Oracle certification 1Z0-071 exam questions pdf

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Share some Oracle Database 1Z0-071 exam questions and answers below.
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 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 two statements are true about sequences created in a single instance database? (Choose two.) 
A. CURRVAL is used to refer to the last sequence number that has been generated 
B. DELETE would remove a sequence from the database
C. The numbers generated by a sequence can be used only for one table
D. When the MAXVALUE limit for a sequence is reached, you can increase the MAXVALUE limit by using the ALTER SEQUENCE statement
E. When a database instance shuts down abnormally, the sequence numbers that have been cached but not used would be available once again when the database instance is restarted
Answer: A,D

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 statements are true? (Choose all that apply.)
A. The data dictionary is created and maintained by the database administrator.
B. The data dictionary views can consist of joins of dictionary base tables and user-defined tables.
C. The usernames of all the users including the database administrators are stored in the data dictionary.
D. The USER_CONS_COLUMNS view should be queried to find the names of the columns to which a constraint applies.
E. Both USER_OBJECTS and CAT views provide the same information about all the objects that are owned by the user.
F. Views with the same name but different prefixes, such as DBA, ALL and USER, use the same base tables from the data dictionary
Answer: C,D,F

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