What is the precise definition of a primary key?
What will be an ideal response?
Column A (or a collection of columns) is the primary key for a table if:
Property 1: All columns in the table are functionally dependent on A.
Property 2: No subcollection of the columns in A (assuming A is a collection of columns and not just a single column) also has property 1.
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In JDK 1.5, analyze the following code.
``` Line 1: Integer[] intArray = {1, 2, 3}; Line 2: int i = intArray[0] + intArray[1]; Line 3: int j = i + intArray[2]; Line 4: double d = intArray[0]; ``` a. It is OK to assign 1, 2, 3 to an array of Integer objects in JDK 1.5. b. It is OK to automatically convert an Integer object to an int value in Line 2. c. It is OK to mix an int value with an Integer object in an expression in Line 3. d. Line 4 is OK. An int value from intArray[0] object is assigned to a double variable d.
Match the following ways to navigate in a document to key(s):
I. end of a file II. beginning of a line III. up one screen IV. beginning of the current paragraph V. beginning of next word A. Ctrl + End B. Home C. Ctrl + right arrow D. PgUp E. Ctrl + up arrow
Word checks your spelling and grammar as you type
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Scenario Manager is not an Excel Add-in
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