1Z0-909最も有効な質問と解答で勉強

本番と同じ緊張感の中で時間配分を試せるかどうかが、Oracle MySQL 8.0 Database Developerの仕上がりを左右します。Tech4Examのテストエンジンは1Z0-909本試験の環境を再現し、66問の練習問題を模擬試験形式で繰り返し解けます。

Oracle 1Z0-909 試験概要:

Oracle 1Z0-909 試験シラバストピック:

1Z0-909に挑戦する方へ – よくある質問まとめ

Oracle MySQL 8.0 Database Developer 認定 1Z0-909 試験問題：

問題 #1

Examine these statements and output:

Now, examine this command:
Mysql> ROLLBACK;
What is true about the effect of the command?

A. It returns an error because there is no active transaction.
B. It has no effect.
C. It undoes the update command.
D. It undoes both insert and update commands.
E. It undoes the insert command.

問題 #2

Examine this statement and output:

What causes the error?

A. The engine is disabled.
B. The database user does not have sufficient privilege.
C. The set local_infile option has not been enabled.
D. The database server is running in read-only mode.
E. The database server process does not have sufficient privilege.
F. The database client process does not have sufficient privilege.

問題 #3

Examine this statement and output:
CREATE TABLE geom (g GEOMETRY NOT NOLL, SPATIAL INDEX(g) ) ; Query OK, 0 rows affected, 1 warning (0.01 sec) An attempt is made to add an SRID attribute to the column using the statement:
ALTER TABLE geom MODIFY COLUMN g geometry NOT NULL SRID 0;
Which is true?

A. Execution succeeds and allows the use of the index by the optimizer.
B. An error is generated because srid o is an invalid identifier value.
C. Execution succeeds with a warning.
D. An error is generated because the index prevents changes to the column.

問題 #4

Which two statements are true about aggregate functions?

A. AVG () does not allow use of the distinct option.
B. SUM () returns o if there are no rows to aggregate.
C. COUNT (distinct) returns a count of the number of rows with different values including Null.
D. MAX () returns null if there are no rows to aggregate.
E. MIN () cannot use distinct when it executes as a Windows function.

問題 #5

Examine this statement:
DECLARE not_found CONDITION FOR SQLSTATE '02000';
In which two statements can not found be used?

A. in a leave statement to exit a loop
B. in a while loop
C. in a handler declaration
D. in an if statement
E. in a signal statement

解説：