What should always be done before code that performs division?
What will be an ideal response?
Test that the divisor is not zero.
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If you do not need efficient random access but need to efficiently move sequentially through the list, then use the _____________ class.
(a) Vector
CryptoLocker is an example of what type of malware?
A. zero-day attack B. worm C. ransomware D. man-in-the-middle
Given the following relational schema and its functional dependencies:
 (a) Specify candidate keys and state the primary key. (b) Assuming that the relation is in first normal form (1NF), describe and illustrate the process of normalising the relational schema to second (2NF) and third (3NF) normal forms. Identify the primary and foreign keys in your third normal forms.
As you animate each part of a movie clip symbol, you can test the animation from the symbol's Timeline by pressing the ____ key.
a. ENTER b. F4 c. ESC d. ALT