Which of the following is not a primary expression?
A. x
B. 'A'
C. "Welcome"
D. 2 * 3
E. (x / y)
Answer: D
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In Java, when you open a text file you should account for a possible:
a. FileNotFoundException b. FileFullException c. FileNotReadyException d. all of the above
Which of the following is not true about how cloud computing can replace an FTP server?
A) Users can upload files and invite others to download them. B) Both Google and Microsoft enable online collaboration. C) A more advanced use is to not only share files, but to allow other users to make modifications. D) To allow users to make modifications, users need to be able to make the changes through their local machine without concern for what application software is being used on their web browser.
If you specified ____ for a column when you created a table, then changing a value in a column to null is prohibited.
A. NOT NULL B. NULL C. CHAR D. NUMBER
Values printed with the conversion specifiers e, E and f are output with __________ digits of precision to the right of the decimal point by default.
a) 0 b) 1 c) 5 d) 6