Which of the following ports is used for TELNET by default?
A. 22
B. 23
C. 21
D. 20
Answer: B. 23
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Consider the relation schema corresponding to the IsA hierarchy in Figure 4.6. Assume that this schema has one relation per entity. (Consult Section 4.4 to refresh your memory about translation of IsA hierarchies into the relational model.) Write the following queries both in tuple and domain relational calculus:
a. Find the names of all sophomores in the computer science major. b. Find the names of all students in the computer science major. c. Find all departments where some technician has every specialization that any other technician (in the same or another department) has.
Service bureaus use the term _________________________ to describe those gaps in printing that are out of the printer’s register or alignment.
Fill in the blank(s) with the appropriate word(s).
Which of the following describes an item that appears between parentheses in a function's syntax?
A. data type B. relational operator C. function body D. argument
What is the minimum size of an EBS volume as per AWS?
A. 2TB B. 1GiB C. 1GB D. 1Byte