更多"[单选题](单选题)下面的代码输出的结果是()Var name='To"的相关试题:
[单选题]【单选题】
(单选题)下面的代码输出的结果是()
Var name="Tom";
Function foo(){
Console.log(name);
Var name="Jerry";
Console.log(name);
}
Foo();
A.undefined
"Jerry"
B."Tom"
"Jerry"
C."Tom"
Undefined
D."Jerry"
"Jerry"
[单选题]分析下面的JavaScript代码段，输出结果是( )
var mystring="I am a student";
a=mystring.charAt(9);
document.write(a);
A.I am a st
B.U
C.Udent
D.T
[单选题]分析下面的 Javascript 代码段，输出结果是（)
var mystring=”I am a student”;
var a=mystring.substring(9,13);
document.write(a);
A.stud
B.tuden
C.uden
D.udent
[单选题]分析下面的 Javascript 代码段，输出结果是（）
var s1=parseInt(“101 中学”);
document.write(s1);
A.NaN
B.101 中学
C.101
D.出现脚本错误
[单选题]分析下面的 JavaScript 代码段：
function employee(name,code)
{
this.name="wangli";
this.code="A001";
}
newemp=new employee("zhangming",'A002');
document.write("雇员姓名:"+ newemp.name+ "
");
document.write("雇员代号:"+ newemp.code +"
");
输出的结果是().
A.雇员姓名:wangli 雇员代码:A001
B.雇员姓名：zhangming 雇员代码：A002
C.雇员姓名：null, 雇员代码：null
D.代码有错误，无输出结果
[单选题]下面这个 JS 程序的输出是什么：
function Foo() {
var i = 0;
return function() { console.log(i++);
}
}
var f1 = Foo(),
f2 = Foo();
f1();
f1();
f2();
A.0 1 0
B.0 1 2
C.0 0 0
D.0 0 2
[单选题]
(单选题)下面运行的结果是()
Var v1 = []
Var v2 = {};
Var v3 = {};
Function foo(v1, v2, v3)
{
V1 = [1];
V2 = [2];
V3 = {a:3}
}
Foo(v1, v2, v3);
Alert (v1);
Alert (v2);
Alert (v3.a);
A.空白
[object Object]
Undefined
B.1
2
3
C.空白
2
3
D.空白
2
Undefined
[单选题]
(单选题)以下代码的运行结果是(),var a="12px";var b=3;console.log(a+b);console.log(Number(a));
A.15px/12
B.12px3/12
C.15px/NaN
D.12px3/NaN
[单选题]【单选题】
(单选题)以下代码的运行结果是(),
Var x=true+1;
Var y=true+"1";
Var z=true+1+"1";
Console.log(x+","+y+","+z);
A."true1","true1","true2"
B.2,"true1","true11"
C.2,2,3
D.2,"true1","21"
[单选题]
(单选题)以下代码的运行结果是(),
Var x=true+1;
Var y=true+"1";
Var z=true+1+"1";
Console.log(x+","+y+","+z);
A."true1","true1","true2"
B.2,"true1","true11"
C.2,2,3
D.2,"true1","21"
[单选题]下面代码的输出结果是:()
Public class Main {
Public static void main(String[] args) {
Int n1 = 1;
Int n2 = 2;
N1 = n1 + n2;
N2 = n1 - n2;
N1 = n1 - n2;
System.out.println(n1 + "," + n2);
}
}
A. 1,2
B. 2,1
C. 1,3
D. 3,2
[单选题]【单选题】
(单选题)以下代码的运行结果是(),var a="12px";var b=3;console.log(a+b);console.log(Number(a));
A.15px/12
B.12px3/12
C.15px/NaN
D.12px3/NaN
[单选题]
(单选题)以下代码的输出结果是()
Var f = function g() {
Return 23;
};
Typeof g();
A."number"
B."undefined"
C."function"
D.Error
[单选题]
(单选题)以下代码的运行结果是(),
Var scope="global";
Function checkscope(){
Scope="local";
Myscope="local";
Return [scope,myscope]
}
Console.log(checkscope());
Console.log(scope);
Console.log(myscope);
A.先后输出值为["global","local"],global,local
B.先后输出值为["local","local"],local,local
C.先后输出值为["local","global"],global,local
D.先后输出值为["global","global"],local,local
[单选题]【单选题】
(单选题)下面运行的结果是()
Var v1 = []
Var v2 = {};
Var v3 = {};
Function foo(v1, v2, v3)
{
V1 = [1];
V2 = [2];
V3 = {a:3}
}
Foo(v1, v2, v3);
Alert (v1);
Alert (v2);
Alert (v3.a);
A.空白
[object Object]
Undefined
B.1
2
3
C.空白
2
3
D.空白
2
Undefined
[单选题]
(单选题)以下代码的输出结果是(),
Var scope="global scope";
Function checkscope(){
Var scope="local scope";
Function nested(){
Var scope="nested scope";
Return scope;
}
Return nested();
}
Console.log(checkscope());
A."global scope"
B."local scope"
C."nested scope"
D.null
[单选题]var myObject = {
foo: "bar",
func: function() { var self = this;
console.log(this.foo);
console.log(self.foo);
(function() {
console.log(this.foo);
console.log(self.foo);
}());
}
};
myObject.func();
程序的输出是什么？
A.bar bar bar bar
B.bar bar bar undefined
C.bar bar undefined bar
D.undefined bar undefined bar
