Which of the following is not a valid postfix expression?
a) 5 4 +
b) 6 5 4 + -
c) 4 + 5
d) 8 2 + 2 /
e) all of the above are valid postfix expressions
c) 4 + 5
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A type of array in which different rows can have different number of columns is called a/an:
(a) partially filled array (b) ragged array (c) initialized array (d) none of the above
Why is the following markup invalid?
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```A(n) ____________________ is a network that connects computers and devices in an individual's workspace using wired and wireless technology.
Fill in the blank(s) with the appropriate word(s).
A VPN employs a method called "tunneling'' in which each packet from the sending computer is encapsulated within another packet before being sent over the Internet.
Answer the following statement true (T) or false (F)