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2018 Microsoft 70-487 Dumps (All 113 Q&As) from Pass4itsure 8-29
QUESTION 8
You need to recommend a data access technology to the contractor to retrieve data from the new data source. Which data access technology should you recommend?
A. LINQ to XML
B. ADO.NET Entity Framework
C. ADO.NET DataSets
D. WCF Data Services
070-487 exam Correct Answer: D
Explanation
Explanation/Reference:
QUESTION 9
Errors occasionally occur when saving data using the FlightInfoContext ADO.NET Entity Framework context. Updates to the data are being lost when an error occurs. You need to ensure that data is still saved when an error occurs by retrying the operation. No more than five retries should be performed. Which code segment should you use as the body of the SaveChanges() method in the FlightInfoContext.es file?
A
Question: 10
Which clause & a query controls the rows mat will be returned? (Choose 2)
A – Compute
B – From
C – Having
D – Order by
E – Where
70-487 dumps Answer: C, E
Question: 11
What will the following command do?
select * into titles_copy from titles where 1 = 2
A – All rows from titles table are copied into titles_copy table.
B – All rows from titles are copied into titles_copy where the first column equals the second column.
C – Only the structure of the table titles is copied into titles_copy table.
D – The command fails with an error message.
Answer: C
Question: 12
Which of the following statements results it the LEAST amount of transaction log activity?
A – Delete titles
B – Insert into titles values (“BU1013”. How to be a Great Developer”)
C – Select * into test_table from titles
D – Update titles set price=12.00 where title_id=”BU1013”
070-487 pdf Answer: C
Question: 13
In the list below, the order of precedence is listed from left to right for key words. Which of the following choices is the order of precedence ASE uses in a WHERE clause?
A – and/or/not
B – or/and/not
C – Not/and/or
D – Parentheses must be used to determine precedence
Answer: C
Question: 14
If @@sqlstatus = 2, then:
A – The cursor has fetched beyond the end of the cursor result set.
B – The fetch was successful.
C – The fetch failed with a permissions problem.
D – The transaction has committed successfully.
070-487 vce Answer: A
Question: 15
Which of the following SQL statements will return the titles with a price > the average price? (Choose 3)
A – Select title from titles having price > avg(price)
B – select title from titles where price> avg(price)
C – declare @avg_price money select avg_price = select avg_price from titles select title from titles where price > avg_price
D – Select title from titles where price> (select avg_price from titles)
E – Select title into #temp_titles from titles where price > avg(price)
Answer: A, C, D
Question: 16
How is the difference between ‘union’ and ‘union all’ reflected in the query plan?
A – The difference is not visible in the query plan
B – ‘union’ often causes a table scan, while ‘union all’ does not
C – ‘union all’ often causes a table scan, while ‘union’ does not
D – ‘union’ requires one worktable more than ‘union all’
E – ‘union all’ requires one worktable more than ‘union’
Answer: D
Question: 17
Which statements are true about the ANSI join syntax?
A – The On clause and the Where clause are semantically identical and can always be interchanged without affecting the query behavior
B – The On clause specifies only join conditions; the Where clause specifies only search arguments
C – The On clause specifies only search arguments; the Where clause specifies only join conditions
D – The On clause specifies join conditions and search arguments; the Where clause is applied to the joined rows
E – The On clause is applied to the joined rows; the Where clause specifies join conditions and search arguments
070-487 exam Answer: D
Question: 18
Which of the following measures may improve join performance? (Choose 3)
A – Running update statistics on both tables.
B – Ensuring the join column datatypes are identical.
C – Placing the join column in the SELECT column list.
D – Creating clustered indexes on both columns of the join.
E – Ensuring the join columns do not contain NULL values.
Answer: A, B, D
Question: 19
What statements are true regarding joins? (Choose 3)
A – Column names in the WHERE clause do not need to be the same.
B – Columns in the WHERE clause must be in the column list to the SELECT clause.
C – Since null is unknown, only null values can join with other null values.
D – To join N tables, you need at least N 1 join conditions in the WHERE clause.
E – A join without any join conditions produces a Cartesian product.
