I’ve never heard of any organization asking software interview questions about the basics of loops or classes. If you are asking that, it is very, very weird of you.
Meanwhile asking about data structures and algorithms is an extremely ubiquitous industry standard for interviewing new grads and entry level programmers up through experienced veterans - and is practiced by nearly every tech company and tech recruiting agency under the sun.
Your expression of surprise about this suggests you are not very aware of the tech industry or software hiring practices.
But regardless, all the same issues would apply to asking about loops or classes that apply to asking about linked lists or sorting. In professional work, none of that is ever addressed in a time crunch with someone actively surveilling you and assessing intermediate explanations - so concluding someone is bad at coding from a poor interview performance is just flat wrong.
Meanwhile asking about data structures and algorithms is an extremely ubiquitous industry standard for interviewing new grads and entry level programmers up through experienced veterans - and is practiced by nearly every tech company and tech recruiting agency under the sun.
Your expression of surprise about this suggests you are not very aware of the tech industry or software hiring practices.
But regardless, all the same issues would apply to asking about loops or classes that apply to asking about linked lists or sorting. In professional work, none of that is ever addressed in a time crunch with someone actively surveilling you and assessing intermediate explanations - so concluding someone is bad at coding from a poor interview performance is just flat wrong.