JavaScript Test

Question 1: JavaScript is ECMAScript

Question 2: JavaScript written under which of the following tag?

Question 3: A variable in JavaScript declared with which of the following keyword?

Question 4: Which of the followings are primitive data types in JavaScript?

Question 5: Which of the following is NOT a JavaScript object?

Question 6: Which of the following is NOT a correct way of declaring an array in JavaScript?

Question 7: What is null in JavaScript?

Question 8: Which of the following is a valid JavaScript function?

Question 9: Which of the following object represent parameters of current function inside any function?

Question 10: A function can be assigned to a variable in JavaScript.

Question 11: Which of the following is an example of anonymous function in JavaScript?

Question 12: What will 1 == "1" return?

Question 13: What is eval() in JavaScript?

It executes specified string as JavaScript code.
It returns an object representing the parsed tree of the specified JavaScript code.
It executes server side code in JavaScript.
It displays popup message.

Question 14: How to handle error in JavaScript?

Question 15: How to apply strict mode in JavaScript?

Question 16: A variable declared without var keyword inside a function will become _______ variable.

Question 17: Which of the following is not a valid keyword in JavaScript?

Question 18: What will be the output of the following JavaScript code?

x = 1;
console.log('x = ' + x);
var x;

Question 19: What will be the output of the following JavaScript code?

for(var x = 1; x < 5; x++)
    console.log(x);

Question 20: What will be the output of the following JavaScript code?

var x = 0;
do{ 
    console.log(x) 
}while(x > 0)