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Concert Tickets

Seat B1held for2 min to payPaidHeldOn sale
A seat is held for 2 minutes while someone pays, then goes back on sale.

Time 15 minLevel easyFree

  • A concert sale sold out, but only a third of the seats were ever paid for.
  • Use the promoter's complaint and the sale's log to find out why the unpaid seats stayed unavailable.
  • Reproduce it with a test, fix it, and keep the test.
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Session packs

The premium exercises, at full length, with written feedback. Use within one month after purchase; nothing renews.

  • 1 interview

    $10 each

    $10

  • 3 interviews

    $6.67 each, save 33%

    $20

  • 5 interviews

    $5 each, save 50%

    $25

Prices are in USD, tax included. No extra charges at checkout. Free exercises never use a pack - they stay free, with feedback, once you sign up.

For hiring teams

Use Cla64.ai to interview candidates on real coding exercises, with an AI interviewer and written feedback. For team access, write to contact@cla64.ai.