Which of the following statements are true and which are false? Add circles around the selected answers. Note that each wrong answer cancels a correct one. 1. A hub contains more advanced features...

Extracted text: Which of the following statements are true and which are false? Add circles around the selected answers. Note that each wrong answer cancels a correct one. 1. A hub contains more advanced features than a switch. True False 2. The last node of a circular linked list contains pointer to the null. True False 3. The physical topology describes the communication mechanism used by devices for the transmission of the data. True False 4. In CSMA CD, collision is avoided by checking whether the transmission media is busy or not. True False 5. A peer-to-peer network is more expensive than a client/server one. True False 6. In bus topology, a failure in one node will not have any effect on other nodes. True False 7. The most common access method of the ring topology is token passing. True False 8. One of the disadvantages of star topology is a central point of failure. True False 9. Tree topology combines the characteristics of bus topology and star topology. True False 10. A walkie-talkie is an example of the half-duplex mode. True False 11. The size of an array must be known in advance before using it in the program. True False 12. A node in the singly linked list consists of two parts: data part and link part. True False 13. In the hierarchical data model, files are related in a parent/child manner. True False 14. A relational database uses SQL for storing, manipulating, as well as maintaining the data. True False 15. One of the limitations of the network data model is the difficulty to design and maintain. True False Page 2 of 4 16. The last node of a circular linked list contains pointer to the null. True False 17. Pop() is one of the basic operations that are performed on a queue. True False 18. A queue that is implemented by using a linked list causes memory wastage. True False 19. A binary tree with n leaves has (2n - 1) nodes. True False 20. Height of a node is the number of edges from the root node to that node. True False