Q121
Q121 How does MySQL Cluster achieve high availability?
By using shared storage
By using disk mirroring
By synchronously replicating data across nodes in real-time
By periodically backing up data
Q122
Q122 What is the primary benefit of using Galera Cluster over standard MySQL replication?
Faster data replication
Automatic node provisioning
Synchronous replication and automatic conflict resolution
Manual switching during failures
Q123
Q123 In MySQL, what does sharding help with?
Data recovery
Data archiving
Data scalability
Data encryption
Q124
Q124 What does the following MySQL command achieve?
CHANGE MASTER TO MASTER_HOST='master2', MASTER_LOG_FILE='log-bin.000012', MASTER_LOG_POS=123;
Initiates a new master server
Changes replication settings to a new master log
Restarts the MySQL server
Updates the server configuration
Q125
Q125 How does the max_connections setting affect a MySQL server?
Limits the number of open transactions
Limits the number of database users
Sets the maximum number of allowable connections
Restricts query execution time
Q126
Q126 Identify the issue with this replication setup command:
SET GLOBAL sql_slave_skip_counter = 2; START SLAVE;
The slave counter should not be set globally
This command should be followed by a server restart
It skips error events in replication, which can lead to data inconsistency
All are correct
Q127
Q127 What is a potential risk when using the LOAD DATA INFILE statement in a replication setup?
It can lock the table on the master
It might not replicate to the slave under certain configurations
It increases the load on the network
It is not supported in clustered environments
Q128
Q128 What is the difference between asynchronous and synchronous replication in MySQL?
Asynchronous waits for an event; synchronous does not
Asynchronous is faster; synchronous is slower
Asynchronous does not guarantee data consistency; synchronous does
Asynchronous uses more resources; synchronous uses less
Q129
Q129 How does MySQL Cluster (NDB) handle data partitioning?
Automatically partitions data across all data nodes
Manually partitions data based on user settings
Does not support data partitioning
Only partitions data on request
Q130
Q130 Which type of replication is preferred for high fault tolerance in MySQL Cluster?
Asynchronous replication
Synchronous replication
Semi-synchronous replication
Delayed replication
Q131
Q131 What does the following command do in the context of MySQL replication?
CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000001', MASTER_LOG_POS=107;
Changes the replication master to a new server
Updates where the slave should start reading the master's binary log
Stops replication
Resets the master's binary log
Q132
Q132 How do you configure a MySQL server to act as a slave in a replication topology?
Use the SLAVE START command
Modify the my.cnf file to include master server details
Use the SERVER SLAVE command
Execute REPLICATE START on the database
Q133
Q133 In MySQL Cluster, what role does the ndb_mgmd daemon play?
Manages memory allocation for the cluster
Acts as the primary data node
Provides connection pooling services
Manages cluster configuration and node management
Q134
Q134 Identify the flaw in this replication setup command:
SET GLOBAL gtid_slave_pos='3E11-2343-23EE-2445'; START SLAVE;
GTID format is incorrect
There's no error; the command is correct
GTID should be set at the session level, not globally
It uses an outdated command structure
Q135
Q135 What’s problematic about setting up replication with the following configuration:
binlog_format=MIXED; in a cluster that supports only row-based logging?
Mixed format can cause errors with some queries
The configuration is fine
Row-based logging is not supported in clusters
Mixed format is less secure than row-based
Q136
Q136 What is a common method to connect a Python application to a MySQL database?
Using the PyMySQL library
Using the direct TCP/IP connection
Using SSH tunneling
Using XML configurations
Q137
Q137 How does JDBC handle MySQL transactions in Java applications?
By using auto-commit mode by default
By disabling transactions
By manual locking mechanisms
By using only prepared statements
Q138
Q138 When integrating MySQL with PHP, what does the PDO extension provide that the older mysql extension does not?
Asynchronous query execution
Native JSON support
Support for multiple databases
Stored procedure debugging
Q139
Q139 In the context of connecting to MySQL from a Node.js application, what is an advantage of using the mysql2 library over mysql?
Improved performance and prepared statements support
Only supports older MySQL versions
Includes automatic data encryption
Is easier to configure
Q140
Q140 What does this PHP line of code do?
$stmt = $pdo->prepare('SELECT * FROM users WHERE email = ?');
Prepares a SQL statement for execution with a placeholder for email
Executes a query to find all users
Connects to the 'users' database
Logs a user in based on email
Q141
Q141 How do you execute a transaction in a Node.js application using the mysql library?
Using connection.beginTransaction();
Using mysql.startTransaction();
By automatically starting on any connection.query()
Using transaction.commit();
Q142
Q142 What is the purpose of using ORM (Object-Relational Mapping) tools like Sequelize with MySQL?
To allow SQL commands to be written in JavaScript
To convert MySQL queries to NoSQL
To map database schemas to application models
To encrypt database communication
Q143
Q143 What could be the issue if a Python script using SQLAlchemy cannot connect to a MySQL database?
Incorrect database URL format
Outdated Python version
Firewall blocking the connection
All are correct
Q144
Q144 Identify the issue in this JDBC URL:
jdbc:mysql://localhost:3306;databaseName=mydb;user=root;password=root;
Incorrect delimiter used
Port number is wrong
Password should not be included
User should be specified with a URL parameter
Q145
Q145 What is MySQL Workbench primarily used for?
Database design and modeling
Query optimization
User management
Database replication
Q146
Q146 How does MySQL Workbench assist in optimizing SQL queries?
By generating query syntax
By visually displaying query execution plans
By executing queries faster
By rewriting queries automatically
Q147
Q147 What feature does MySQL Workbench provide for server administration?
Server startup and shutdown controls
Automatic patching
Cloud service integration
Real-time traffic monitoring
Q148
Q148 In MySQL Workbench, how is a new schema created?
By executing CREATE SCHEMA mySchema; in the SQL editor
By selecting File > New Schema
By using the Schema Wizard
By right-clicking on the Schemas panel and selecting 'Create Schema'
Q149
Q149 What does the 'Performance Dashboard' in MySQL Workbench display?
Current server status and system health
Historical data analysis
User session statistics
Detailed error logs
Q150
Q150 What common issue might occur when connecting MySQL Workbench to a MySQL server?
Incorrect password or username
Syntax errors in queries
Corrupted installation files
Network connection timeout
