Map an Android bug report

The task

All challenge data is synthetic or comes from the Lab's published articles. No account is needed, nothing you type here leaves your browser except each answer you check, and the optional form if you send it.

What you need

Questions

Each answer is checked when you press Check answer, and you see the result straight away. A wrong answer costs nothing, and you may try again. A hint lowers the points you can earn for that question: 1, 2 and 3 points for hints 1, 2 and 3, and a correct answer always earns at least 1 point. Checking needs JavaScript; reading does not.

1. Question 1 of 810 points

   Into how many categories does the article sort what a bug report holds?

   Answer to question 1

   Check answer

   Need a hint?

   Three hints, in order. Each one lowers the points you can earn for this question.

   Hint 1 costs 1 point

   The number is in the article's opening paragraph.

   Hint 2 costs 2 points

   It is also the number of rows in the table under Figure 1.

   Hint 3 costs 3 points

   More than twenty, fewer than twenty-five.

2. Question 2 of 810 points

   Which anchor section is the article's marker for the category Permissions, app ops and roles?

   appops package batterystats lock_settings

   Check answer

   Need a hint?

   Three hints, in order. Each one lowers the points you can earn for this question.

   Hint 1 costs 1 point

   Open the table under Figure 1 and find the category.

   Hint 2 costs 2 points

   Anchor sections are the names of services or logs, such as package or batterystats.

   Hint 3 costs 3 points

   The name is the short form of application operations.

3. Question 3 of 810 points

   What did the article find about the dense body of the system log in the five sample reports?

   It reached back a full week It ran from a few minutes to about three hours It reached back about 30 days It was the same length in every report

   Check answer

   Need a hint?

   Three hints, in order. Each one lowers the points you can earn for this question.

   Hint 1 costs 1 point

   See Table 1, How far back each kind of section reaches.

   Hint 2 costs 2 points

   Event sections have short windows. A snapshot has none.

   Hint 3 costs 3 points

   The window differs between reports and is measured in minutes to hours.

4. Question 4 of 810 points

   In how many of the five sample reports was the lock settings section present?

   Answer to question 4

   Check answer

   Need a hint?

   Three hints, in order. Each one lowers the points you can earn for this question.

   Hint 1 costs 1 point

   Use Figure 2, or the row Lock settings in the section matrix CSV.

   Hint 2 costs 2 points

   Count the reports marked present.

   Hint 3 costs 3 points

   The two Samsung reports and the Motorola report have it. The Huawei and Transsion-brand reports do not.

5. Question 5 of 815 points

   Select everything a bug report cannot give you.

   Select all that apply.

   File contents and message bodies Network destinations ADB keys or signer certificates The list of installed packages The Android version and patch level

   Check answer

   Need a hint?

   Three hints, in order. Each one lowers the points you can earn for this question.

   Hint 1 costs 1 point

   See What a bug report cannot give.

   Hint 2 costs 2 points

   Three of the five options are things the report does not hold.

   Hint 3 costs 3 points

   It does not hold file contents and message bodies, network destinations, or ADB keys and signer certificates.

6. Question 6 of 815 points

   Select the sections that appear in only one of the five sample reports, the Motorola report with Android 15.

   Select all that apply.

   Motorola settings service Update engine Huawei power manager Per-app data usage Lock settings

   Check answer

   Need a hint?

   Three hints, in order. Each one lowers the points you can earn for this question.

   Hint 1 costs 1 point

   Use the section matrix. Look at the column for the Motorola report.

   Hint 2 costs 2 points

   Both are rows under Differs by manufacturer or version.

   Hint 3 costs 3 points

   One is a vendor settings service, the other is an update component.

7. Question 7 of 810 points

   In the sample report with the most sections cut by the device time limit, how many sections were cut?

   Answer to question 7

   Check answer

   Need a hint?

   Three hints, in order. Each one lowers the points you can earn for this question.

   Hint 1 costs 1 point

   The last two rows of the matrix give counts per report.

   Hint 2 costs 2 points

   Find the largest value in the row for sections cut by the time limit.

   Hint 3 costs 3 points

   It is one of the two Samsung reports.

8. Question 8 of 810 points

   A section was cut by the device time limit. What does that tell you?

   That nothing happened in the part that was cut That the rest was not captured, which says nothing about what happened That the phone was switched off That the whole report is invalid

   Check answer

   Need a hint?

   Three hints, in order. Each one lowers the points you can earn for this question.

   Hint 1 costs 1 point

   See the closing list in What a bug report cannot give.

   Hint 2 costs 2 points

   A cut section is not a clean one.

   Hint 3 costs 3 points

   It says what was not reached, and nothing about what happened there.