Industrial Management — Test 2

Correct Answer: A. A. 4 minutes
Explanation: We know that, Free float = Earliest start time (EST) of the head event – Earliest start time (EST) of the tail event – activity duration Free float = 10 – 2 – 4 = 4 minutes.

Correct Answer: B. B. A-e-f
Explanation: Critical activities are denoted using a thick arrow or by an arrow with double solid lines. In the given network diagram, activities A-E, E-F are critical activities. Hence, path A-E-F is the critical path.

Correct Answer: D. D. Application policies
Explanation: The various characteristics of the unused spectrum bands determined during spectrum sensing depend on the time-varying radio environment, operating frequency, bandwidth, and quality of service requirements of the cognitive radio user. Spectrum management is required to correctly associate a user to a compatible spectrum band among all available spectrum bands in xG networks.