Updated Dec-2021 Exam JavaScript-Developer-I Dumps - Pass Your Certification Exam
Latest Real Salesforce JavaScript-Developer-I Exam Dumps Questions
NEW QUESTION 28
The developer has a function that prints ''Hello'' to an input name. To test this, the developer created a function that returns world''.
What can the developer do to change the code to print ''Hello world''?
- A. Change line 7 to ) () ;
- B. Change line 5 to function world () (
- C. Change line 2 to console.log ( 'Hello', name () );
- D. Change line 9 to sayhello (world () ;
Answer: A
NEW QUESTION 29
Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?
A)
B)
C)
D)
- A. Option C
- B. Option A
- C. Option B
- D. Option D
Answer: B
NEW QUESTION 30
Given the HTML below:
Which statement adds the priority-account CSS class to the Unversal Containers row?
- A. Document. querySelectorAll ( '# row-uc ') .classList. add ('priority-account');
- B. Document. queryselector ('# row-uc') ,classes. Push (' priority-account');
- C. Document. querySelector ( 'row-uc') . classList. Add ( 'pariority-account') ;
- D. Document. getElementById ( 'row-uc') addClass ( ' priority-account');
Answer: C
NEW QUESTION 31
Which statement parses successfully?
- A. JSON. parse (""foo"');
- B. JSON.parse ("foo");
- C. JSON.parse ("foo");
- D. JSON.parse (""foo'");
Answer: A
NEW QUESTION 32
Given the code block below:
What should a developer insert line 15 to output the following message using the load method?
SNENneziz is loading a cartridge game: super Monic 3x Force...
- A. Console16bit. Prototype. Load (gamename) (
- B. Console16bit. Prototype. Load = function (gamename) (
- C. Console116bit. Prototype. Load (gamename) = function () (
- D. Console16bit = object. Create (GameConsole. Prototype). Load _ function (gamename) (
Answer: B
NEW QUESTION 33
A developer implements and calls the following code when an application state change occurs:
If the back button is clicked after this method is executed, what can a developer expect?
- A. A popstate event is fired with a state properly that details the application's last state.
- B. The page is navigated away from and previous page in the browser's history is loaded.
- C. A navigate event is fired with a state properly that details previous application state.
- D. The page reloads and all JavaScript is reinitialized.
Answer: B
NEW QUESTION 34
A developer has code that calculates a restaurant bill, but generates incorrect answers while testing the code.
Which option allows the developer to step into each function execution within calculateBill?
- A. Calling the console. Trace( total ) method on line 03.
- B. Using the debugger command on line 03.
- C. Using the debugger command on line 05.
- D. Wrapping findsubtotal in a console .log method.
Answer: B
NEW QUESTION 35
Refer to the expression below:
Let x = ('1' + 2) == (6 + 2) ;
How should this expression be modified to ensure that a evaluated to false?
- A. Let x = (1' + '2') === (6 / 2) ;
- B. Let x = (1' + '2') == ('6' / 2) ;
- C. Let x = (1' + '2') === (6 + 2) ;
- D. Let x = (1' + '2') == (6 + 2) ;
Answer: C
NEW QUESTION 36
Refer to the following code block:
What is the value of output after the code executes?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION 37
Refer to the code below:
What is the output if this function when called with an empty array?
- A. Retruns 0
- B. Throws an error
- C. Return NaN
- D. Return 10
Answer: D
NEW QUESTION 38
A developer has an ErrorMandler module that contains multiple functions.
What kind of export should be leveraged so that multiple function can be used?
- A. default
- B. Multi
- C. All
- D. Named
Answer: D
NEW QUESTION 39
A developer is wondering whether to use, promise, then or provise, catch especially when a promise throws an error.
Which two promises are rejected? Choose 2 answers
- A. Promise , reject ('Cool error here ') , catch (error => console ,error (error));
- B. New promise (() => (throw 'Cool error here ')) , then ((null, error => console, (error)));
- C. Promise, rejected (Cool error here'), then (error => console (error ));
- D. New Promise((resolve, reject) => ( throw 'Cool error here')) .catch (error => console (error ));
Answer: B,D
NEW QUESTION 40
Universal Containers recently its new landing page to host crowd-function campaign. The page uses an external library to display some third-party ads. Once the page is fully loaded, It creates more than 50 new HTML items placed randomly inside the DOM, like the one in the code below.
All the elements included the same ad-library-item class. They are hidden by default, and they are randomly displayed while the user navigation through the page.
Tired of all the ads, what can the developer do to temporarily and quickly remove them?
- A. Use the DOM inspector to remove all the elements containing the call ad-library -item.
- B. Use the browser console to execute a script that removes all the elements containing the class ad-library-item.
- C. Use the browser console to execute a script that prevents the load event to be fired.
- D. Use the DOM inspector to prevent the load event to be fired.
Answer: B
NEW QUESTION 41
Given the code below:
What is the expected output?
- A. Both lines 08 and 09 are executed, and the variables are outputted.
- B. Line 08 throws an error, therefore line 09 is never executed.
- C. Both lines 06 and 09 are executed, but the values outputted are undefined.
- D. Line 08 outputs the variable, but line 09 throws an error.
Answer: D
NEW QUESTION 42
Which statement parses successfully?
- A. JSON.parse ('' 'foo' '');
- B. JSON.parse ('foo ');
- C. JSON.parse (''foo '');
- D. JSON.parse ('' 'foo'' ');
Answer: C
NEW QUESTION 43
A developer wrote a fizzbuzz function that when passed in a number, returns the following:
Fizz if the number is divisible by 3.
Buzz if the number is divisible by 5.
Fizzbuzz if the number is divisible by both 3 and 5.
Empty string if the number is divisible by neither 3 or 5.
Which two test cases will properly test scenarios for the fizzbuss function?
- A. Let res = fizzbuss (Infinity);
Console.assert (res === '' ) ; - B. Let res = fizzbuss (5) ;
Console. assert (res === '' ) ; - C. Let res = fizzbuss (3) ;
Console.assert (res === 'buzz' ) ; - D. Let res = fizzbuss (15) ;
Console. assert (res === 'fizzbuzz' ) ;
Answer: A,D
NEW QUESTION 44
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How to Prepare for Salesforce JavaScript Developer I Exam
Preparation Guide for Salesforce JavaScript Developer I Exam
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