FontysVenlo - PRC1 - W03

Which usage of a Scanner for reading input is correct?

• Scanner input = new Scanner('System.in');

• Scanner input = new Scanner( nextLine());

• Scanner input = new Scanner("first line!\nsecond line!");

• Scanner input = new Scanner();

Which statement regarding the DEBUGGER is NOT correct?

• The debugger can be used to execute a program step-by-step

• Using the debugger, you can "Step INTO" methods.

• In using the debugger, you typically set BREAKPOINTS

• Experienced programmers don't need a debugger

What does the following operator mean? Operator: ||

• NOT EQUAL TO

• LOGICAL AND

• LOGICAL OR

• CONCATENATE

Which statement regarding an ARRAY is NOT correct?

• An array is a fixed size data structure

• The "size" is retrieved using <arrayName>.size()

• The first element in an array is on index 0

• An array can be processed using a for-each loop

Which statement regarding the ArrayList datatype is NOT correct?

• An element in an ArrayList can be accessed using the <name>[index] notation (e.g. namesList[4])

• An ArrayList is a dynamic wrapper around an array

• ArrayList objects are resized automatically when necessary

• ArrayLists can only contain a ReferenceType (e.g. ArrayList<String>)

Which statement is correct?

• The value 3 can't be stored in an ArrayList

• An Integer value can not be stored in an Array

• Integer is a wrapper type around the primitive int data type

• When you want to assign value 3 to a variable of type Integer, you have to do manual "boxing"

What will be printed out on the Console if you run the following code (see picture) ?

• true true false false

• false false true true

• true false true false

• false true false true

What does the following operator mean? Operator: &&

• LOGICAL OR

• MODULO

• POWER 2

• LOGICAL AND

What will be printed out on the Console if you run the following code (see picture) ?

• YOUNG

  Person

• YOUNG

  Person

• OLD

  Person

• OLD and YOUNG Person

What is a syntactically correct for-each loop, assuming 'names' is a String array?

• names.foreach{}

• for(int i = 0; i < names.length; i+=2){}

• for (name in names){}

• for (String name : names){}