Describe a common use of the built-in variable $$.
What will be an ideal response?
The built-in variable $$ contains the current process ID. In shell scripts, this is often used,
appended to a filename, to generate a temporary filename that should be unique.
Computer Science & Information Technology
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Discuss the differences between the candidate keys and the primary key of a relation. Explain what is meant by a foreign key. How do foreign keys of relations relate to candidate keys? Give examples to illustrate your answer.
What will be an ideal response?
Computer Science & Information Technology
A short prose version of a film is called a(n) ____.
A. take B. treatment C. summary D. variation
Computer Science & Information Technology