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510-015 PDF DEMO:
QUESTION NO: 1
Given the following cursor code fragment, declare title_cursor cursor for select price from title for update go
declare@price moneyopen title_cursor fetch title_cursor into @price
What locks are held on the row or data page with each fetch?
A. Update locks
B. Exclusive locks
C. Shared locks
D. No locks are held
Answer: A
QUESTION NO: 2
The following are the server level lock promotion configuration parameters: page lock promotion
HWM 200 page lock promotion LWM 100 page lock promotion PCT 60 row lock promotion HWM 1800 row lock promotion LWM 1200 row lock promotion PCT 70 Table A is a datarows locked table. It has 200 data pages and every page has 10 data rows. A serial query has acquired 1400 data row locks. What kind of lock promotion will be attempted?
A. No lock promotion
B. Promotion to 140 page locks C. Promotion to 140 page locks, then to a table lock
D. Promotion to a table lock
Answer: D
QUESTION NO: 3
An application uses stored procedures to perform updates, inserts and deletes for an OLTP application. Some update stored procedures optimize with a join order of table_A -> table_B. Other stored procedures optimize with a join order of table_B -> table_A. Which solution needs to be added within the stored procedures to guarantee that deadlocks are reduced or eliminated by always making the join order table_A -> table_B?
A. Non-correlated subqueries to force outside-in processing
B. SET FORCEPLAN ON
C. (index tableorder 1) - an index hint applied to table_A
D. SET SHOWPLAN ON
E. Define join-ordered Views on the affected tables
Answer: B
QUESTION NO: 4
The titles table has 50,000 rows and a nonclustered index on the price column. Which of the following queries use less logical I/Os?
A. select "Min" = min(price), "Max" = max(price) from titles
B. select "Min" = (select min(price) from titles), "Max" = (select max(price) from titles)
C. They will both use the same number of I/Os
Answer: B
QUESTION NO: 5
The following query is executed frequently against the database. select a.au_fname, a.au_lname, ad.street, ad.city, ad.state, ad.zip
from authors a, author_address ad where a.au_id = ad.au_id What database denormalization technique could be used to improve the performance of this query?
A. Move the au_lname and au_fname columns to the author_address table.
B. Collapse the author_address and authors table into a single table.
C. Move the city, state, and zip columns to the authors table.
D. Create a view called mailing_address to eliminate the two table join from the query.
E. Add the redundant column au_id to the author_address table.
Answer: B
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Updated: May 27, 2022