What are the two main jobs of the data link layer?
What will be an ideal response?
The data link layer allows upper layers to access media. It also controls how data is placed on and
received from media.
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Select all that apply. Which of the following would be appropriate in a program that allows the user to enter either an uppercase or lowercase character in response to a prompt?
a. tolower b. ignorecase c. toupper d. ignoreupper e. ignorelower
You would use Query by Example, if _____.
A. you wish to use a visual approach to query building B. you build a query from an example C. you use a template for reports D. wish teach SQL with examples
For the following three items, find the problems in each of the following error messages produced by a source code compiler. Briefly state your reasoning and suggest a better message.
What will be an ideal response?
The compound multiplication operator is ____.
A. *= B. =* C. ** D. *+