The_______ is a global standard for communications between wireless devices.
a) Wireless Application Protocol.
b) Wireless Standard Protocol.
c) WML Protocol.
d) None of the above.
a) Wireless Application Protocol.
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Which of the following mechanisms is used to calculate backoff time on an Ethernet link after a collision?
A. CSMA/CD B. CSMA/CA C. Spanning Tree D. Weighted Random Early Detect (WRED)
Which of the following statements is false?
a) C# 6’s null-conditional operator (?!) accesses a property or calls a method only if its left operand is not null; otherwise, evaluation of the expression terminates and the value of the entire expression is null. b) A nullable type is a value type that also can be null. c) You specify a nullable type by following a value type’s name with a question mark (?). d) The GetValueOrDefault method checks whether a nullable-type variable contains a value. If so, the method returns that value; otherwise, it returns the value type’s default value.