Reverse the given string without using inbuilt java methods... 😭😭😭😭

Every time you will get this question even when you have more than 6 yrs of experience 😡

I had this question once, although they didn't specify a language to use and didn't say no builtins, so... I used python.

return string[::-1]

This was for a Cloud DevOps job... Entry level, but still...

I don't think it's anything to do with the job, but problem solving and reversing a string is a pretty basic problem.

@SanitizedOutput you can't do something like this

new StringBuffer("your string").reverse().toString();

This should work with java too

@SanitizedOutput that is exactly what I was thinking. How to I convert this string to an array of chars without any methods

@SanitizedOutput then .split(""), dont be a r

Always I will use this logic Hope this is acceptable...

@ashokramcse This will break characters that need more than 1 byte.

Push each character to a stack, pop them off into a new string. Reversed.

put a mirror in front of the screen

I ask this question too in interviews. For a couple of reasons: when someone applies for a senior C# position I expect to know the framework's built in reverse method. If he doesn't know that, then I expect him to know that, when concatenating strings, you should use a stringbuilder when you do more than 5 concats, and if the applicant says to have experience in TDD, I expect to see it developed using TDD. In addition, this is quite a basic task, and you don't need strong mathematical skills to create a proper algorithm, I prefer such a simple assignment over some simple assignment that requires a solid mathematical background, unless of course you apply for a job as 3D engine developer where you'd need math.
Though the simple assignment you'd be surprised of all the different solutions people come up with! It gives a great opportunity for discussing why someone did it like that and gain some insights in someones way of thinking.