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jscript-test-jan2025

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jscript-test-jan2025

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1. What will be the output of the following JavaScript code?
const object1 = {};
Object.defineProperties(object1,
{
property1:
{
value: 10
}
});
console.log(object1.property1);

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2. What will be the output of the following JavaScript code?
var o = new F();
o.constructor === F

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3. What is the command to run the node programs?

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4. The meaning for Augmenting classes is that ___________

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5. What will be the output of the following JavaScript code?
var string2Num=parseInt("123xyz");

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6. JavaScript is a _______________ language.

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7. The snippet that has to be used to check if “a” is not equal to “null” is _________

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8. What are the three important manipulations done in a for loop on a loop variable?

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9. The behaviour of the instances present of a class inside a method is defined by __________

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10. The keyword or the property that you use to refer to an object through which they were invoked is _________

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11. What will be the output of the following JavaScript code?
var grade='A';
var result=0;
switch(grade)
{
case 'A':
result+=10;
case 'B':
result+=9;
case 'C':
result+=8;
default:
result+=0;
}
document.write(result);

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12. A conditional expression is also called a _______________

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13. Why does the Node rely on event handlers?

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14. The pop() method of the array does which of the following task?

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15. What will be the output of the following JavaScript code?
let size = 5;
let a = 5;
for (let j = size; j >= 0; j=a) {
document.write(a);
a = a - 2;
}

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16. The object has three object attributes namely ________

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17. The unordered collection of properties, each of which has a name and a value is called _________

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18. Among the keywords below, which one is not a statement?

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19. Among the following, which one is a ternary operator?

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20. Consider the following JavaScript statement containing regular expressions and check if the pattern matches?
var text = "testing: 1, 2, 3";
var pattern = /d+/g;

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21. The basic purpose of the toLocaleString() is to _________

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22. The method that performs the search-and-replace operation to strings for pattern matching is _______

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23. A function definition expression can be called as __________

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24. What will be the role of the continue keyword in the following JavaScript code snippet?
while (a != 0)
{
if (a == 1)
continue;
else
a++;
}

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25. Will the following JavaScript code work?
var tensquared = (function(x) {return x*x;}(10));

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26. What is the command used for debugging output in Node?

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27. The method that can be used to create new properties and also to modify the attributes of existing properties is _________

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28. What is a block statement in JavaScript?

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29. What is the code to print hello one second from now?

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