Visual Programming MCQs with Answers
Practice important Visual Programming MCQs with answers and explanations.
Multiple Choice Questions
Q761: What is the role of the showAnswer method in the quiz app?
- A: Displays the answer to the current question
- B: Logs the answer to the console and clears the question field
- C: Moves to the next question and displays its answer
- D: Resets the application to the initial state
View Answer
A
Q762: How do you initialize arrays in the init method of QuizAppDelegate?
- A: Use [NSMutableArray arrayWithObjects:@"...", @"..."]
- B: Use [[NSMutableArray alloc] init]
- C: Use [[NSArray alloc] init]
- D: Use [[NSMutableArray array] init]
View Answer
B
Q763: What happens when you call [object retain] on an object?
- A: The reference count of the object is increased
- B: The reference count of the object is decreased
- C: The object is immediately released
- D: The object is added to the autorelease pool
View Answer
A
Q764: What is the correct syntax to define an IBAction method in Objective-C?
- A: - (IBAction)methodName:(id)sender;
- B: - (void)methodName:(id)sender;
- C: - (IBAction)methodName;
- D: - (void)methodName;
View Answer
A
Q765: What is the purpose of the CLLocationManager class in the Core Location framework?
- A: To manage user interface elements
- B: To handle geographical location updates and requests
- C: To manage network connections
- D: To handle data storage operations
View Answer
B
Q766: What property is used to set the accuracy of location data in CLLocationManager?
- A: distanceFilter
- B: desiredAccuracy
- C: locationAccuracy
- D: accuracyFilter
View Answer
B
Q767: How do you start receiving location updates from CLLocationManager?
- A: Call [locationManager startUpdatingLocation]
- B: Call [locationManager stopUpdatingLocation]
- C: Set the desiredAccuracy property
- D: Call [locationManager init]
View Answer
A
Q768: Which delegate method is called when location data is updated?
- A: locationManager:didUpdateLocation:fromLocation:
- B: locationManager:didFailWithError:
- C: locationManager:didUpdateHeading:
- D: locationManager:didEnterRegion:
View Answer
A
Q769: What is the role of the didFailWithError: delegate method in CLLocationManagerDelegate?
- A: To handle errors when location updates fail
- B: To handle successful location updates
- C: To initialize the CLLocationManager
- D: To configure the accuracy of location data
View Answer
A
Q770: What is the purpose of the MKMapView class in the MapKit framework?
- A: To handle user interface layout and controls
- B: To manage and display a map view in an application
- C: To handle network requests for map data
- D: To manage user input from text fields
View Answer
B