How do I check for hackers , virus on my iPad

Reset your iOS device to factory settings - Apple Support

the best prevention against the possibility of compromise and flawed functionality is to backup your device and update to the latest version of iOS.

How to back up your iPhone, iPad, and iPod touch - Apple Support

if the device is not jailbroken it will not be susceptible to attacks possible otherwise.

JimmyCMPIT wrote:

if the device is not jailbroken it will not be susceptible to attacks possible otherwise.

I disagree. Any device connected to the internet is susceptible to attacks. It may not be easy but not entirely impossible. Looking at OP's device, an iPad 2 running iOS 7, I wouldn't be so confident it can't be breached.

Having said that, the facts presented by OP does not indicate that someone has breached the device.

To Esmeralda1961,

If you've followed the attached article and don't see any new devices, there's a good chance the email you receive is a phishing mail. Delete the email. It's a good idea to change your password while you're logged in to Apple.

ShagCA wrote:

I disagree. Any device connected to the internet is susceptible to attacks. It may not be easy but not entirely impossible.

"If the device is not jailbroken it will not be susceptible to attacks possible otherwise."

There are specific attacks for jailbroken devices that do not exist for iOS devices that were not jailbroken. Reading the sentence again it can be interpreted in a number of ways but I agree any device can be susceptible to an attack, and non-jailbroken iOS devices running anything prior to 9.3.4 were susceptible to an attack that rendered them tantamount to "jailbroken" and thats what the iOS 9.3.5 update addressed.

ShagCA wrote:

Looking at OP's device, an iPad 2 running iOS 7, I wouldn't be so confident it can't be breached.

and I responded "the best prevention against the possibility of compromise and flawed functionality is to backup your device and update to the latest version of iOS."

See this article If you think your Apple ID has been compromised - Apple Support