Google Interview Question for SDE1s

Country: United States
Interview Type: Phone Interview

Comment hidden because of low score. Click to expand.
of 3 vote

function getMaxFlightsInAir (flightSchedules) {

    let sortedAirEvents = => ({date: schedule.departureTime, eventType: 'departure'}))
        .concat( => ({date: schedule.arrivalTime, eventType: 'arrival'})))
        .sort((eventA, eventB) => {
            return -;

    let maxFlights = 0;
    let currFlights = 0;
    for (i = 0; i < sortedAirEvents.length; i++) {
        currFlights += sortedAirEvents[i].eventType === 'departure'
          ? 1
          : -1;

        maxFlights = currFlights > maxFlights ? currFlights : maxFlights;

        console.log ("current date: " + sortedAirEvents[i].date + " ( " + sortedAirEvents[i].eventType + "),  currFlights = " + currFlights + ",  maxFlights = " + maxFlights);

    return maxFlights;

- shakazulu April 16, 2018 | Flag Reply
Comment hidden because of low score. Click to expand.
of 0 vote

Make two different array one for departure time and another for arrival time. Sort them according to time. iterate through both array simultaneously increase pointer of array having smaller time. whenever increase pointer of departure array increase flight in air count decrease otherwise. during traversal max count achieved is answer.

- Soniya March 08, 2019 | Flag Reply

Add a Comment

Writing Code? Surround your code with {{{ and }}} to preserve whitespace.


is a comprehensive book on getting a job at a top tech company, while focuses on dev interviews and does this for PMs.

Learn More


CareerCup's interview videos give you a real-life look at technical interviews. In these unscripted videos, watch how other candidates handle tough questions and how the interviewer thinks about their performance.

Learn More

Resume Review

Most engineers make critical mistakes on their resumes -- we can fix your resume with our custom resume review service. And, we use fellow engineers as our resume reviewers, so you can be sure that we "get" what you're saying.

Learn More

Mock Interviews

Our Mock Interviews will be conducted "in character" just like a real interview, and can focus on whatever topics you want. All our interviewers have worked for Microsoft, Google or Amazon, you know you'll get a true-to-life experience.

Learn More