070-487 dumps Answer: A, D, E
Question: 20
Which of the following outer joins are syntactically correct? (Choose 3)
A – select from t1, t2 where t1.c1*> t2.c1
B – select from t1, t2, t3 where t1.c1*= t2.c1 and t2.c2 = t3.c2
C – select from t1 left outer join t2 on t1 c1 >t2.c1
D – select from t1 left outer join t2 on t1 c1 =t2.c1 left outer join t3 on t2.c2 = t3.c2
E – select from t1 left outer join t2 left outer join t3 on t1 c1 =t2.c1 on t2.c2 = t3.c2
F – select from t1 left outer join t2 left outer join t3 on t2.c2 = t3.c2 on t1.c1 =t2.c1
Answer: C, D, F
Question: 21
Given the following syntax, what is the final value of @N?
declare @N int
select@N = 1
while@N <= 10 begin select@N = @N + 1 end A -1 B – 9 C – 10 D – 11 E – NULL Answer: D Question: 2 Which of the following are minimally logged operations? (Choose 2) A – Select* into new tab from old tab B – Insert publishers select * from old_publishers C – Truncate table publishers D – Delete from publishers Answer: A, C Question: 3 Which of the following conditions will ALWAYS make an UPDATE deferred? (Choose 2) A – The table is replicated B – The table has an update trigger C – Where clause of the UPDATE contains an OR D – Where clause of the UPDATE contains a join E – Query contains a self join Answer: C, E Question: 4 In which case is the optimizer able to use 2 different indexes for a single query? A – Select * from titles where title_id=”BU1034” and qty>12.00
B – Select * from titles order by pub_id, title_id
C – Select * from titles where title_id=”BU1034” or price>12.00
D – Select * from titles where type=”business” or type=”psychology”
070-487 pdf Answer: C
Question: 22
Which of the following are minimally logged operations? (Choose 2)
A – Select* into new tab from old tab
B – Insert publishers select * from old_publishers
C – Truncate table publishers
D – Delete from publishers
Answer: A, C
Question: 23
Which of the following conditions will ALWAYS make an UPDATE deferred? (Choose 2)
A – The table is replicated
B – The table has an update trigger
C – Where clause of the UPDATE contains an OR
D – Where clause of the UPDATE contains a join
E – Query contains a self join
070-487 vce Answer: C, E
Question: 24
In which case is the optimizer able to use 2 different indexes for a single query?
A – Select * from titles where title_id=”BU1034” and qty>12.00
B – Select * from titles order by pub_id, title_id
C – Select * from titles where title_id=”BU1034” or price>12.00
D – Select * from titles where type=”business” or type=”psychology”
Answer: C
Question: 25
Which of the following show plan outputs would indicate the optimizers choice of the DR strategy?
A – Worktable created Positioning at index start
B – Using Dynamic Index Positioning by Row Identifier (RID)
C – Using OR strategy Positioning by key
D – This step involves sorting Using GETSORTED
070-487 exam Answer: B
Question: 26
Which of the following are fully-optimizable SARGs? (Choose 3)
A – au_lname = “Aoki”
B – price > 1500*2
C – price * 2 > 3000
D – substring (au_lname,1,2) = “Ao”
E – au_lname like “Aok%”
Answer: A, B, E
Question: 27
Consider a large table X with following schema:
clustered index idx1 on columns A, B
non-clustered index idx2 on column A
and a non-clustered index idx3 on column B.
Which access method will the optimizer Choose for the following query?
select * from X
where A * 3 = 159.35
and B!= “California”
A – Clustered index (idx1) scan
B – Table scan
C – Non-clustered Index (idx2) scan
D – Non-clustered Index (idx3) scan
070-487 dumps Answer: B
Question: 28
What command can be used to display the final decisions that the optimizer makes about queries? (Choose 2)
A – set show plan on
B – set noexec on
C – set statistics io on
D – dbcc traceon(302)
E – dbcc traceon(310)
Answer: A, E
Question: 29
Examine the following non-covered query:
select au_lname, au_fname, phone
from authors where
Which three rules must be followed so that the Adaptive Server optimizer may choose an index to retrieve the rows? (Choose 3)
A – must be the leading column in an index on authors
B – must be the trailing column in an index on authors
C – must be a valid SARG operator
D – must be enclosed in quotes if datatype is numeric, decimal or float
E – no functions or arithmetic operators may be used on
070-487 pdf Answer: A, C, E
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