Javascript MCQ - English

Consider the following code snippet
function printArray(a)
  {
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Consider the following code snippet

function printArray(a)
  {
      var len = a.length, i = 0;
      if (len == 0)
         console.log("Empty Array");
      else
       {
          do
           {
              console.log(a[i]);
          }
 while (++i < len);
      }
 }

What does the above code result?

Prints the numbers in the array in order
Prints the numbers in the array in the reverse order
Prints 0 to the length of the array
Prints “Empty Array”

Answer : A
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1) Consider the following code snippet

function tail(o)
{
      for (; o.next; o = o.next) ;
     return o;
 }

Will the above code snippet work? If not, what will be the error?

No, this will throw an exception as only numerics can be used in a for loop
No, this will not iterate
Yes, this will work
No, this will result in a runtime error with the message “Cannot use Linked List”

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2) Consider the following code snippet

function f(o)
  {
      if (o === undefined)
 debugger;
 }

What could be the task of the statement debugger?

It does nothing but a simple breakpoint
It debugs the error in that statement and restarts the statement’s execution
It is used as a keyword that debugs the entire program at once
All of the mentioned

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3) What will be the step of the interpreter in a jump statement when an exception is thrown?

The interpreter stops its work
The interpreter throws another exception
The interpreter jumps to the nearest enclosing exception handler
None of the mentioned

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4) What will happen if the body of a for/in loop deletes a property that has not yet been enumerated?

The property will be stored in a cache
The loop will not run
That property will not be enumerated
All of the mentioned

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5) Consider the following code snippet

while (a != 0)
 {
    if (a == 1)
         continue;
    else
         a++;
 }

What will be the role of the continue keyword in the above code snippet?

The continue keyword restarts the loop
The continue keyword skips the next iteration
The continue keyword skips the rest of the statements in that iteration
None of the mentioned

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