- A
<marquee> - B
<scroll> - C
<div> - DNone of the bove
Javascript Functions MCQ - Quiz
- AConverts a string to an integer
- B Converts an integer to a string
- CConverts a string to a float
- DNone of these
- ASplits a string into an array of substrings
- BJoins the elements of an array into a string
- CRemoves whitespace from a string
- DNone of these
- ASorts the elements of an array in ascending order
- B Sorts the elements of an array in descending order
- CSorts the elements of an array in random order
- DNone of these
- AExtracts a part of a string
- B Replaces a part of a string with a new string
- CConcatenates two strings
- DNone of these
- AEncodes a string as a URI component
- BDecodes a URI component as a string
- CRemoves special characters from a string
- Dnone of these
- AA function that returns another function
- BA function that takes another function as an argument
- CA function that does both of the above
- Dnone of these
- A A function that is defined inside another function
- BA function that has access to the outer function's variables
- C A function that is bound to an object
- DNone of these
- A the global object
- B the function itself
- Cthe object that the function is a property of
- D the object that the function is called on
- A15
- B'105'
- Cundefined
- DTypeError
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Javascript Functions MCQ - Quiz
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- A. <pre class = "prettyprint"><xmp> <marquee> </xmp></pre>
- B. <pre class = "prettyprint"><xmp> <scroll> </xmp></pre>
- C. <pre class = "prettyprint"><xmp> <div> </xmp></pre>
- D. None of the bove
Remarks:
Explanation:
The <marquee> tag is used to create a scrolling text or image in HTML. It was first introduced in Internet Explorer and was later adopted by other web browsers. However, it is considered a non-standard element and its use is not recommended because it can create accessibility issues and is not supported by all web browsers. It is better to use alternative methods to create scrolling content, such as using CSS or JavaScript. The <marquee> tag is a non-standard HTML element that is used to scroll a text or image either horizontally or vertically. In simple words, we can say that it automatically scrolls the image or text in up, down, left, and right direction.
- A. Converts a string to an integer
- B. Converts an integer to a string
- C. Converts a string to a float
- D. None of these
Remarks:
Explanation:
The parseInt() function takes a string as input and returns an integer.
If the string cannot be converted to an integer, the function returns NaN.
- A. Splits a string into an array of substrings
- B. Joins the elements of an array into a string
- C. Removes whitespace from a string
- D. None of these
Remarks:
Explanation:
The split() function splits a string into an array of substrings based on a specified delimiter.
The delimiter can be a character, a string, or a regular expression.
- A. Sorts the elements of an array in ascending order
- B. Sorts the elements of an array in descending order
- C. Sorts the elements of an array in random order
- D. None of these
Remarks:
Explanation:
The sort() function sorts the elements of an array in ascending order.
By default, it compares the elements as strings.
You can pass a comparison function as an argument to sort the elements in a different way.
- A. Extracts a part of a string
- B. Replaces a part of a string with a new string
- C. Concatenates two strings
- D. None of these
Remarks:
Explanation:
The substring() function extracts a part of a string and returns a new string.
It takes two arguments: the start index and the end index (optional).
The extracted part includes the characters from the start index to the end index (not including the character at the end index).
- A. Encodes a string as a URI component
- B. Decodes a URI component as a string
- C. Removes special characters from a string
- D. none of these
Remarks:
Explanation:
The encodeURIComponent() function encodes a string as a URI component.
It replaces certain characters (such as spaces and special characters) with their encoded version,
which can be safely used in a URI.
- A. A function that returns another function
- B. A function that takes another function as an argument
- C. A function that does both of the above
- D. none of these
Remarks:
Explanation:
A higher-order function is a function that either returns another function or takes another function as an argument, or both.
Higher-order functions are a powerful tool in functional programming because they allow you to create new functions by combining and modifying existing ones.
- A. A function that is defined inside another function
- B. A function that has access to the outer function's variables
- C. A function that is bound to an object
- D. None of these
Remarks:
Explanation:
A closure is a function that has access to the outer function's variables even after the outer function has returned.
Closures are created when a function is defined inside another function and the inner function has access to the outer function's variables.
Closures are often used to create private variables and to preserve state in callback functions.
- A. the global object
- B. the function itself
- C. the object that the function is a property of
- D. the object that the function is called on
Remarks:
Explanation:
In this case, the greet function is a property of an object, and the this keyword refers to that object.
- A. 15
- B. '105'
- C. undefined
- D. TypeError
Remarks:
Explanation:
In this case, the add function is defined before it is called, so the function call is successful and returns the sum of the two numbers, 15.