更多"[单选题]【单选题】(单选题)下面的代码输出的结果是()Var nam"的相关试题:
[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]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)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]【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]【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)以下代码的输出结果是(),var i=1,b=++i,c=i++;console.log(i+","+b+","+c);
A.1,2,3
B.2,2,3
C.1,2,2
D.3,2,2
[单选题]分析下面的JavaScript代码段,输出的结果是( )。
emp=new Array(5);
emp[1]=1;
emp[2]=2;
document.write(emp.length);
A.2
B.3
C.4
D.5
[单选题]【单选题】
(单选题)以下代码的输出结果是(),var i=1,b=++i,c=i++;console.log(i+","+b+","+c);
A.1,2,3
B.2,2,3
C.1,2,2
D.3,2,2
[单选题]假设今天是2006年4月1日星期六,请问以下javascript代码输出结果是:( )
var time = new Date( );
document.write(time.getMonth( ));
A.3
B.4
C.5
D.2
[单选题]如下代码输出的结果是什么:
console.log(1+ "2"+"2");
console.log(1+ +"2"+"2");
console.log("A"- "B"+"2");
console.log("A"- "B"+2);
A.122 122 NaN NaN
B.122 32 NaN NaN2
C.122 32 NaN2 NaN
D.122 32 NaN2 NaN2
[单选题]下列代码的输出结果是 : ( )
class Parent{
void printMe() {
System.out.println("parent");
}
};
class Child extends Parent {
void printMe() {
System.out.println("child");
}
void printall() {
super.printMe();
this.printMe();
printMe();
}
}
public class Test_this {
public static void main(String args[]) {
Child myC=new Child();
myC.printall();
}
}
A.parent
child
child
B.parent
child
parent
C.parent
child
D.编译错误
[单选题]下面代码的输出结果为
int func(int x)
{
int countx =0;
while(x)
{
countx ++;
x = x&(x-1);
}
return countx;
}
int main()
{
cout<A.255
B.8
C.12
D.6
[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