integration testing Questions

Being novice and currently working in support and name sake testing i want to know if it would worth orr beneficial to learn Salesforce if I project to be in as Software Tester ahead. Please help asap.

how to test vulnerability of ecommerce, whether the applied security is properly working or not?

whether the website can be hacked by anyone or not

Am using selenium web driver for switching between windows,the code works in windows and Linux with all browser combinations but it is not working in I Phone .

Please let me know whether this switching between windows works in I Phone or not.

As there are very limited resources regarding this issue,so please kindly support me to know what causes this issue.

Please help me.

Thanks.

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