Publish & Subscribe * 9

• Can I subscribe to multiple channels at the same time?
• Should I use the restore setting?
• What response is expected when publishing a message?
• How do you retain received messages upon page reload?
• Why does a JavaScript client resubscribe upon a page refresh?

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Channels * 7

• How do I access messages published prior to subscribing?
• How many messages can a channel contain?
• How long are messages available?
• How do I connect to multiple channels simultaneously?
• Is a connection closed if I shutdown the PubNub object?

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Message Payloads * 12

• Can I publish in Unicode or Ascii?
• How do I test the message size limit?
• Can my account be configured for different message size limits?
• Can I stream binary data through PubNub?
• Can I send large messages with PubNub?

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Design Patterns * 11

• How do I synchronize multiple devices?
• Can I use PubNub to stream financial data?
• Can I use PubNub to track moving objects?
• How do I create device interaction on a geo grid?
• Can I publish a message via a database trigger?

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Client SDKs 4

• When should I upgrade to a newer SDK version?
• What client libraries (SDKs) are currently supported?
• How can I create a new PubNub client SDK?
• How are PubNub SDKs licensed?

User & Device Identity 3

• How do I identify a device?
• How do I detect dropped connections?
• Does PubNub provide Webhooks?