Javascript Fundamental Practice

What is the output of this code?

• error arr[3](arr[2].address) is not a function

• hello 22 Main st

• helloundefined

• true

What is the output of this code?

• error .join() is not a function

• error .split() is not a function

• J A J A N G S I P E M B U R U

• JAJANGSIPEMBURU

What is the output of this code?

• 33

• 2

• 9

• error .sort is not invoked

const str = 'purwadhika jakarta'

How to get string "adhi"?

• str.substring(4, 7)

• str.slice(4, 7)

• str.substr(4, 8)

• str.substring(8, 4)

What is the output of this code?

• 10

  false

  NaN

• 10

  false

  2

• true

  false

  false

• true

  false

  2

What is the output of this code?

• -9

• "-9"

• 6

• undefined

What is the output of this code?

• [4,5,7,8,9,12]

• [12,9,8,7,5,4,3]

• undefined

• [3,4,5,7,8,9,12]

Which data structure maps keys to values?

• Linked List

• Queue

• Stack

• None of these answers

What is the output of this code?

• 
• 
• 
• 

What is the output of this code?

• error unexpected end of input

• tidak lengkap

• camry masih baru

• data salah