JavaScript scope

Which statemens apply to javascript scope

var result = 4;

function calculate(x, y) {
  var x = 8;
  var result = x + y;
}

calculate(5, 10);

console.log(result);

	true	false
x in result is 5	[ ]	[x]
result in calculate function is 18	[x]	[ ]
output of console log is 18	[ ]	[x]

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Which statemens apply to javascript scope

function setUsername(name) {
  username = name;
  console.log("1:" + username);
}

setUsernama("Kate");

console.log("2:" + username);

	yes	no
output of console log 1 is undefined	[ ]	[x]
output of console log 2 is Kate	[x]	[ ]

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Which statemens apply to javascript scope

var todos = [];

function addTodo(todo) {
  todos.push(todo);
}
addTodo("Make coffee");

console.log("1:" + todos.length);

addTodo("Buy more coffee");
addTodo("Outsource node.js tasks to Chine");

console.log("2:" + todos[2]);

	yes	no
output of console log 1 is 1	[x]	[ ]
output of console log 2 is buy more coffee	[ ]	[x]

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Which statemens apply to javascript scope

	yes	no
The lifetime of a JavaScript variable starts when it is declared.	[x]	[ ]
Local variables stay in scope after the function is completed.	[ ]	[x]
Global variables are deleted when you close the page.	[x]	[ ]

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