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IOS Technical Test MCQs

Which of the following is the best practice to find active internet connection?

- (BOOL) connectedToInternet { Reachability *reachability = [Reachability reachabilityForInternetConnection]; NetworkStatus networkStatus = [reachability currentReachabilityStatus]; return !(networkStatus == NotReachable); }

- (BOOL) connectedToInternet { NSString *URLString = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"http://www.google.com"]]; return ( URLString != NULL ) ? YES : NO; }

- (BOOL) connectedToInternet { NSURL *URLString = [NSURL URLWithString:@"http://www.google.com"]; NSData *data = [NSData dataWithContentsOfURL:URLString]; if (data) return YES; else return NO; }

- (BOOL) connectedToInternet { NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL: [NSURL URLWithString:@"http://www.google.com/"]]; [request setHTTPMethod:@"HEAD"]; NSHTTPURLResponse *response; [NSURLConnection sendSynchronousRequest:request returningResponse:&response error: NULL]; return ([response statusCode] == 200) ? YES : NO; }

Answer

Correct Answer: - (BOOL) connectedToInternet { Reachability *reachability = [Reachability reachabilityForInternetConnection]; NetworkStatus networkStatus = [reachability currentReachabilityStatus]; return !(networkStatus == NotReachable); }

Explanation:

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