Visual Programming MCQs with Answers
Practice important Visual Programming MCQs with answers and explanations.
Multiple Choice Questions
Q731: How do you process a response from an AJAX request?
- A: Use a callback function to handle the response data
- B: Use response.data() to access the data
- C: Use response.text() to process the response
- D: Use response.parse() to handle the response
View Answer
A
Q732: How can you serialize form data in jQuery?
- A: Use the .serialize() method on the form element
- B: Use the .stringify() method on the form element
- C: Use the .encode() method on the form element
- D: Use the .format() method on the form element
View Answer
A
Q733: What does $.each() do with JSON data?
- A: Iterates over JSON data to process each item
- B: Encodes JSON data into a string
- C: Decodes JSON data into an object
- D: Fetches JSON data from the server
View Answer
A
Q734: What is the syntax to create a new instance of NSMutableArray in Objective-C?
- A: NSMutableArray *array = [NSMutableArray alloc];
- B: NSMutableArray *array = [[NSMutableArray alloc] init];
- C: NSMutableArray *array = [NSMutableArray init];
- D: NSMutableArray *array = [[NSMutableArray alloc] create];
View Answer
B
Q735: How do you initialize an NSMutableArray object after allocation in Objective-C?
- A: [array init]
- B: [array initialize]
- C: [[array alloc] init]
- D: [[array init] alloc]
View Answer
C
Q736: What is the method to add an object to an NSMutableArray in Objective-C?
- A: [array appendObject:object]
- B: [array addObject:object]
- C: [array insertObject:object]
- D: [array pushObject:object]
View Answer
B
Q737: How can you replace objects in a specific range of an NSMutableArray?
- A: [array replaceObjectsInRange:range withObjectsFromArray:anotherArray range:anotherRange]
- B: [array replaceObjectsInRange:anotherArray withObjectsFromArray:range]
- C: [array swapObjectsInRange:range withObjects:anotherArray]
- D: [array updateObjectsInRange:range with:anotherArray]
View Answer
A
Q738: How do you release an NSMutableArray object and avoid dangling pointers?
- A: [array release]; array = nil;
- B: [array free]; array = null;
- C: [array dispose]; array = nullptr;
- D: [array clear]; array = empty;
View Answer
A
Q739: What does the @ symbol signify when used with strings in Objective-C?
- A: Creates an NSString object directly
- B: Represents a pointer to a char array
- C: Indicates a literal NSString object
- D: Marks a string for memory management
View Answer
C
Q740: What is the correct way to declare a class method in Objective-C?
- A: + (id)methodName;
- B: - (id)methodName;
- C: + (void)methodName;
- D: - (void)methodName;
View Answer
A