Tag: javascript

Questions Related to javascript

Inside which HTML element do we put the JavaScript?
javascript
Show answer
Correct Option: C
Explanation:

To include JavaScript code in an HTML document, we use the element. Therefore, the correct answer is:

The Answer is: C. <script>

What is the correct JavaScript syntax to write "Hello World"?
javascript

  1. response.write("Hello World")

  2. document.write("Hello World")

  3. ("Hello World")

  4. echo("Hello World")

Show answer
Correct Option: B

How do you call a function named "myFunction"?

javascript

  1. call function myFunction

  2. myFunction()

  3. call myFunction()

Show answer
Correct Option: B
Explanation:

To call a function named "myFunction", the user needs to use the following syntax: 

myFunction();

Option A is incorrect because it is not the correct syntax for calling a function.

Option B is the correct answer because it calls the function "myFunction" using the proper syntax.

Option C is incorrect because it includes the word "call", which is not necessary when calling a function in most programming languages.

Therefore, the answer is: B. myFunction()

How do you write a conditional statement for executing some statements only if "i" is equal to 5?
javascript

  1. if i==5 then

  2. if i=5 then

  3. if (i==5)

  4. if i=5

Show answer
Correct Option: C
Explanation:

To write a conditional statement for executing some statements only if "i" is equal to 5, you need to use the correct syntax.

The correct syntax for a conditional statement in most programming languages is: 

if (condition) {
    // statements to be executed if the condition is true
}

Now let's analyze each option and determine if it is the correct way to write the conditional statement:

A. if i==5 then - This option is incorrect because the syntax is incorrect. The correct syntax for the condition should be enclosed in parentheses, like if (i == 5).

B. if i=5 then - This option is incorrect because the syntax is incorrect. To check for equality, you need to use a double equals sign (==) instead of a single equals sign.

C. if (i==5) - This option is correct. It uses the correct syntax for a conditional statement. The condition i == 5 checks if the variable i is equal to 5.

D. if i=5 - This option is incorrect because the syntax is incorrect. To check for equality, you need to use a double equals sign (==) instead of a single equals sign.

Therefore, the correct option is:

The Answer is: C. if (i==5)

How do you write a conditional statement for executing some statements only if "i" is NOT equal to 5?
javascript

  1. if (i <> 5)

  2. if (i != 5)

  3. if =! 5 then

  4. if <> 5

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Correct Option: B

How many different kind of loops are there in JavaScript?
javascript

  1. Two. The "for" loop and the "while" loop

  2. Four. The "for" loop, the "while" loop, the "do...while" loop, and the "loop...until" loop

  3. One. The "for" loop

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Correct Option: A

How does a "for" loop start?
javascript

  1. for (i = 0; i <= 5)

  2. for (i = 0; i <= 5; i++)

  3. for i = 1 to 5

  4. for (i <= 5; i++)

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Correct Option: B

What is the correct way to write a JavaScript array?

javascript

  1. var txt = new Array(1:"tim",2:"shaq",3:"kobe")

  2. var txt = new Array="tim","shaq","kobe"

  3. var txt = new Array("tim","shaq","kobe")

Show answer
Correct Option: C

AI Explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) var txt = new Array(1:"tim",2:"shaq",3:"kobe") This option is incorrect because when using the new Array() syntax, you should not specify the indices explicitly. Instead, you can initialize the array directly with the values.

Option B) var txt = new Array="tim","shaq","kobe" This option is incorrect because the syntax is incorrect. When creating a new array, you should use parentheses to enclose the values, not an equal sign.

Option C) var txt = new Array("tim","shaq","kobe") This option is correct because it uses the correct syntax for creating a JavaScript array. The values are enclosed in parentheses, and each value is separated by a comma.

The correct answer is C. This option is correct because it follows the correct syntax for creating a JavaScript array using the new Array() syntax.

How do you round the number 8.25, to the nearest whole number?
javascript

  1. Math.rnd(8.25)

  2. Math.round(8.25)

  3. round(8.25)

  4. rnd(8.25)

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Correct Option: B

How do you find the largest number of 6 and 8?
javascript

  1. Math.max(6,8)

  2. top(6,8)

  3. ceil(6,8)

  4. Math.ceil(6,8)

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Correct Option: A