All of the Qs for the first interview are listed here. The second one they seem to change them more often so you'll have to know probability theory fairly well. Still, doing all Qs listed here is a good preparation.
Trader Intern Interview Questions
8,651 trader intern interview questions shared by candidates
What is your hobby?
There is another brain teaser
They asked probability and expected value questions, none of which are too complicated but can be phrased oddly to throw you off or require quite a bit of thinking.
briefly introduce your self
They ask all type of probability problems
Basic behavioural questions no technical
Most of them are probability questions.
They asked me to complete two Bayesian probability question involving cards.
expected value questions, probability questions
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