Java Array Quiz 1 | Java Array Question and Answers | JAVA Test
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Question 1 of 10
1. Question
Given the declaration : int [ ] ar = {1,2,3,4,5}; What is the value of ar[4]?
Correct
Incorrect
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Question 2 of 10
2. Question
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<myArray.length; j++ )
System.out.print( myArray[j] + ” ” ) ;
}
}Correct
Incorrect
-
Question 3 of 10
3. Question
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<myArray.length; j++ )
System.out.print( myArray[j] + ” ” ) ;
}
}Correct
Incorrect
-
Question 4 of 10
4. Question
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<myArray.length; j++ )
System.out.print( myArray[j] + ” ” ) ;
}
}Correct
Incorrect
-
Question 5 of 10
5. Question
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<myArray.length; j++ )
System.out.print( myArray[j] + ” ” ) ;
}
}Correct
Incorrect
-
Question 6 of 10
6. Question
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
Correct
Incorrect
-
Question 7 of 10
7. Question
An array holds:
Correct
Incorrect
-
Question 8 of 10
8. Question
What does the following method do?
void blur ( char[] z, String st )
{
if ( z.length < st.length() ) return; for ( int j=0; j < st.length; j++ ) z[j] = st.charAt( j ); }Correct
Incorrect
-
Question 9 of 10
9. Question
What type parameter must the following method be called with?
int myMethod ( double[] ar )
{
. . . .
}Correct
Incorrect
-
Question 10 of 10
10. Question
The last value in an array called ar can be found at index:
Correct
Incorrect