卵が痛いJavaScriptの文法特性

知っている上に見たある人が発表したjavascriptと関係がある試験問題をみんなと共有して、N久前のことですが、これらの問題はかなり経典的です.javascriptは本当に卵が痛い言語だと思われます.
1.

 
  
   (function () { 
  
         return typeof arguments; 
  
     })(); 
   
  
    A. "object"
     B. "array"
     C. "arguments"
     D. "undefined"
 
 
 

答え:A
2.

 
  
 var f = function g() { 
  
                 return 23; 
  
             }; 
  
         typeof g(); 
   
  
        A. "number"
         B. "undefined"
         C. "function"
         D. Eorror
 
 
 

答え:D
3.

 
  
 (function (x) { 
  
             delete x; 
  
             return x; 
  
         })(1); 
   
  
        A. 1
         B. null
         C. undefined
         D. Error
 
 
 

答え:A
4.

 
  
         var y = 1, 
  
         x = y = typeof x; 
  
         x; 
   
  
        A. 1
         B. "number"
         C. undefined
         D. "undefined"
 
 
 

答え:D
5.

 
  
     (function f(f) { 
  
             return typeof f(); 
  
         })(function () { 
  
             return 1; 
  
         }); 
   
  
        A. "number"
         B. "undefined"
         C. "function"
         D. Error
 
 
 

答え:A
6.

 
  
 var foo = { 
  
             bar: function () { 
  
                 return this.baz; 
  
             }, 
  
             baz: 1 
  
         }; 
  
         (function () { 
  
             return typeof arguments[0](); 
  
         })(foo.bar); 
   
  
        A. "undefined"
         B. "object"
         C. "number"
         D. "function"
 
 
 

答え:A
7.

 
  
 var foo = { 
  
             bar: function () { 
  
                 return this.baz; 
  
             }, 
  
             baz: 1 
  
         }; 
  
         typeof (f = foo.bar)(); 
   
  
        A. "undefined"
         B. "object"
         C. "number"
         D. "function"
 
 
 

答え:A
8.

 
  
 var f = (function f() { 
  
             return "1"; 
  
         }, function g() { 
  
             return 2; 
  
         })(); 
  
         typeof f; 
   
  
        A. "string"
         B. "number"
         C. "function"
         D. "undefined"
 
 
 

答え:B
9.

 
  
  var x = 1; 
  
  if (function f() {}) { 
  
  x += typeof f; 
  
  } 
  
  x; 
   
  
 A. 1
  B. "1function"
  C. "1undefined"
  D. NaN
 
 
 

答え:C
10.

 
  
 var x = [typeof x, typeof y][1]; 
  
         typeof typeof x; 
   
  
        A. "number"
         B. "string"
         C. "undefined"
         D. "object"
 
 
 

答え:B
11.

 
  
 (function (foo) { 
  
             return typeof foo.bar; 
  
         })({ 
  
             foo: { 
  
                 bar: 1 
  
             } 
  
         }); 
   
  
        A、“undefined”
         B、“object”
         C、“number”
         D、Error
 
 
 

答え:A
12.

 
  
 (function f() { 
  
             function f() { 
  
                 return 1; 
  
             } 
  
             return f(); 
  
             function f() { 
  
                 return 2; 
  
             } 
  
         })(); 
   
  
        A、1
         B、2
         C、Error (e.g. “Too much recursion”)
         D、undefined
 
 
 

答え:B
13.

 
  
  function f() { 
  
         return f; 
  
     } 
  
     new f() instanceof f; 
   
  
    A、true
     B、false
 
 
 

答え:B
14.

 
  
 with (function(x, undefined){}) length; 
   
  
        A、1
         B、2
         C、undefined
         D、Error
 
 
 

答え:B
15.

 
  
              :（）          
  
 A.var obj = ();           
  
 B.var obj = [];        
  
 C.var obj = {};        
  
 D.var obj = //; 
  
 
 

答え:A