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Oracle 1Z0-909 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Use MySQL Shell to access document stores
  • Retrieve data from the database by using a connector
Topic 2
  • Explain the programming constructs used in stored routines
  • Choose between connectors for a given application
Topic 3
  • Store and process spatial data
  • Design, create, and alter views
Topic 4
  • Demonstrate connector use, management and configuration
  • Secure credentials and connections
Topic 5
  • Create and access a document store
  • JSON and Document Store
  • Store and process numeric data
Topic 6
  • Understand locking mechanisms within MySQL
  • Control transactions in applications
Topic 7
  • Rewrite queries for optimization
  • Store and process string data
Topic 8
  • Resolve consistency problems with isolation levels
  • Set SQL Modes to change MySQL behavior

Oracle MySQL 8.0 Database Developer Sample Questions (Q42-Q47):

NEW QUESTION # 42
Which two are true about indexes?

  • A. Indexes reduce disk space used.
  • B. Indexing all of a table's columns improves performance.
  • C. Secondary index access will always be faster than a table scan.
  • D. Indexes contain rows sorted by key values.
  • E. Indexes are used to enforce unique constraints.

Answer: A,B


NEW QUESTION # 43
Examine this table definition:
1Z0-909-25f2f620401182988818a43b5002c8c7.jpg
The table must always remain a valid document store collection. What restriction does this impose on any added column?

  • A. The column must be indexed.
  • B. The column must be used in a unique constraint.
  • C. The column must be a generated column referencing only an existing attribute of doc.
  • D. The column must be a generated column referencing any attribute of doc.
  • E. The column must have a default value.

Answer: D


NEW QUESTION # 44
Examine this statement which has executed successfully:
1z0-909-b00eeb384a4542c76230d9a6971dec45.jpg

  • A. Execution performance can be improved by using like instead of RLIKE.
  • B. The statement takes advantage of index description_idx.
  • C. Execution performance can be improved by adding an index on column description.
  • 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.

Answer: A


NEW QUESTION # 45
Examine these statements issued from Session 1 which execute successfully:
1Z0-909-b9ec16cbf59ec4a309818725a0e892e2.jpg
Now, examine this statement issued from Session 2:
1Z0-909-7fe290b116d3ab0ed6fc3ded47e3e821.jpg
What is the outcome of the update statement in Session 2?

  • A. The statement will wait for the transaction in Session 1 to finish.
  • B. A deadlock will occur.
  • C. The row will be updated immediately.
  • D. The transaction in Session 1 will be rolled back automatically.

Answer: D


NEW QUESTION # 46
The continent column in the country table contains no null values.
Examine this output:
1Z0-909-ee7f3644185298e8ce7b0e76a0183cee.jpg
A)
1Z0-909-76b59ff520b0d8bab1148eba4d475f34.jpg
B)
1Z0-909-a5e98c02fb8731ce55faf5aaa0a33e7b.jpg
C)
1Z0-909-d7d8936b7d71c673e95d4f1ce41c5fdb.jpg
D)
1Z0-909-52e352375693cae461850c9f3c7779d3.jpg

  • A. Option D
  • B. Option C
  • C. Option B
  • D. Option A

Answer: D


NEW QUESTION # 47
......

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