Javascript Loops MCQ Questions and Answers

Javascript Loops MCQ Questions and Answers

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Javascript Loops MCQ Questions and Answers : We provide quiz questions on Javascript Loops where you can learn lots of objective questions with answers and you can also download pdf of javascript.

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1) 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?

2) What are the three important manipulations done in a for loop on a loop variable?

3) 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?

4) One of the special feature of an interpreter in reference with the for loop is that

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

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

7) 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?

8) Consider the following code snippet

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

What could be the task of the statement debugger?

9) Among the keywords below, which one is not a statement?