Jim wants to rename a directory for a project that he has been working on. Which of the following commands can he use to perform that action?
A. mv projectx projecty
B. rename projectx projecty
C. ren projectx projecty
D. move projectx projecty
Answer: A
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Which of the following is true about encryption algorithms?
A. their strength is tied to their key length B. not vulnerable to brute force attacks C. block ciphers encrypt one bit at a time D. asymmetric algorithms use a single key
Consider a sorted binary tree data structure for storing integers. Write invariants in OCL denoting that
a. All nodes in the left subtree of any node contain integers that are less than or equal to the current node, or the subtree is empty. b. All nodes in the right subtree of any node contain integers that are greater than the current tree, or the subtree is empty. c. The tree is balanced.
Images can be used as ____ to cover the entire background of a Web page.
A. borders B. backdrops C. curtains D. wallpaper
What command creates a subdirectory under a directory?
A. rd B. md C. cd D. makedir