4944425
Questão 1
Questão
What is (6 * 4 + 7) % 3?
Responda
-
1
-
3
-
10
-
28
Questão 2
Questão
Which string will throw an error?
Responda
-
'"The best preparation for tomorrow is doing your best today.'"
-
"I believe in living today.\nNot in yesterday, nor in tomorrow."
-
"Nothing is impossible, the word itself says 'I'm possible'!"
-
'Believe you can and you\'re halfway there.'
Questão 3
Questão
True or false: 10 % 3 == true
Responda
- True
- False
Questão 4
Questão
True or false: (22 - 6 * 2) % 5 === false
Responda
- True
- False
Questão 5
Questão
What is the default value of a variable that is not initialized with a value?
e.g. `var myVar;` instead of `var myVar = 6;`
Responda
-
undefined
-
null
-
0
-
false
Questão 6
Questão
function double(x) {
return x * 2;
}
var x = 7;
double(5);
What is the value of `x` after the above code executes?
Responda
-
2
-
5
-
7
-
14
Questão 7
Questão
var banana = {
color: ""yellow""
}
In the above object, `color` is known as a __________. (select all that apply)
Responda
-
property
-
tag
-
key
-
value
Questão 8
Questão
Which methods *add* elements to an array? (select all that apply)
Responda
-
push()
-
unshift()
-
pop()
-
shift()
Questão 9
Questão
We use a `for` loop when...
Responda
-
we know the exact number of times to execute a block of code
-
we want to iterate through all enumerable properties
-
we don't know how many times to execute a block of code
-
we want to iterate through all numbered properties
Questão 10
Questão
Select the correct example of a `for` loop header:
Responda
-
(var k = 33; k >= 23; k--)
-
(var i = 0, i < 8, i++)
-
(x = 0; x == 10; x++)
-
(i = 10, i > 1, i - 1)
Questão 11
Questão
What does this loop do?
var array = [3, 4, 6, 23, 23, 9];
var number = 0;
for (var i = 0; i < array.length; i++) {
if (array[i] > number) {
number = array[i];
}
}
console.log(number);
Responda
-
It finds the largest number in the array
-
It finds the smallest number in the array
-
It does nothing; there is an error in the code
-
It finds if a number occurs more than once in the array
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