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質問 29
Consider the following code:
What change should be made to ensure that it correctly displays the value of name in all uppercase letters?
- A. Line 1 should be changed to var name = new sting("Jaccb");
- B. Line 2 should be changed to name .prototype . toUpperCase () ;
- C. Line 3 should be changed to document. write (NAME) :
- D. Line 2 should be changed to name = name . toUpperCase () ;
正解: C
質問 30
Marshall's computer previously contracted malware because he unknowingly clicked on an infected link in a pop-up window. What can he do to secure the Web browser so that he is protected in the future?
- A. Disable cookies in the Web browser
- B. Install anti-virus software
- C. Install the latest beta update for the Web browser
- D. Enable the pop-up blocker
正解: C
質問 31
Which choice demonstrates the correct syntax for declaring a variable to represent the month in which a person was born?
- A. Var %birthMonth
- B. Var birthMonth
- C. Var ?birthMonth
- D. Var -birthMonth
正解: C
質問 32
Consider the following code:
What text will display in the alert dialog box?
- A. Ar Jo
- B. Ar J
- C. Ear Jo
- D. Ear J
正解: D
質問 33
Which of the following comparison statements will return true?
- A. X = 15
Y = 3;
X ! == y; - B. X = 15 ;
Y = 3 ;
X == y ; - C. X=15
Y=3;
X +==45; - D. X = 15
Y = 3
X === y;
正解: B
質問 34
Scarlet has the following code in her script:
Var namesArr =[''Joseph',' Charlotte'', ''Nicole''];
She wants to add the name Hank to the end of the array so that its length is 4. What code should she use?
- A. namesArr .shift (''Hank'');
- B. namesArr push (''Hank'');
- C. namesArr unshift (''Hank'');
- D. namesArr [4] ''Hank'';
正解: A
質問 35
Geraldine is creating a custom object to store user account data on her Web site. She has written the following code it is not working properly. What change should she make to enable the script to run correctly?
- A. She must remove the this keyword from the left side of the assignment variables
- B. She must change the this keyword to the object keyword on the left side of the assignment variables
- C. She must change the function keyword to the object keyword in the function definition
- D. She must add the parameters username. password and email to the function definition
正解: A
質問 36
Consider the following code:
What will this alert display?
- A. It appears fall has arrived
- B. Yes It appears winter has arrived
- C. It appears winter has arrived
- D. Yes It appears fall has arrived
正解: B
質問 37
Kirken needs to write a script to construct custom objects that store user account information such as a username. password and e-mail address for a Web site. What should he add to the following code to set these properties?
A)
B)
C)
D)
- A. Option D
- B. Option B
- C. Option A
- D. Option C
正解: D
質問 38
Which of the following is not a best practice when using JavaScript libraries?
- A. Developers should use plugins from a variety of JavaScript libraries to ensure compatibility.
- B. Developers should become familiar with one library then optimize HTML code with that specific library in mind.
- C. Developers should link to the library file and to each plug in script in the <head> section of the HTML document using the <script> tag.
- D. Developers should ensure the library functions they use are cross-browser compatible for the version of HTML they are using.
正解: D
質問 39
Consider the following code:
Charies wants to write code to execute the changeOption function after the user chooses an option in the select menu. What change to the code should he make?
- A. Change line 7 <select name=''mySelectBox '' onchange=changeOption () ">
- B. Change line 6 to <form name="myform'' cosubmit=''changeOption ( ) ''>
- C. Change line 6 to <input type="submit'' onchange=''changeOption () '' />
- D. Change line 2 to function changeOption (onchange){
正解: A
質問 40
Loni needs to create a scriptable button in her Web form that does not submit the form but instead, calls a custom function What HTML code should she use?
A)
B)
C)
D)
- A. Option D
- B. Option B
- C. Option A
- D. Option C
正解: D
質問 41
Consider the following code:
The processform() function is not executed when the submit button is pressed. What change should be made to correct this?
- A. The onfocus event handler should be added to the <form> tag.
- B. The onfocus event handler should be added to the <input type'' submit''> tag
- C. The onsubmit event handler should be added to the <input type='' submit''> tag.
- D. The onsubmit event handler should be added to the<form> tag.
正解: C
質問 42
Laurie has been instructed to add code to a Web page to display the date and time when the document was last updated Which code should she use?
- A. document.write ("Last Updated " + document . lastModified) ;
- B. document.write("Last Updated '' navigator.appVersion);
- C. document.write("Last Updated Updated '' + history.length);
- D. document.write("Last Updated '' + new Date());
正解: B
質問 43
What is the best practice for testing code to pinpoint a logic error within a script?
- A. Check for console errors when loading the page.
- B. Test the code in the W3C code validator.
- C. Insert watchpoints and comment out code blocks.
- D. Conduct a manual, line-by-line, code review.
正解: C
質問 44
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