In a binary systems, a zero bit represents a switch in the ____ position, and a one bit represents a switch in the ____ position.

a. on, off
b. off, on
c. neutral, binary
d. positive, negative


b. off, on

Computer Science & Information Technology

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A file server uses caching, and achieves a hit rate of 80%. File operations in the server cost 5 ms of CPU time when the server finds the requested block in the cache, and take an additional 15 ms of disk I/O time otherwise. Explaining any assumptions you make, estimate the server’s throughput capacity (average requests/sec) if it is:

i) single-threaded; ii) two-threaded, running on a single processor; iii) two-threaded, running on a two-processor computer.

Computer Science & Information Technology

The table below lists customer/car hire data. Each customer may hire cars from various outlets throughout Glasgow. A car is registered at a particular outlet and can be hired out to a customer on a given date.

![15237|637x171](upload://jTQvphC8e5yNPalkIuWgHxdNOhl.png) (a) The data in the table is susceptible to update anomalies. Provide examples of how insertion, deletion, and modification anomalies could occur on this table. (b) Identify the functional dependencies represented by the data shown in the table. State any assumptions you make about the data. (c) Using the functional dependencies identified in part (b), describe and illustrate the process of normalization by converting Table 1 to Third Normal Form (3NF) relations. Identify the primary and foreign keys in your 3NF relations.

Computer Science & Information Technology

HTML tags do not conform to the rules of JavaScript syntax; therefore, the JavaScript interpreter cannot process them.

Answer the following statement true (T) or false (F)

Computer Science & Information Technology

As per the accompanying figure, Blogger's servers host the news content displayed in the sidebar gadget embedded in this blog post.

Answer the following statement true (T) or false (F)

Computer Science & Information Technology