Passtcert Oracle Certification 1Z0-071 study guides pdf

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Share some Oracle Database 1Z0-071 exam questions and answers below.
Which statement is true regarding the INTERSECT operator? 
A. It ignores NULL values 
B. The number of columns and data types must be identical for all SELECT statements in the query 
C. The names of columns in all SELECT statements must be identical 
D. Reversing the order of the intersected tables the result 
Answer: B

Which two tasks can be performed by using Oracle SQL statements? 
A. changing the password for an existing database 
B. connecting to a database instance 
C. querying data from tables across databases 
D. starting up a database instance 
E. executing operating system (OS) commands in a session 
Answer: C,E

Which three statements are true regarding the data types? 
A. Only one LONG column can be used per table. 
B. ATIMESTAMP data type column stores only time values with fractional seconds. 
C. The BLOB data type column is used to store binary data in an operating system file. 
D. The minimum column width that can be specified for a varchar2 data type column is one. 
E. The value for a CHAR data type column is blank-padded to the maximum defined column width. 
Answer: A,D,E

Which statement is true regarding external tables? 
A. The default REJECT LIMIT for external tables is UNLIMITED. 
B. The data and metadata for an external table are stored outside the database. 
C. ORACLE_LOADER and ORACLE_DATAPUMP have exactly the same functionality when used with an external table. 
D. The CREATE TABLE AS SELECT statement can be used to unload data into regular table in the database from an external table. 
Answer: D

Which two statements are true regarding the GROUP BY clause in a SQL statement? (Choose two.) 
A. You can use column alias in the GROUP BY clause. 
B. Using the WHERE clause after the GROUP BY clause excludes the rows after creating groups. 
C. The GROUP BY clause is mandatory if you are using an aggregate function in the SELECT clause. 
D. Using the WHERE clause before the GROUP BY clause excludes the rows before creating groups. 
E. If the SELECT clause has an aggregate function, then those individual columns without an aggregate function in the SELECT clause should be included in the GROUP BY clause. 
Answer: D,E

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