How well do you know the basics of Javascript

• How do you write "Hello world" to the console in Javascript?

  log.console("hello world");
  

  
  

  Hello world
  

  
  

  console.log("Hello world");
  

  
  

  log("Hello");
  

  
  
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• WhIch of the following is a valid if statement in Javascript?

  if(1<2) {
   console.log("One is less than two");
  }
  

  
  

  if 1<2
   console.log("One is less than two");
  

  
  

  if one is less than two {
   console.log("One is less than two");
  }
  

  
  
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• Which of the descriptions of the following while loop are true?

  
  

  while(true){
   console.log("Hello world");
  }
  

  The while loop has invalid syntax

  
  

  The code inside the while loop will run indefinitely

  
  

  The console.log inside the while loop will run indefinitely

  
  
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• Which of the following is a valid variable declaration in Javascript?

  var one = 1;
  

  
  

  Number one = 1;
  

  
  

  int one = 1;
  

  
  

  Number one equals 1;
  

  
  
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• Which of the following for loops will print out the following;

  1
  2
  3
  

  for(var i = 0; i<3; i++) {
   console.log(i);
  }
  

  
  

  for(var i = 1; i<3; i++) {
   console.log(i);
  }
  

  
  

  for(var i = 1; i<=3; i++) {
   console.log(i);
  }
  

  
  

  for(var i = 0; i<3; i++) {
   console.log(i);
  }
  

  
  
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• Which index do arrays start at?

  0

  
  

  1

  
  
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• Given the following object

  
  

  var dog = {
   name: "Fido"
  }
  

  How do we change the name of our dog from Fido to Cookie?

  dogName = "Cookie";
  

  
  

  dogName = "Cookie";
  

  
  

  dog.name = "Cookie";
  

  
  

  name = "Cookie";
  

  
  
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