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EECS 132 Final Exam New Generation 2023 Questions and Answers
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EECS 132 Final Exam New Generation 2023 Questions and Answers
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EECS 132 Final Exam New Generation1. What is a data type?: answer- What kind of data that a value represents
- It is either specified by the programmer or by the rules of the
programming language
- every piece of data has an unambiguous type
- there are two kinds of types in Java: primitive and non-primitive
2. What is a typecast? How is it different for when typecasting objects?What
things are similar?: answer- - Typecasting a primitive type converts a
value of one type into a value of a different type
- Typecasting a non-primitive type changes how you can use that
variable, but it does not change the location in memory
- Typecasting a non-primitive type means that the methods and fields
you can access change depending on what you have typecasted to
- The way in which you typecast is the same
- For compound types, automatic typecasting occurs when you go from
a lower to a higher place in the hierarchy; for primitive types, it is
,automatic when you go from a narrower type to a wider type
3. You can typecast (convert) between all primitive types except .: boolea
4. T/F: You cannot typecast between primitive and compound types: T
5. How do you typecast?: - you place the desired type in parentheses and
imme- diately to the left of the value(desired-type)value
6. When are typecasts done automatically?: Values are automatically
converted from narrower to wider types
7. When must a typecast be explicit?: When you are converting from a
"wider" type to a "narrower" type
8. List the primitive types in Java from widest to narrowest: 1. double
2. float
3. long
4. int
5. short/char
6. byte
9. Generally, when converting to a wider type, Java converts the value to as
as possible to the original value.When converting to a narrower
type, Java generally the value.: - close
- truncates
,10.What is a primitive type? How many primitive types are there in Java?:
- types already predefined in Java
-8
1. int
2. double
, 3. float
4. long
5. short
6. boolean
7. char
8. byte
11.What is a non-primitive/compound type in Java?: A type that is both
pre-de- fined and programmer defined; It can be made of primitive
types and other com- pound types
12.What are the differences between primitive and compound types?: -
prim- itive types:
1. the value of the type is the binary representation of the value
2.There are specifically 8 of them and they are pre-defined in Java
- compound:
1. the value of the type is the location of the instance in memory
2.There are an endless amount and can be either pre-defined or
programmer-de- fined
3.A basic compound type is called a class, which consists of variables of
any type, methods that take 0 or more inputs + possibly perform some
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