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

Computer Science & Information Technology

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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

Computer Science & Information Technology

Why is the following markup invalid?

```

Here’s some text...


And some more text...

```

Computer Science & Information Technology

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).

Computer Science & Information Technology

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)

Computer Science & Information Technology