这些javascript面试题,你做对了几道?

时间:2021-11-25 23:59:22

1.----------------------------------------------------

var fun = function(){
this.name = 'peter'; return {
name: 'jack'
}; } var p = new fun();

请问p.name是:

a:'peter', b:'jack', c:null, d:undefined

2.----------------------------------------------------

var fun = function(){
this.name = 'peter'; return 'jack';
} var p = new fun();

请问p.name是:

a:'peter', b:'jack', c:null, d:undefined

3.----------------------------------------------------

var fun = function(){

}

fun.prototype = {
info : {
name : 'peter',
age : 25
}
} var a = new fun();
var b = new fun(); a.info.name = 'jack';
b.info.name = 'tom';

请问a.info.name和b.info.name分别是:

a:'jack', 'tom', b:'jack', 'jack', c:'tom','tom', d:'tom', 'jack'

4.----------------------------------------------------

var fun = function(){
this.info = {
name : 'peter',
age : 25
}
} var a = new fun();
var b = new fun(); a.info.name = 'jack';
b.info.name = 'tom';

请问a.info.name和b.info.name分别是:

a:'jack', 'tom', b:'jack', 'jack', c:'tom','tom', d:'tom', 'jack', e:其它

5.----------------------------------------------------

var fun = function(){

}

fun.prototype = {
name : 'peter',
age : 25
} var a = new fun();
var b = new fun(); a.name = 'jack';
b.name = 'tom';

请问a.name和b.name分别是:

a:'jack', 'tom', b:'jack', 'jack', c:'tom','tom', d:'tom', 'jack', e:其它

6.----------------------------------------------------

var fun = function(){
this.info = {
name : 'peter',
age : 25
}
} fun.prototype = {
info : {
name : 'peter',
age : 25
}
} var a = new fun();
var b = new fun(); a.info.name = 'jack';
b.info.name = 'tom';

请问a.info.name和b.info.name分别是:

a:'jack', 'tom', b:'jack', 'jack', c:'tom','tom', d:'tom', 'jack'