JavaScript 小測驗
Quiz
•
Professional Development
•
Professional Development
•
Hard
Carlos Chang
Used 2+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
JavaScript 程式語言的官方正式名稱是?
Java
EcmaScript
Node.js
TypeScript
2.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
關於變數的宣告,以下哪些是正確的?
var a = 1;
let abc = "star";
const a;
var test = true;
3.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
關於資料型態,以下敘述哪些是正確的?
typeof "abc" 會得到 "string"。
typeof true 會得到 "boolean"。
typeof {} 會得到 "object"。
typeof [] 會得到 "object"。
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
var a = [1, 2, 3],如果想要移除最後一個項目,以下何者正確?
a.push();
a.pop();
a.shift();
a.unshift();
5.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
撰寫 JS 時,通常建議使用嚴格模式的語法,那在第一行要寫上什麼程式?
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
以下這個 for 迴圈,以下敘述何者錯誤?
for(let i = 0; i < 10; i++){
}
console.log(i);
這迴圈總共跑了10次。
最後的 console 印出來的 I 是 10。
這 for 迴圈可以改成用 while 迴圈來寫。
i++ 的意思等同於 i = i + 1 。
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
關於這個 add 函式,也下敘述何者錯誤?
function add(a = 1, b = 2){
return a + b;
console.log("test");
}
console.log( add(2, -5) );
console 中印出來的結果是 -3。
add 函式的兩個參數,有設定預設值。
在 console 中,會看到印出 "test"。
函式的寫法有多種,add 函式這是一個具名函式的寫法。
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