Tracking Consecutive Logins | Dataford Interview Questions

Given a log, how would you track consecutive login attempts for one specific user, and then how would you extend it to track consecutive attempts for all users?

Assume the log is ordered chronologically and each record is [user_id, success], where success is a Boolean. Return the maximum consecutive failed-login streak for the requested user, or a dictionary containing that value for every user when no user is specified.

Use def track_consecutive_attempts(log, user_id=None):.

Constraints

0 <= log.length <= 10000
Each record has exactly two values: a non-empty user ID and a Boolean success value
The log is ordered chronologically
user_id is either null or a user ID
When user_id is provided, it may or may not appear in the log

Function Signature

def track_consecutive_attempts(log, user_id=None):

Your question is Tracking Consecutive Logins. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Given a log, how would you track consecutive login attempts for one specific user, and then how would you extend it to track consecutive attempts for all users?

Use def track_consecutive_attempts(log, user_id=None):.

Constraints

0 <= log.length <= 10000
Each record has exactly two values: a non-empty user ID and a Boolean success value
The log is ordered chronologically
user_id is either null or a user ID
When user_id is provided, it may or may not appear in the log

Function Signature

def track_consecutive_attempts(log, user_id=None):

Your question is Tracking Consecutive Logins. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.