Why does the following PL/SQL block fail to execute successfully? DECLARE  v_name1 VARCHAR2(20);BEGIN   DECLARE v_name2 VARCHAR2(20);   BEGIN         DBMS_OUTPUT.PUT_LINE(v_name1);   END;   DBMS_OUTPUT.PUT_LINE(v_name2);END;

Which of the following best describes the role of a wireframe in user interface (UI) design?

What is the default exception block used to catch all unhandled exceptions?

What is the parameter mode for p_name in the query_demo procedure in the following PL/SQL block? DECLARE  p_name  persons.name%TYPE;    p_sal   persons.salary%TYPE;BEGIN  query_demo(178, p_name, p_sal);  DBMS_OUTPUT.PUT_LINE(‘Name: ‘ || p_name);  DBMS_OUTPUT.PUT_LINE(‘Salary: ‘ || p_sal);END;

Consider the following data files:  digits-en.txtThis file contains digits (0 to 9) and their lower-case spelling in English.Example of contents:  nine 9two 2one 1four 4 digits-fr.txtThis file contains similar information, but the digit comes first and the words are in French (without accentuated letters, to make things easier).Example of contents:  8 huit3 trois4 quatre1 un digits.txtThis file contains only numbers.Example of contents:  354298 Please note the following:  Our files may not all feature the same numbers. We will therefore have the spelling for some numbers in only one language, in both, or in none. None of the files are to be assumed to be already sorted by numbers. A single space is used as separator in all files. We want you to use join in order to display the following sorted lists of numbers (only numbers, not any words): All numbers that are found in digits.txt, that also have an English spelling in digits-en.txt. All numbers, that are found in digits-en.txt and digits-fr.txt, that have only a French spelling, but no English spelling. All numbers, that are found in digits-en.txt and digits-fr.txt, that have a spelling in only one of the two languages. Provide the Linux command lines to achieve these three separate objectives.

Which of the following options represents examples of integrity constraints in a database? (select only one)  

Define Data visualization, Responsive web design, Web 2.0 technologies, Ajax, and XML

Which of the following factors concerning potential bias in the presentation of output are correct? (Select all that apply)

What was one of Stella’s faults, according to Swift? Hint: Swift’s birthday poem to Esther Johnson

The chart below shows summer vacation plans for Mary and her friends. Choose one person and answer the following questions about her/his plan. Write the name of your choice in the parenthesis of the first question. 　　　　   どこにいく？ どうやって？ どのくらい？ どこにとまる？ なにをする？ Mary will go back to USA by plane 2 weeks will stay at home will meet friend Ken will go to Tokyo with friends by bullet train 1 week will stay at hotel will play at Tokyo Disneyland ディズニーランド Sue will go to Taiwan with Lee by plane 3 weeks will stay at Lee’s house will do shopping Tom will go to the south pole (南極(なんきょく)) by boat 2 months   don’t know yet will take a picture with penguins(ペンギン) 　　 　　　　　 ( 　　　　)さんは夏休(なつやす)みにどこかに行くつもりですか。 どうやって行きますか。 だれと行きますか。 どのくらい行きますか。 どこに泊(と)まりますか。 そこで、何をするつもりですか。