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CSCI 1301 Exam 3 Questions And Correct Answers
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CSCI 1301 Exam 3 Questions And Correct AnswersWhat is an array - ANSWER data structure that represents a collection of the same types
of data
How to declare array variables? - ANSWER datatype[] arrayRefVar;
example:
double[] mylist
How to create an array? - ANSWER arrayVar = new datatype[arraySize];
example:
myList = new double[10]
How to declare and create an array in one step? - ANSWER datatype[] arrayRefVar =
new datatype[arraySize]
example:
double[] myList = new double[10]
once an array is created, can its size be changes? ANSWER nope, the size is fixed
How can you find the size or length of an array? ANSWER arrayRefVar.length
example:
, myList.length returns 10
indices go from 0 to what? ANSWER arrayRefVar.length - 1
so an array with length 10 goes from 0-9
when created, array elements are assigned the default values of: ANSWER - 0 for
numeric primitive data types
- '\u0000' for char types
- false for boolean types
array elements are accessed through the ____ - ANSWER index
what does it mean for the indices to be "0-based"? - ANSWER starts at 0 and goes up to
arrayRefVar.length - 1
in what syntax are each element in an array represented? - ANSWER indexed variable,
which is
arrayRefVar[index];
example:
myList[0] for the first
After an array is created can an indexed variable be used like regular variable? -
ANSWER yes
example:
myList[2] = myList[0] + myList[1];
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