What does it mean for a hashing function to be “perfect”? Is this a desirable property, or should it be avoided?
What will be an ideal response?
A perfect hashing function is one in which each element in the collection is mapped to a unique location in
the hash table. There are no collisions. If it can be achieved, this is a very desirable property.
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The Object class contains the method:
(a) getClass() (b) toString() (c) equals() (d) all of the above
Answer the following statements true (T) or false (F)
1. All Collection classes are part of the java.util package.
2. Classes that implement the Set interface allows duplicate elements to occur.
3. The List interface is for collections that allow repetition of elements and do not impose an order on
their elements.
4. The difference between the List
Create a relational database that has a person table, a picture table, and a person–picture table. In the person table, store an id, the person name, and the person’s age. In the picture table, store a picture id and filename. In the person– picture table, keep track of the people in each picture. Write a function that let you find all the pictures for people over a certain age.
Note: Since this answer refers to a single relational database with multiple tables, it has to be completed with SQL.
________ is a set of prepackaged instructions which allow users to perform a variety of functions, including but not limited to word processing, statistical analysis, and the like
Fill in the blank(s) with the appropriate word(s).