Consider the following snippet code
The result would be
var string1 = ”123”;
var intvalue = 123;
alert( string1 + intvalue );
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JavaScript · all questionsBasic And Variables
Basic And Variables
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
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A function definition expression can be called
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The property of a primary expression is
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Consider the following statements
In order to check if the pattern matches with the string “text”, the statement is
var text = "testing: 1, 2, 3"; // Sample text
var pattern = /d+/g // Matches all instances of one or more digitsSelect an option to see the answer and solution.
The JavaScript’s syntax calling ( or executing ) a function or method is called
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What kind of an expression is “new Point(2,3)”?
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Which of the operator is used to test if a particular property exists or not?
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Among the following, which one is a ternary operator?
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“An expression that can legally appear on the left side of an assignment expression.” is a well known explanation for variables, properties of objects, and elements of arrays. They are called
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JavaScript is a _______________ language
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The output for the following code snippet would most appropriately be
var a=5 , b=1
var obj = { a : 10 }
with(obj)
{
alert(b)
}Select an option to see the answer and solution.
The output for the following code snippet would most appropriately be
var a=5 , b=1
var obj = { a : 10 }
with(obj)
{
alert(b)
}Select an option to see the answer and solution.
A conditional expression is also called a
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Which is a more efficient code snippet ?
Code 1 :
Code 2 :
Code 1 :
for(var num=10;num>=1;num--)
{
document.writeln(num);
}Code 2 :
var num=10;
while(num>=1)
{
document.writeln(num);
num++;
}Select an option to see the answer and solution.
A statement block is a
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When an empty statement is encountered, a JavaScript interpreter
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The “var” and “function” are
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Consider the following statements
In the above switch syntax, the expression is compared with the case labels using which of the following operator(s) ?
switch(expression)
{
statements
}Select an option to see the answer and solution.
Consider the following statements
In the above code snippet, what happens?
var count = 0;
while (count < 10)
{
console.log(count);
count++;
}Select an option to see the answer and solution.
The enumeration order becomes implementation dependent and non-interoperable if :
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