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The Oracle 1z1-071 Exam consists of 73 questions and has a time limit of 100 minutes. The questions are of multiple-choice format and cover a wide range of topics, including SQL concepts, data manipulation, data definition, and SQL queries. Candidates who pass the exam will receive a certification that demonstrates their proficiency in SQL and can help them advance their careers as database developers or administrators.

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Oracle Database SQL Sample Questions (Q116-Q121):

NEW QUESTION # 116
The EMPLOYEES table contains columns EMP_IDof data type NUMBERand HIRE_DATEof data type DATE.
You want to display the date of the first Monday after the completion of six months since hiring.
The NLS_TERRITORYparameter is set to AMERICAin the session and, therefore, Sunday is the first day of the week.
Which query can be used?

A. SELECT emp_id, NEXT_DAY (MONTHS_BETWEEN (hire_date, SYSDATE), 6) FROM
employees;
B. SELECT emp_id, NEXT_DAY(ADD_MONTHS(hire_date, 6), 'MONDAY') FROM employees;
C. SELECT emp_id, NEXT_DAY(ADD_MONTHS(hire_date, 6), 1) FROM employees;
D. SELECT emp_id, ADD_MONTHS(hire_date, 6), NEXT_DAY('MONDAY') FROM employees;

Answer: B

Explanation:
Explanation/Reference: http://www.dba-oracle.com/t_add_months.htm

NEW QUESTION # 117
Evaluate the following statement.

Which statement is true regarding the evaluation of rows returned by the subquery in the INSERT statement?

A. The insert statement would give an error because the ELSE clause is not present for support in case none of WHEN clauses are true.
B. They are evaluated by the first WHEN clause. If the condition is false, then the row would be evaluated by the subsequent WHEN clauses.
C. They are evaluated by the first WHEN clause. If the condition is true, then the row would be evaluated by the subsequent WHEN clauses.
D. They are evaluated by all the three WHEN clauses regardless of the results of the evaluation of any other WHEN clause.

Answer: D

Explanation:
References:
http://psoug.org/definition/WHEN.htm

NEW QUESTION # 118
Which two are true about external tables that use the ORACLE_DATAPUMP access driver?
(Choose two.)

A. When creating an external table, data can be selected only from a table whose rows are stored in database blocks.
B. Creating an external table creates a directory object.
C. Creating an external table creates a dump file that can be used only by an external table in the same database.
D. When creating an external table, data can be selected from another external table or from a table whose rows are stored in database blocks.
E. Creating an external table creates a dump file that can be used by an external table in the same or a different database.

Answer: D,E

NEW QUESTION # 119
Which two statements are true regarding the WHERE and HAVING clauses in a SELECT statement? (Choose two.)

A. The WHERE clause can be used to exclude rows before dividing them into groups.
B. The HAVING clause can be used with aggregate functions in subqueries.
C. The WHERE and HAVING clauses can be used in the same statement only if they are applied to different columns in the table.
D. The aggregate functions and columns used in the HAVING clause must be specified in the SELECT list of the query.
E. The WHERE clause can be used to exclude rows after dividing them into groups.

Answer: A,B

NEW QUESTION # 120
Which two will execute successfully?

A. SELECT COALESCR('DATE', SYSDATE) FROM DUAL;
B. SELECT COALESCE(O,SYSDATE) TRCH DUAL;
C. SELECT COALESCE('DATE',SYSDATE) FROM (SELECT NULL AS "DATE" FROM DUAL) ;
D. SELECT NVL('DATE',200) FROM (SELECT NULL AS "DATE" FROM DUAL);
E. SELECT NVL('DATE',SYSDATE) FROM DUAL;

Answer: D

Explanation:
D). True. The NVL function can replace a NULL value with a specified value, and it does not require the data types to match exactly, allowing implicit conversion where possible. Here, 'DATE' is a string literal, and 200 is a number, and since the selected column is NULL, NVL will return 200.
The other options are incorrect because the COALESCE function requires all arguments to be of the same data type or at least compatible types that Oracle can implicitly convert. In A and E, the use of COALESCE with a string literal 'DATE' and SYSDATE (which is a date type) is not compatible without explicit conversion. Option C has a typo (TRCH instead of FROM) and is mixing data types incorrectly.

NEW QUESTION # 121
......

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