Java Basics

Which one is a Java valid variable name?

• Sum Grades

• static

• public

• FindAverage

Static methods refer to methds that:

• are private and no one can see them

• can be only accessed by an object of same class

• return data of type static

• can be written as ClassName.methodName(arguments)

we could pass a whole array to a method as a value

• True

• False

which statement is correct?

• int Var

• boolean 15;

• double var123;

• int min=0

int [] array2= array1;

• array2 references to array1 and points to array1's elements

• array2 will be created and has the same elements as array1

• nothing will happen

The output of the following code is:

int[] array = {2,4,6,8,10};

for (int i=0; i < array.length;i++){

System.out.println(array[2]);

}

• 2

  4

  6

  8

  10

• 2,4,6,8,10

• 6

  6

  6

  6

  6

• Nothing

method signature is

• method name + parameter list

• same as method head

• same as method body

• a cool signature :)

3 + 6 / 2 * 3 - 1 + 2 =

• 14.5

• 13

• 5

num= 2;

x=num++;

++num;

After performing the above statements, the values of x and num are

• x= 2

  num= 3

• x = 3

  num = 4

• x= 2

  num = 4

• x= 3

  num= 3

nextInt() is used to read user's numerical input

• True

• False