Java Assignment

  1. What are the valid ways to declare an integer array named a? (Check all that apply.)

int [ ] a;

int a [ ] ;

arrayint a;

int array a;

 

  1. An array a has 30 elements; what is the index of its last element?

29

30

31

  1. How do you retrieve the number of elements in an array a?

a.length( )

a.length

a.size( )

a.size

  1. Aggregate comparison of arrays is possible in Java.

true

false

  1. What is the output of this code sequence?
  2. What is the output of this code sequence?
  3. What is the output of this code sequence?
  4. Outline and discuss how to declare, instantiate and access array elements in shortest amount of code. Include your assessment on the pros and cons of this method. 

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