. Ultra-high performance
- C. High scalability
- D. NoSQL support
正解：A、B、C
質問 # 73
Which statements about GaussDB (for MySQL)'s high reliability and scalability are correct?
- A. Shared storage allows fast expansion by adding compute nodes only
- B. Storage layer asynchronously pushes logs in distributed fashion
- C. Binlog delay is eliminated, RTO is guaranteed
- D. Storage up to 256TB, pay-as-you-go, no pre-planning
正解：A、B、C
質問 # 74
Response time calculation model = network transmission time (request) + server processing time (one or more layers) + network transmission time (response) + frontend parsing time.
- A. False
- B. True
正解：B
質問 # 75
Which of the following statements are incorrect?
- A. Page Store persists Pages and SQL reads pages
- B. Slice is independent and max size is 1GB
- C. Log Store uses append-only
- D. Log Store defaults to multi-replica sync
正解：B、D
質問 # 76
Which features does DFV (Data Function Virtualization) provide for elastic scaling?
- A. Cross-region replication, cross-AZ disaster recovery
- B. Thousands of nodes in a single pool
- C. EB-level capacity, billions of objects per device
- D. Linear scaling of capacity and performance
正解：A、B、C、D
質問 # 77
In GaussDB (for MySQL), the optimizer generates execution plans, which are executed by the executor.
- A. False
- B. True
正解：B
質問 # 78
Which are common denormalization practices in DB design?
- A. Increase index count
- B. Add derived columns
- C. Add redundant columns
- D. Recreate tables
正解：B、C、D
質問 # 79
Which statements about distributed transactions are correct?
- A. Support global transaction info management
- B. Support distributed deadlock prevention
- C. Distributed transactions support ACID properties
- D. gs_clean cleans up residual transactions automatically
正解：A、B、C、D
質問 # 80
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 # 81
Which window function can be used to generate group-based ranks with the same rank for identical values?
- A. RANK()
- B. DENSE_RANK()
- C. NTLITE()
- D. ROW_NUMBER()
正解：A
質問 # 82
When creating a user in GaussDB (for MySQL), which info must be specified?
- A. Max connections
- B. Password
- C. Host
- D. Username
正解：B、C、D
質問 # 83
Which methods can be used during requirements investigation?
- A. Sample data collection and analysis
- B. Questionnaire survey
- C. Interviews with business personnel
- D. Review "User Requirements Specification"
正解：A、B、C
質問 # 84
Which of the following descriptions about the MEMORY storage engine is incorrect?
- A. MEMORY storage engine supports only B-tree indexes and not hash indexes.
- B. MEMORY storage engine stores data in memory to provide fast access for queries and joins.
- C. MEMORY storage engine uses fixed-length format for data, and does not support BLOB or TEXT types.
- D. Data in MEMORY tables is lost if the mysqld daemon crashes.
正解：A
質問 # 85
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