Fundamentals of Front End Development MCQs with Answers
Practice important Fundamentals of Front End Development MCQs with answers and explanations.
Chapter: 93
Q1041:
Fill in the blank: The XMLHttpRequest method ______ sends the request to the server.
A. open()
B. setRequestHeader()
C. send()
D. get()
Correct Answer:
C
Chapter: 93
Q1042:
What is the difference between GET and POST requests in XMLHttpRequest?
A. GET is used for larger data, POST for smaller data
B. POST can send larger amounts of data, GET is simpler and faster
C. GET is used for server-side processing, POST for client-side
D. GET and POST are interchangeable
Correct Answer:
B
Chapter: 93
Q1043:
Fill in the blank: If the async parameter is set to false in XMLHttpRequest, JavaScript will ______ until the server response is ready.
A. stop execution
B. continue execution
C. execute in parallel
D. not wait
Correct Answer:
A
Chapter: 93
Q1044:
What does the onreadystatechange event handle in XMLHttpRequest?
A. The server response
B. The request headers
C. The request URL
D. The request type
Correct Answer:
A
Chapter: 93
Q1045:
Fill in the blank: The method ______ is used to specify the request type and URL in XMLHttpRequest.
A. setRequestHeader()
B. send()
C. open()
D. get()
Correct Answer:
C
Chapter: 93
Q1046:
What does the readyState property in XMLHttpRequest indicate?
A. The URL of the request
B. The status of the request
C. The state of the request
D. The type of request
Correct Answer:
C
Chapter: 93
Q1047:
Fill in the blank: To send data in a POST request, use the syntax ______.
A. xhttp.send()
B. xhttp.open("POST", "url", true)
C. xhttp.send("data")
D. xhttp.open("GET", "url", true)
Correct Answer:
C
Chapter: 93
Q1048:
What does the setRequestHeader() method do in XMLHttpRequest?
A. Adds HTTP headers to the request
B. Sends data to the server
C. Sets the request type
D. Opens the request
Correct Answer:
A
Chapter: 94
Q1049:
What property of the XMLHttpRequest object is used to get the response data as a string?
A. responseText
B. responseXML
C. responseData
D. responseString
Correct Answer:
A
Chapter: 94
Q1050:
What event is triggered every time the readyState property changes?
A. onreadystatechange
B. onload
C. onresponse
D. onstatuschange
Correct Answer:
A
Chapter: 94
Q1051:
Fill in the blank: The readyState property value of 3 indicates that the request is ______.
A. not initialized
B. server connection established
C. request received
D. processing request
Correct Answer:
D
Chapter: 94
Q1052:
What status code indicates that the request was successful?
A. 404
B. 500
C. 200
D. 301
Correct Answer:
C
Chapter: 94
Q1053:
Which property should be checked to confirm that the request has been completed successfully?
A. status
B. readyState
C. responseText
D. responseXML
Correct Answer:
A
Chapter: 94
Q1054:
Fill in the blank: When the readyState is 1, it means that the ______.
A. server connection is established
B. request is received
C. request is not initialized
D. response is ready
Correct Answer:
A
Chapter: 94
Q1055:
What method is used to retrieve the response data in XML format?
A. responseText
B. responseXML
C. getResponse()
D. fetchXML()
Correct Answer:
B
Chapter: 94
Q1056:
Fill in the blank: The onreadystatechange event handler is used to perform actions when the ______ changes.
A. responseText
B. status
C. readyState
D. URL
Correct Answer:
C
Chapter: 94
Q1057:
Fill in the blank: When readyState is 2, it means the request has been ______.
A. completed
B. initialized
C. received
D. processed
Correct Answer:
C
Chapter: 94
Q1058:
Fill in the blank: The status code of 200 means that the request was ______.
A. not found
B. redirected
C. successful
D. server error
Correct Answer:
C
Chapter: 94
Q1059:
What is the purpose of checking xhttp.readyState == 4 in an AJAX request?
A. To ensure the response is successfully processed
B. To check if the request is initialized
C. To determine if the response is in XML format
D. To verify the request URL
Correct Answer:
A
Chapter: 95
Q1060:
What is a callback function?
A. A function that is called automatically
B. A function passed as a parameter to another function
C. A function that handles errors
D. A function that initializes XMLHttpRequest
Correct Answer:
B