Java Data Types, Variables and Arrays Mcqs
Our collections of Multiple choice questions and answers focuses on study of Java Data Types, Variables and Arrays . These questions are chosen from a collection of most authoritative and best reference books on Java Data Types, Variables and Arrays. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams and various tests and job interviews. One should practice our Mcqs to assimilate Data Types, Variables and Arrays comprehensively.
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33.
What will this code print?
int arr[] = new int [5];
System.out.print(arr);
int arr[] = new int [5];
System.out.print(arr);
34.
Which of these is an incorrect Statement?
35.
Which of these is necessary to specify at time of array initialization?
36.
What is the output of this program?
class array_output
{
public static void main(String args[])
{
int array_variable [] = new int[10];
for (int i = 0; i < 10; ++i)
{
array_variable[i] = i;
System.out.print(array_variable[i] + " ");
i++;
}
}
}
class array_output
{
public static void main(String args[])
{
int array_variable [] = new int[10];
for (int i = 0; i < 10; ++i)
{
array_variable[i] = i;
System.out.print(array_variable[i] + " ");
i++;
}
}
}
37.
What is the output of this program?
class multidimention_array
{
public static void main(String args[])
{
int arr[][] = new int[3][];
arr[0] = new int[1];
arr[1] = new int[2];
arr[2] = new int[3];
int sum = 0;
for (int i = 0; i < 3; ++i)
for (int j = 0; j < i + 1; ++j)
arr[i][j] = j + 1;
for (int i = 0; i < 3; ++i)
for (int j = 0; j < i + 1; ++j)
sum + = arr[i][j];
System.out.print(sum);
}
}
class multidimention_array
{
public static void main(String args[])
{
int arr[][] = new int[3][];
arr[0] = new int[1];
arr[1] = new int[2];
arr[2] = new int[3];
int sum = 0;
for (int i = 0; i < 3; ++i)
for (int j = 0; j < i + 1; ++j)
arr[i][j] = j + 1;
for (int i = 0; i < 3; ++i)
for (int j = 0; j < i + 1; ++j)
sum + = arr[i][j];
System.out.print(sum);
}
}
39.
What will this code print?
int arr[] = new int [5];
System.out.print(arr);
int arr[] = new int [5];
System.out.print(arr);
40.
What is the output of below snippet?
Object[] names = new String[3];
names[0] = new Integer(0);
Object[] names = new String[3];
names[0] = new Integer(0);