1.
Which communication mode allows both the sender and the receiver to transmit data at the same time over a single communication channel?
Answer: Option 'C'
In the simplex mode, communication is always unidirectional, for example television. In the half-duplex mode, communication is bidirectional but one at a time, which means only one of the parties can send data at a time. Walkie-talkie is an example of half duplex communication. In the full-duplex mode, communication is bidirectional, which means both the parties can transmit data simultaneously. Telephone is an example of full-duplex communication. The semi-duplex mode is not and type of communication mode.
2.
Which of the following statements is true for a piconet?
Answer: Option 'D'
Piconet is an adhoc network that works on the Bluetooth technology and connects to eight devices. It is also called personal area network (PAN). A scatternet is a type of ad hoc computer network consisting of two or more piconets.
3.
Communication channel is shared by all the machines on the network in:
Answer: Option 'C'
Broadcast networks: It have a single communication channel that is shared by all the machines on the network. Short messages, called packets in certain contexts, sent by any machine are received by all the others.
4.
What is Windows Vista?
Answer: Option 'B'
Windows Vista is an operating system, designed and marketed by Microsoft Inc.
5.
Which one of the following(s) is/are real time operating system(s)?
Answer: Option 'D'
VxWorks, Windows CE, RTLinux are real time OS.