Questions and Correct Answers / Verified Answers / Graded A+
/ 2025 Latest Exam!!
how to execute python program with out typing python -
ANSWER-script is
made executable: chmod +x
<filename>
why do sometimes we include parenthesis in class
declarations in python -
ANSWER-to inherit
parent class
why no new key word when instantiating objects in python -
ANSWER-object
constructor creates new object and calls the
__init__ method
the protocol stack - ANSWER-communication protocols that
are built on top of
,each other, lowest level communicate bytes, higher levels give
fault tolerance,
highest levels are app
specific
IP - ANSWER-internet protocol:
relays datagrams across networks, routing functionality, basis
of the internet
TCP - ANSWER-transmission control
protocol
adds reliability, ordering, and error
checking
UDP - ANSWER-user datagram
protocol:
doesn't include the reliability, faster, used
on gaming
HTTP - ANSWER-hyper text transmission protocol
SQL (Structured Query Language) - ANSWER-set of
commands for defining
and managing relational
databases
, relational database - ANSWER-A database that represents data
as a collection of tables in which all data relationships are
represented by common values in related tables
are standards good? the good points - ANSWER-reduce
training costs promote application protability promote
application longevity easy for intersystem
communication good for customer choice
standards? the bad points - ANSWER-standards can stifle
creativity, SQL has
some severe flaws to its
design
tables in SQL - ANSWER-unordered collection of rows, can
be thought of as
files where rows are records and columns
are fields
how are SQL statements invoked - ANSWER-interactively or
from within an application (interactive displays results on
screen, invocation means results are input to program)
Primary keys - ANSWER-columns in the table with unique rows