What does a primary key do?
a. Identifies each row of a table.
b. Selects a number of rows from a database.
c. Stores a bunch of related data.
d. None of the above.
a. Identifies each row of a table.
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Assume int[] scores = {1, 20, 30, 40, 50}, what value does java.util.Arrays.binarySearch(scores, 3) return?
a. 0 b. -1 c. 1 d. 2 e. -2
Define the roles played by literal characters and metacharacters in regular expressions.
What will be an ideal response?
A file saved as a .potx file is a:
A) PowerPoint handout. B) PowerPoint template. C) slide show. D) slide master.
Case 7-2Jinling is testing a program that uses if statements for her company.Jinling is testing a loop that has errors. She should check the value of the control variable loop at all of the following points EXCEPT ____.
A. before the loop is entered B. in the middle of each iteration C. after each update D. after the loop is exited