Java Array Quiz 1 | Java Array Question and Answers | JAVA Test

Given the declaration : int [ ] ar = {1,2,3,4,5}; What is the value of ar[4]?

What is the output of the following?
class ChangeIt
{
static void doIt( int[] z )
{
int temp = z[ z.length-1 ] ;
z[0] = temp;
}
}

class TestIt
{
public static void main ( String[] args )
{
int myArray = {1, 2, 3, 4, 5} ;

ChangeIt.doIt( myArray );

for (int j=0; j System.out.print( myArray[j] + ” ” ) ;
}
}

What is the output of the following?
class LowHighSwap
{
static void doIt( int[] z )
{
int temp = z[ z.length-1 ] ;
z[ z.length-1 ] = z[0] ;
z[0] = temp;
}
}

class TestIt
{
public static void main ( String[] args )
{
int[] myArray = {1, 2, 3, 4, 5} ;

LowHighSwap.doIt( myArray );

for (int j=0; j System.out.print( myArray[j] + ” ” ) ;
}
}

What is the output of the following?
class ChangeIt
{
static void doIt( int[] z )
{
int[] A = z ;
A[0] = 99;
}
}

class TestIt
{
public static void main ( String[] args )
{
int myArray = {1, 2, 3, 4, 5} ;

ChangeIt.doIt( myArray );

for (int j=0; j System.out.print( myArray[j] + ” ” ) ;
}
}

What is the output of the following?
class ChangeIt
{
static void doIt( int[] z )
{
int temp = z[ z.length-1 ] ;
z[0] = temp;
}
}

class TestIt
{
public static void main ( String[] args )
{
int myArray = {1, 2, 3, 4, 5} ;

ChangeIt.doIt( myArray );

for (int j=0; j System.out.print( myArray[j] + ” ” ) ;
}
}

What is the output of the following?
class ChangeIt
{
static void doIt( int[] z )
{
z = null ;
}
}

class TestIt
{
public static void main ( String[] args )
{
int[] myArray = {1, 2, 3, 4, 5} ;

ChangeIt.doIt( myArray );

for (int j=0; j

• 1 2 3 4 5
• Nothing will be printed.
• The program will halt with a run time error.
• 0 0 0 0 0

An array holds:

What does the following method do?
void blur ( char[] z, String st )
{
if ( z.length

What type parameter must the following method be called with?
int myMethod ( double[] ar )
{
. . . .
}

The last value in an array called ar can be found at index: