What is dpkg-query on iphone?

I downloaded an app on my iphone called "carat" that says what uses the most battery on your phone and it says that "dpkg-query" uses a bit of life. I'm jailbroken if that helps. What is this? How do I fix it.

How to fix my iPhone stuck in the Recovery Mode loop?

I recently tried to update my iPhone 4s to iOS 7.1.2. After the update, the iPhone went into recovery mode and now I can't seem to get it out of the loop. I have tried RecBoot, redsn0w, Tinyumbrella, and I have also tried sn0wbreeze and IREB but the versions I had told me that IREB doesn't do the iPhone 4s and that sn0breeze doesn't do iOS 7.1.2. Anything could help because I have things on my phone that can't be replaced. I have learned now to back up as often as I can.

My iPhone 4 makes this weird noise occasionally?

So I have a white iPhone 4 on the latest ios 7. Occasionally, it makes this weird quick whining noise like something being turned on, like a high pitched beep, but only for like 2 seconds. I hope someone knows why? I doesn't lag or anything when it does, just the noise.

Thanks

Added (1). It only makes the sound rarely.

I spilled coke on my iPhone 5s. What should I do?

So I was eating and accidentally spilled coke on my iPhone 5s. So far it's working perfectly fine. The speakers are great, when I talk on the phone I can hear them and they can hear me, and the screen is just the same as before. But should I do something before anything bad happens?