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Share some Oracle Database 1Z0-071 exam questions and answers below.
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 multiple-row subqueries? (Choose two.) 
A. They can contain group functions. 
B. They always contain a subquery within a subquery. 
C. They use the < ALL operator to imply less than the maximum. 
D. They can be used to retrieve multiple rows from a single table only. 
E. They should not be used with the NOT IN operator in the main query if NULL is likely to be a part of the result of the subquery. 
Answer: A,E

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 two statements are true regarding the COUNT function? (Choose two.) 
A. COUNT(*) returns the number of rows including duplicate rows and rows containing NULL value in any of the columns 
B. COUNT(cust_id) returns the number of rows including rows with duplicate customer IDs and NULL value in the CUST_ID column 
C. COUNT(DISTINCT inv_amt) returns the number of rows excluding rows containing duplicates and NULL values in the INV_AMT column 
D. A SELECT statement using COUNT function with a DISTINCT keyword cannot have a WHERE clause 
E. The COUNT function can be used only for CHAR, VARCHAR2 and NUMBER data types 
Answer: A,C

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

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