JavaScript Course | Practice Quiz-2

Question 1

Which of the following javascript functions allows you to get user input data?

• alert
• prompt
• confirm
• None of the above

Question 2

Which logical operator only accepts a single operand?

• &&(AND)
• ||(OR)
• !(NOT)
• None of the above

Question 3

What will be the result of the following code?

Javascript

<script>
  document.write( true && 1 && 3);
</script>

• 0
• 1
• true
• 3

Question 4

What will be the output of the following code?

Javascript

 <script>
   document.write((0 && 1) || (1 || 0));
 </script>

• 0
• false
• true
• 1

Question 5

What will be the output of the following code?

Javascript

<script>
 let ans = 0 / 0;
 document.write(ans);
</script>

• 0
• infinity
• NaN
• None of the above

Question 6

What will be the output of the following code?

Javascript

<script>
 let i = 30;
  if( i == 10 || i > 20){
    console.log(\'Hola\');
  }else if( i == 5){
    console.log(\'Breaking up the code\');
  }else{
    console.log(\'Adios\');
 }
</script>

• Hola
• Breaking up the code
• Adios
• None of the above

Question 7

What will be the output of the following code?

Javascript

 <script>
   let ans = 1;
   document.write( ans === \'1\');
 </script>

• true
• false
• 0
• None of the above

Question 8

What will be the output of the following code?

Javascript

 <script>
  let age = 20;
  let result = age>18 ? \'Great\' : \'Not so great\';
  document.write(result);
 </script>

• Great
• Not so great
• true
• None of the above

Question 9

What will be the output of the following code?

Javascript

<script>
  let y = 1;
  y = typeof x; 
  document.write(typeof y);
</script>

• string
• null
• number
• boolean

Question 10

What will be the output of the following code?

Javascript

 <script>
    var x = [typeof x, typeof y][1];
    document.write(typeof typeof x);
 </script>

• undefined
• string
• number
• boolean