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H13-921_V1.5 Huawei HCIP-GaussDB-OLTP V1.5 Free Practice Exam Questions (2025 Updated)

Prepare effectively for your Huawei H13-921_V1.5 HCIP-GaussDB-OLTP V1.5 certification with our extensive collection of free, high-quality practice questions. Each question is designed to mirror the actual exam format and objectives, complete with comprehensive answers and detailed explanations. Our materials are regularly updated for 2025, ensuring you have the most current resources to build confidence and succeed on your first attempt.

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Total 214 questions

The frequency of flushing logs from the buffer to disk is related to the parameter innodb_flush_log_at_trx_commit. Which value means "write log buffer data to log file and flush to disk every second"?

A.

1

B.

3

C.

2

Which of the following statements is correct?

A.

EXPLAIN can show the effect of triggers, stored procedures, and user-defined functions on a query

B.

EXPLAIN considers cache

C.

EXPLAIN shows the database’s optimization operations during query execution

D.

The statistics produced by EXPLAIN are estimates, not exact values

Which of the following statements about GaussDB (for MySQL) fault detection are correct?

A.

Fault detection is handled by HA monitor component

B.

Each node periodically outputs status (faults, CPU, memory, etc.)

C.

HA monitor promotes standby on primary failure, recovers standby on fault

D.

A node is marked faulty only after 3 consecutive failures to reduce false positives

Which of the following descriptions about the MEMORY storage engine is incorrect?

A.

MEMORY storage engine stores data in memory to provide fast access for queries and joins.

B.

MEMORY storage engine supports only B-tree indexes and not hash indexes.

C.

Data in MEMORY tables is lost if the mysqld daemon crashes.

D.

MEMORY storage engine uses fixed-length format for data, and does not support BLOB or TEXT types.

DRS real-time migration supports only public network, VPC, and VPN migration.

A.

True

B.

False

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.

Range

C.

Full

D.

NULL

Which command can GaussDB (for MySQL) use to view server status information?

A.

print

B.

select

C.

desc

D.

show

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

Which statements about field optimization in GaussDB (for MySQL) are correct?

A.

Choose efficient field types when possible

B.

Choose shorter field lengths when possible

C.

Match field type to business use (e.g., numeric for amounts)

D.

Design adequate length to avoid later schema changes

GaussDB (for MySQL) supports compute-storage separation.

A.

True

B.

False

GaussDB for MySQL adopts a compute-storage separation design. What is its greatest value?

A.

Compatible with MySQL client

B.

Reduces deployment costs and server requirements

C.

Maintains open-source control

D.

Distributes data access load before server startup, allowing fast server switch during failures

In GaussDB (for MySQL), user variables are session variables that can be saved and shared across sessions.

A.

True

B.

False

SQL statements exceeding slow_launch_time are recorded in the slow SQL log.

A.

True

B.

False

Huawei Cloud DB Security Audit supports analyzing SQL behavior by risk levels, SQL injection, blacklist statements, and unauthorized operations.

A.

True

B.

False

What are the main advantages of the GaussDB (for MySQL) product?

A.

High reliability

B.

High scalability

C.

Ultra-high performance

D.

High compatibility

For composite indexes, B+ tree is built left-to-right.

A.

True

B.

False

Which type of backup in GaussDB (for MySQL) isretained even afterthe instance is deleted?

A.

Incremental backup

B.

Manual backup

C.

Full backup

D.

Automatic backup

Which statements about distributed transactions are correct?

A.

Support distributed deadlock prevention

B.

Support global transaction info management

C.

Distributed transactions support ACID properties

D.

gs_clean cleans up residual transactions automatically

Which of the following statements about GaussDB (for MySQL) compatibility are correct?

A.

Syntax compatibility with MySQL 8.0 and functions

B.

Development ecosystem compatibility (e.g., Hibernate, MyBatis, Druid)

C.

Tool compatibility (MySQL WorkBench, Navicat, MySQL Dumper, PL/SQL Developer)

D.

Connector compatibility (MySQL JDBC, ODBC)

What is the result of the SQL command: SELECT RPAD('hi', 5, 'u');?

A.

hiuuuu

B.

uuuuhi

C.

hiuuu

D.

uuuhi

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