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NEW QUESTION: 1
A. Option A
B. Option D
C. Option B
D. Option C
Answer: A,B
Explanation:
B-Tree Index
Structure of a B-tree Index
At the top of the index is the root, which contains entries that point to the next level in the index. At the next level are branch blocks, which in turn point to blocks at the next level in the index. At the lowest level are the leaf nodes, which contain the index entries that point to rows in the table. The leaf blocks are doubly linked to facilitate the scanning of the index in an ascending as well as descending order of key values.
Format of Index Leaf Entries
An index entry has the following components:
* Entry header: Stores the number of columns and locking information
* Key column length-value pairs: Define the size of a column in the key followed by the value for the column (The number of such pairs is the maximum of the number of columns in the index.)
* ROWID: Row ID of a row that contains the key values
B-Tree Index (continued)
Index Leaf Entry Characteristics
In a B-tree index on a nonpartitioned table:
* Key values are repeated if there are multiple rows that have the same key value unless the index is compressed
* There is no index entry corresponding to a row that has all key columns that are NULL.
Therefore, a WHERE clause specifying NULL always results in a full table scan.
* A restricted ROWID is used to point to the rows of the table because all rows belong to the same segment Effect of DML Operations on an Index The Oracle server maintains all the indexes when DML operations are carried out on a table. Here is an explanation of the effect of a DML command on an index:
* Insert operations result in the insertion of an index entry in the appropriate block.
* Deleting a row results only in a logical deletion of the index entry. The space used by the deleted row is available for new sequential leaf entries.
* Updates to the key columns result in a logical delete and an insert to the index. The PCTFREE setting has no effect on the index except at the time of creation. A new entry may be added to an index block even if it has less space than that specified by PCTFREE.
Types of Indexes
These are several types of index structures that are available depending on your needs.
Two of the most common are:
* B-tree index
- Default index type; in the form of a balanced tree
* Bitmap index:
- Has a bitmap for each distinct value indexed
- Each bit position represents a row that may or may not contain the indexed value.
- Best for low-cardinality columns
NEW QUESTION: 2
What must the administrator do to set up the sample audit reports that come with IBM Cognos BI?
A. Create a separate data source connection to the content store.
B. Set up a log file and configure log messages to be sent to the file.
C. Set up an audit database and configure log messages to be sent to the database.
D. Create a Framework Manager model using either a database or flat file as the data source, and then publish a package.
Answer: C
NEW QUESTION: 3
Your network contains an on-premises Active Directory forest named contoso.com. The forest contains the users shown in the following table.
You create an Azure Active Directory (Azure AD) tenant named fabrikam.onmicrosoft.com.
You plan to sync the users in the forest to fabrikam.onmicrosoft.com by using Azure AD Connect.
Which username will be assigned to User1 and User2 in Azure AD after the synchronization? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
Explanation
If you added the contoso.com and east.contoso.com domains as custom domains in Microsoft 365, then the users would be assigned their user principle names as Microsoft 365 usernames.
However, the question does not state that you have added the domains as custom domains. Therefore, both users will use the default @fabrikam.onmicrosoft.com domain for their usernames.