How should I practice Previous Bus Departure?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Visa online assessment problems in FastPrep.

Is Previous Bus Departure associated with Visa?

FastPrep tags this as a Visa online assessment coding practice problem when the problem catalog has that company and stage context.

Problem

Previous Bus Departure

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VisaFULLTIMEOA

Problem statement

You are given an array departures of bus departure times in chronological order. Each time is in HH:MM 24-hour format.

You are also given the current time currentTime in the same format. Return the departure time of the latest bus that departed strictly before currentTime. If no bus departed before currentTime, return "-1".

Function

previousBusDeparture(departures: String[], currentTime: String) → String

Examples

Example 1

departures = ["08:15", "09:45", "11:30", "14:00"]currentTime = "12:00"return = "11:30"

The latest departure strictly before 12:00 is 11:30.

Example 2

departures = ["08:15", "09:45"]currentTime = "08:15"return = "-1"

A bus at exactly currentTime is not before the current time, and there is no earlier departure.

Constraints

Each time string is in HH:MM 24-hour format.
departures is sorted in chronological order.