JavaScript Course | Practice Quiz-3

Question 1

What will be the output of the following code? 

JavaScript

<script>
let result = 0;
for (let i = 0; i < 5; i++) {
  result += i;
}
document.write(result);
</script>

• 5

• 0

• 10

• None of the above

Question 2

True or false: All keys in an object are strings.

• True
• False
• Depends on the Object type
• None of the above

Question 3

Given a collection of artists and lists of their songs, would you store the artist-song-list pairs in an Object or an Array?

• Object
• Array
• Function
• None of the above

Question 4

What will be the output of the following code?

JavaScript

 <script>
 if (5) { 
  document.write(\"I like peanuts\"); 
  }
  </script>

• I like peanuts
• undefined
• nothing will be printed
• None of the above

Question 5

What will be the output of the following code?

JavaScript

<script>
let bar  = 1;
foo = {};
foo: {
     bar : 2;
     baz : ++bar;
};
document.write(foo.baz + foo.bar + bar);
</script>

• NaN
• 5
• 4
• 1

Question 6

What will be the output of the following code? 

< script>

document.write( 10 > 9 > 8 === true );

</ script> 

• true

• false

• 1

• 0

Question 7

What will be the output of the following code?

JavaScript

<script>
  document.write(String(\'Hello\') == \'Hello\');
</script>

• true
• false
• 1
• 0

Question 8

What will be the output of the following code?

JavaScript

<script>
document.write(( true + false ) > 2 + true );
</script>

• true
• false
• 1
• 0

Question 9

What will be the output of the following code?

JavaScript

<script>
document.write(Number(\'1\') - 1 == 0);
</script>

• true
• false
• 1
• None of the above

Question 10

What will be the output of the following code?

JavaScript

<script>
 document.write(NaN == NaN);
</script>

• true
• false
• 1
• 0