How should I practice Select Compatible Card Applications?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Stripe phone screen problems in FastPrep.

Is Select Compatible Card Applications associated with Stripe?

FastPrep tags this as a Stripe phone screen coding practice problem when the problem catalog has that company and stage context.

Select Compatible Card Applications

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Problem statement

A payment card advertises application identifiers in preference order, and a terminal supports its own set of application identifiers.

Return the identifiers advertised by the card that the terminal also supports. Preserve the card's original order. Matching is exact and case-sensitive.

Function

selectCompatibleApplications(cardApplications: String[], terminalApplications: String[]) → String[]

Examples

Example 1

cardApplications = ["A0000000031010","A0000000041010","A00000002501"]terminalApplications = ["A0000000041010","A0000000031010"]return = ["A0000000031010","A0000000041010"]

Both Visa and Mastercard identifiers are supported, and the card's preference order is retained.

Example 2

cardApplications = ["app.pay","app.rewards","app.credit"]terminalApplications = ["app.credit","app.pay"]return = ["app.pay","app.credit"]

app.rewards is not supported. The remaining identifiers follow card order, not terminal order.

Example 3

cardApplications = ["A","B"]terminalApplications = ["a","C"]return = []

Matching is case-sensitive, so A does not match a.

Constraints

0 <= cardApplications.length, terminalApplications.length <= 100000.
Each array contains unique non-empty identifiers.
Every identifier has length at most 200.
Matching is exact and case-sensitive.