Which code statement below correctly persists an objects in local Storage ?

• A.const setLocalStorage = (storageKey, jsObject) => {
  window.localStorage.setItem(storageKey, JSON.stringify(jsObject));
  }
• B.const setLocalStorage = ( jsObject) => {
  window.localStorage.connectObject(jsObject));
  }
• C.const setLocalStorage = ( jsObject) => {
  window.localStorage.setItem(jsObject);
  }
• D.const setLocalStorage = (storageKey, jsObject) => {
  window.localStorage.persist(storageKey, jsObject);
  }

Correct Answer: A

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A developer is creating a simple webpage with a button. When a user clicks this button for the first time, a message is displayed.
The developer wrote the JavaScript code below, but something is missing. The message gets displayed every time a user clicks the button, instead of just the first time.
01 function listen(event) {
02 alert ( 'Hey! I am John Doe') ;
03 button.addEventListener ('click', listen);
Which two code lines make this code work as required?
Choose 2 answers

• A.On line 04, use event.stopPropagation ( ),
• B.On line 04, use button.removeEventListener(' click" , listen);
• C.On line 02, use event.first to test if it is the first execution.
• D.On line 06, add an option called once to button.addEventListener().

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Refer to the code below:
Let foodMenu1 = ['pizza', 'burger', 'French fries'];
Let finalMenu = foodMenu1;
finalMenu.push('Garlic bread');
What is the value of foodMenu1 after the code executes?

• A.[ 'Garlic bread']
• B.[ 'pizza','Burger', 'French fires', 'Garlic bread']
• C.[ 'Garlic bread' , 'pizza','Burger', 'French fires' ]
• D.[ 'pizza','Burger', 'French fires']

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A developer has the following array of student test grades:
Let arr = [ 7, 8, 5, 8, 9 ];
The Teacher wants to double each score and then see an array of the students who scored more than 15 points.
How should the developer implement the request?

• A.Let arr1 = arr.filter(( val) => ( return val > 15 )) .map (( num) => ( return num *2 ))
• B.Let arr1 = arr.map((num) => num*2). Filter (( val) => val > 15);
• C.Let arr1 = arr.mapBy (( num) => ( return num *2 )) .filterBy (( val ) => return val > 15 )) ;
• D.Let arr1 = arr.map((num) => ( num *2)).filterBy((val) => ( val >15 ));

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developer removes the HTML class attribute from the checkout button, so now it is simply:
<button>Checkout</button>.
There is a test to verify the existence of the checkout button, however it looks for a button with class= "blue". The test fails because no such button is found.
Which type of test category describes this test?

• A.True negative
• B.False negative
• C.True positive
• D.False positive

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