To answer this question, let's understand the components of an MQ message.

An MQ message, in the context of IBM MQ (formerly known as WebSphere MQ), consists of two parts: the message descriptor and the message data.

1. Message Descriptor: This part contains information about the message, such as the message type, message format, expiry time, priority, etc. It provides metadata about the message.

2. Message Data: This part contains the actual payload or content of the message. It can be any data, such as text, binary data, XML, JSON, etc.

Based on this information, the statement "MQ message has a data part and a descriptor part" is true. The descriptor part provides information about the message, while the data part contains the actual content.

Therefore, the correct answer is A) True.

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