Which of the following is the correct way to print out stack/trace to the console/log in Cocoa application?

Which is not a valid UIGestureRecognizer?

Which will change the placeholder text color in UITextField?

Which framework is needed to round corners of UILabel?

Which is not a valid icon size for any iOS device (iPhone, iPod, iPad)?

Select all incorrect bundle ID(s):

Consider the following code with 2 alternatives of vector operator for OpenGL ES: highp float f0,f1; highp vec4 v0, v1; Alternative 1: v0 = (v1*f0)*f1; Alternative 2: v0 = v1 * (f0 * f1); Which alternative demonstrates proper use of vector operations?

What will be the return value of CFHTTPMessageApplyCredentials function of CFHTTPMessage class if the authentication is successful?

Which type of audio files has NO size restriction?

What are universal binaries in Xcode?

Which Core Audio Services framework handles positional and lowlatency audio services in iPHone OS 4.0?