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Salesforce Javascript-Developer-I Exam Dumps
Salesforce Certified JavaScript Developer (JS-Dev-101)
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Javascript-Developer-I Dumps
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Salesforce Javascript-Developer-I Sample Questions
Question # 1Refer to code below: Let first = ‘who’; Let second = ‘what’; Try{ Try{ Throw new error(‘Sad trombone’); }catch (err){ First =’Why’; }finally { Second =’when’; } catch (err) { Second =’Where’; }What are the values for first and second once the code executes ?
A. First is Who and second is When
B. First is why and second is where
C. First is who and second is where
D. First is why andsecond is when
Question # 2
Refer to the code below:Function changeValue(obj) {Obj.value =obj.value/2;}Const objA = (value: 10);Const objB = objA;changeValue(objB);Const result = objA.value;What is the value of result after the code executes?
A. 10
B. Nan
C. 5
D. Undefined
Question # 3
A developer needs to test this function:01const sum3 = (arr) => (02if (!arr.length) return 0,03if (arr.length === 1) return arr[0],04if (arr.length === 2) return arr[0]+ arr[1],05 return arr[0] + arr[1] + arr[2],06 );Which two assert statements are valid tests for the function?Choose 2 answers
A. console.assert(sum3(1, ‘2’)) == 12);
B. console.assert(sum3(0)) == 0);
C. console.assert(sum3(-3, 2 )) == -1);
D. console.assert(sum3(‘hello’, 2, 3, 4)) === NaN);
Question # 4
Refer to the following code:Let obj ={Foo: 1,Bar: 2}Let output =[],for(let something in obj{ output.push(something);}console.log(output);What is the output line 11?
A. [1,2]
B. [“bar”,”foo”]
C. [“foo”,”bar”]
D. [“foo:1”,”bar:2”]
Question # 5
A developer implements and calls the following code when an application state changeoccurs:Const onStateChange =innerPageState) => {window.history.pushState(newPageState, ‘ ’, null);}If the back button is clicked after this method is executed, what can a developer expect?
A. A navigate event is fired with a state property that details the previous application state.
B. The page is navigated away from and the previous page in the browser’s history isloaded.
C. The page reloads and all Javascript is reinitialized.
D. A popstate event is fired with a state property that details the application’s last state.
Question # 6
Which three actions can be using the JavaScript browser console?Choose 3 answers:
A. View and change DOM the page.
B. Display a report showing the performance of a page.
C. Run code that is not related to page.
D. view , change, and debug the JavaScript code of the page.
E. View and change security cookies.
Question # 7
Refer to the code below:<html lang=”en”><table onclick=”console.log(Table log’);”><tr id=”row1”><td>Click me!</td></tr><table><script>function printMessage(event) {console.log(‘Row log’);}Let elem = document.getElementById(‘row1’);elem.addEventListener(‘click’, printMessage, false);</script></html>Which code change should be made for the console to log only Rowlog when ‘Click me! ’ isclicked?
A. Add.event.stopPropagation(); to window.onLoad event handler.
B. Add event.stopPropagation(); to printMessage function.
C. Add event.removeEventListener(); to window.onLoad event handler.
D. Addevent.removeEventListener(); toprintMessage function.