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- calculator with a string as input such as "5 * 3 -2 *4" and returning the result - validation of a json like data structure describing a state machine with some consistency rules such as "each terminal state in the terminal key/value pair must exist in the states array, terminal states cannot have associated mappings to other states, non terminal states must have mappings to next states with transition names as key and next state as value, ..." - the system design question was about designing an anomaly or fraud detection service working with rules. The rules of the service apply to either one record or to a set of records.
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Senior Backend Developer

Interviewed at Unit21

3.4★
Mar 5, 2022

- calculator with a string as input such as "5 * 3 -2 *4" and returning the result - validation of a json like data structure describing a state machine with some consistency rules such as "each terminal state in the terminal key/value pair must exist in the states array, terminal states cannot have associated mappings to other states, non terminal states must have mappings to next states with transition names as key and next state as value, ..." - the system design question was about designing an anomaly or fraud detection service working with rules. The rules of the service apply to either one record or to a set of records.

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