Write a sed command that copies a file to standard output, replacing a sin- gle SPACE as the first character on a line with a 0 (zero) only if the SPACE is immediately followed by a number (0–9). For example:
$ sed '/^ [0-9]/ s/ /0/' filename
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Which of the following applications would a deque not be well suited for?
a. Applications that require frequent insertions and deletions at the front of a container. b. Applications that require frequent insertions and deletions in the middle of a container. c. Applications that require frequent insertions and deletions at the back of a container. d. Applications that require frequent insertions and deletions at the front and at the back of a container.
Which of the following is the seminal tool used to protect both our critical infrastructure and our individual liberties?
A) Information security B) Society C) Physical security D) Policy
Analyze the following code:
```
Double[] array = {1, 2, 3};
ArrayList
Which of the following options will refresh connections within an Excel workbook?
A) Click anywhere in the connected data B) Click Refresh in the Backstage area C) Click Refresh All on the Connections group D) Click Refresh in the Insert tab