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Q11. View the Exhibit and examine the data in the PROMO_NAME and PROMO_END_DATE columns of the promotions table, and the required output format. 

Which two queries give the correct result? A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: C,D 


Q12. Evaluate the following SQL statement: 

Which statement is true regarding the above query if one of the values generated by the subquery is null? 

A. It produces an error. 

B. It executes but returns no rows. 

C. It generates output for null as well as the other values produced by the subquery. 

D. It ignores the null value and generates output for the other values produced by the subquery. 

Answer:


Q13. In which three situations does a transaction complete? 

A. When a DELETE statement is executed 

B. When a ROLLBACK command is executed 

C. When a PL/SQL anonymous block is executed 

D. When a data definition language (DDL) statement is executed 

E. When a TRUNCATE statement is executed after the pending transaction 

Answer: B,D,E 


Q14. Examine the data in the ename and hiredate columns of the employees table: 

You want to generate a list of user IDs as follows: You issue the following query: 

What is the outcome? 

A. It executes successfully and gives the correct output. 

B. It executes successfully but does not give the correct output. 

C. It generates an error because the REPLACE function is not valid. 

D. It generates an error because the SUBSTR function cannot be nested in the CONCAT function. 

Answer:

Explanation: 

REPLACE (text, search_string, replacement_string) Searches a text expression for a character string and, if found, replaces it with a specified replacement string The REPLACE Function The REPLACE function replaces all occurrences of a search item in a source string with a replacement term and returns the modified source string. If the length of the replacement term is different from that of the search item, then the lengths of the returned and source strings will be different. If the search string is not found, the source string is returned unchanged. Numeric and date literals and expressions are evaluated before being implicitly cast as characters when they occur as parameters to the REPLACE function. The REPLACE function takes three parameters, with the first two being mandatory. Its syntax is REPLACE (source string, search item, [replacement term]). If the replacement term parameter is omitted, each occurrence of the search item is removed from the source string. In other words, the search item is replaced by an empty string. . The following queries illustrate the REPLACE function with numeric and date expressions: Query 1: select replace(10000-3, '9', '85') from dual Query 2: select replace(sysdate, 'DEC', 'NOV') from dual 


Q15. View the Exhibit and examine the structure of the products table. 

All products have a list price. 

You issue the following command to display the total price of each product after a discount of 25% and a tax of 15% are applied on it. Freight charges of $100 have to be applied to all the products. 

What would be the outcome if all the parentheses are removed from the above statement? 

A. It produces a syntax error. 

B. The result remains unchanged. 

C. The total price value would be lower than the correct value. 

D. The total price value would be higher than the correct value. 

Answer:


Q16. Which statement is true regarding the UNION operator? 

A. By default, the output is not sorted. 

B. Null values are not ignored during duplicate checking. 

C. Names of all columns must be identical across all select statements. 

D. The number of columns selected in all select statements need not be the same. 

Answer:

Explanation: 

The SQL UNION query allows you to combine the result sets of two or more SQL SELECT statements. It removes duplicate rows between the various SELECT statements. Each SQL SELECT statement within the UNION query must have the same number of fields in the result sets with similar data types. 


Q17. Evaluate the following SQL statement: 

Which statement is true regarding the outcome of the above query? 

A. It executes successfully and displays rows in the descending order of PROMO_CATEGORY. 

B. It produces an error because positional notation cannot be used in the order by clause with set operators. 

C. It executes successfully but ignores the order by clause because it is not located at the end of the compound statement. 

D. It produces an error because the order by clause should appear only at the end of a compound query-that is, with the last select statement. 

Answer:


Q18. Examine the data in the CUST_NAME column of the customers table. 

You need to display customers' second names where the second name starts with "Mc" or "MC." 

Which query gives the required output? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:


Q19. Which statement is true regarding the default behavior of the order by clause? 

A. In a character sort, the values are case-sensitive. 

B. NULL values are not considered at all by the sort operation. 

C. Only those columns that are specified in the select list can be used in the order by clause. 

D. Numeric values are displayed from the maximum to the minimum value if they have decimal positions. 

Answer:

Explanation: 

Character Strings and Dates 

Character strings and date values are enclosed with single quotation marks. 

Character values are case-sensitive and date values are format-sensitive. 

The default date display format is DD-MON-RR. 


Q20. View the Exhibit and examine the structure of the customers table. 

Using the customers table, you need to generate a report that shows the average credit limit for customers in Washington and NEW YORK. 

Which SQL statement would produce the required result? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: