1z1-909無料問題集「Oracle MySQL 8.0 Database Developer」

質問 1

Examine these MySQL Shell statements:

What is the true about the attempts to add document to the collection?

（A）First three documents are added, then different number of fields cause an error.

（B）First two documents are added, then mismatched field names cause a warning.

（C）All documents are added and cause a warning.

（D）First two documents are added, then mismatched field names cause an error.

（E）All documents are added without any error or warning.

正解：C 解答を投票する

質問 2

Examine this statement which has executed successfully:

（A）The statement takes advantage of index description_idx.

（B）Execution performance can be improved by adding an index on column description.

（C）Execution performance can be improved by using like instead of RLIKE.

（D）No index will improve statement performance.

（E）Execution performance can be improved by, using a composite index with column description as the leftmost prefix column description.

正解：C 解答を投票する

質問 3

Examine this bar graph based on columns from the players table:

Which two statements would generate this bar graph?

（A）SELECT Name, Gender, Sport, REPEAT('# 'Y GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

（B）SELECT Name, Gender, Sport, CONCAT ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

（C）SELECT Name, Gender, Sport, LENGTH (GPA*10, '# ') AS GPA_Graph FROM players ORDER BY GPA DESC;

（D）SELECT Name, Gender, Sport, CHAR_LENGTH ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

（E）SELECT Name, Gender, Sport, RPAD ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

正解：A、E 解答を投票する

質問 4

Examine this statement and output:

Which will provide the same level of detail when the error is encountered within a stored routine?

（A）

（B）

（C）

（D）

正解：A 解答を投票する

質問 5

Examine this statement that execute successfully in an interactive session:

The user running this session now goes to lunch for an hour.
Now, examine these statements executed independently in separate sessions while Session 0 is still active:

How many of them will complete while Session 0 is still active?

（A）3

（B）5

（C）1

（D）4

（E）2

（F）0

正解：C 解答を投票する

質問 6

Which statement is true about the show errors command?

（A）It displays similar diagnostics results as get diagnostics.

（B）It displays the total number of errors, warnings, and notes since the server last restarted.

（C）It displays errors messages only, since the start time of the current session.

（D）It displays errors messages only, since the server last restarted.

（E）It cannot display information for more than max_errot_count server system variable setting.

（F）It displays the total number of errors, warnings, and notes since the beginning of the current session.

正解：F 解答を投票する

質問 7

Examine this statement and output:

Which is true?

（A）Column Name in myview can be indexed if the is_updatable attribute is true.

（B）myview was defined with the temptable processing algorithm.

（C）The underlying table's index on the Name column is not chosen because of low selectivity.

（D）myview cannot be automatically indexed.

正解：B 解答を投票する

1z1-909 無料問題集「Oracle MySQL 8.0 Database Developer」

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