1804887
Beschreibung
Quiz von Rene Escobar, aktualisiert more than 1 year ago
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Erstellt von Rene Escobar
vor fast 10 Jahre
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Frage 1
Frage
Which of these variables are not valid in Javascript?
Antworten
-
4_colors
-
Color
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color
-
$color
Frage 2
Frage
What happens when you declare a variable like
var myVar;
Antworten
-
The variable value(output) is set to undefined
-
The variable value(output) is set to null
Frage 3
Frage
What are some of the main differences between null and undefined?
Antworten
-
Null is used to tell the program that a value is truly empty
-
Unlike undefined, null is a falsy value
-
typeof null will return "Object" and typeof undefined returns "undefined"
Frage 4
Frage
=== operator is less strict in terms of identifying equality than ==
Antworten
- True
- False
Frage 5
Frage
Variables created inside of a function can only be used within the function
Antworten
- True
- False
Frage 6
Frage
Which var world is considered to have a global scope?
Antworten
-
var date; function sayHello(){ }
-
function sayHello(){ var date; }
Frage 7
Frage
What will console log out in the following code?
var part1 = "Team ";
function bam() {
var part2 = "Treehouse";
console.log(part2);
}
bam();
Antworten
-
Treehouse
-
Undefined
-
Team
Frage 8
Frage
Declaring a variable without a var keyword will evaluate the variable with global scope
Antworten
- True
- False
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