
Quizz_Array
Quiz
•
Education
•
1st - 5th Grade
•
Practice Problem
•
Hard
Bach Nguyen
Used 2+ times
FREE Resource
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15 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Vòng lặp nào sau đây sẽ chạy 25 lần?
for ( var i = 1; i < 26; i ++ )
for ( var i = 30 ; i > 5 ; i -- )
for(var i=0; i<25; i++)
for ( var i = 25 ; i > 0 ; i -- )
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kết quả đoạn code sau là gì?
console.log("22" < "134");
True
False
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu lệnh nào dưới đây trả về kết quả "false"?
'myName'.length > 2
'inputControl'.length < 4
3 * 4 < 15
3*5 <= 15
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kết quả của đoạn code sau là ?
console.log(-(--a) * ++a - a);
var a = 3;
-9
4
NaN
undefined
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cho đoạn code sau, đâu là đáp án đúng?
const fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.splice(2, 0, "Lemon", "Kiwi");
Banana,
Orange,
Apple,
Lemon,
Kiwi,
Apple,
Mango
Banana,
Orange,
Lemon,
Kiwi,
Apple,
Mango
Banana,
Lemon,
Kiwi,
Apple,
Mango
Banana,
Orange,
Apple,
Mango
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho đoạn code sau, đáp án đúng là
const fruits = ["Banana", "Orange", "Apple", "Mango", "Apple"];
let index = fruits.indexOf("Apple", 3);
1
2
3
4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho đoạn code sau, đâu là đáp án đúng?
let a = [1, 2, 3];
let b = [1, 2, 3];
let c = '1,2,3';
console.log(a == c);
console.log(b == c);
console.log(a == b);
true, true, false
true, false, false
true, true, true
false, false false
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