I HAVE A QUESTION
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Q. WHAT IS A PUSH SYCHRONIZATION IN MOBILE DEVICES AND HOW IT OCUURS AUTOMATICALLY? I KNOW WHEN WE LOGIN TO A GMAIL IT SYCS CONTACTS AND OTHER DATA AUTOMATICALLY
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This is how your device receives data. It can be "pushed" to your device. Or your device can "pull" or request data from the server. If your device is pulling data it doesn't necessarily have to update; if the data is being pushed. The data is sent regardless of whether you want it or not.
