Discuss the trade-offs between a manual challenge response system (one to which the user computes the response by hand or mentally) and a system that uses a special device, like a calculator.
What will be an ideal response?
Manual: can be completed by individual alone, but limited to the kinds of functions ordinary people can compute in their heads.
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For each of the following situations, tell which type loop (while, do-while, or for) would be best in that situation:
a) Reading a list of an unknown number of homework grades for a single student. b) Summing a series such as 1 +1/2 +1/(22) + 1/(23) + … + 1/(28) c) Testing a newly coded library function to see how it performs for different values of its arguments. d) Reading in the number of days of vacation taken by an employee.
Match each item with a statement below.
A. An NIS map that contains group-related information. B. An NIS map that contains user attributes. C. An NIS map that contains encrypted passwords for users whose attributes are in the /etc/passwd file. D. An NIS map that is used with the mail service. E. An NIS map that contains hostnames and IP addresses of computers connected over a TCP/IP network. F. An NIS map that contains NIS network names. G. An NIS map that identifies the names and numbers assigned to network protocols. H. An NIS configuration file that is used to push updated maps to the NIS slave server. I. An NIS configuration file that specifies NIS clients' access rights to the NIS server.