Java Language Fundamentals Mcqs
Our collections of Multiple choice questions and answers focuses on study of Java Language Fundamentals. These questions are chosen from a collection of most authoritative and best reference books on Java. 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 Java Language Fundamentals topic comprehensively.
Java Programming Mcqs
Computer MCQS
Sciences MCQS
2. Which will legally declare, construct, and initialize an array?
3. Which is a reserved word in the Java programming language?
4. Which is a valid keyword in java?
5. Which three are valid declarations of a float? 1. float f1 = -343;
2. float f2 = 3.14;
3. float f3 = 0x12345;
4. float f4 = 42e7;
5. float f5 = 2001.0D;
6. float f6 = 2.81F;
1. float f1 = -343;
2. float f2 = 3.14;
3. float f3 = 0x12345;
4. float f4 = 42e7;
5. float f5 = 2001.0D;
6. float f6 = 2.81F;
6. What is the numerical range of a char?
7. Which three are legal array declarations? 1. int [] myScores [];
2. char [] myChars;
3. int [6] myScores;
4. Dog myDogs [];
5. Dog myDogs [7];
1. int [] myScores [];
2. char [] myChars;
3. int [6] myScores;
4. Dog myDogs [];
5. Dog myDogs [7];
8. Which three piece of codes are equivalent to line 3? 1. final int k = 4;
2. public int k = 4;
3. static int k = 4;
4. abstract int k = 4;
5. volatile int k = 4;
6. protected int k = 4;
public interface Foo
{
int k = 4; /* Line 3 */
}
1. final int k = 4;
2. public int k = 4;
3. static int k = 4;
4. abstract int k = 4;
5. volatile int k = 4;
6. protected int k = 4;
public interface Foo
{
int k = 4; /* Line 3 */
}
9. Which one of the following will declare an array and initialize it with five numbers?
10. Which is the valid declarations within an interface definition?
11. What will be the output of the program? Note: The command-line invocation > java CommandArgsThree 1 2 3
public class CommandArgsThree
{
public static void main(String [] args)
{
String [][] argCopy = new String[2][2];
int x;
argCopy[0] = args;
x = argCopy[0].length;
for (int y = 0; y < x; y++)
{
System.out.print(" " + argCopy[0][y]);
}
}
}
Note: The command-line invocation > java CommandArgsThree 1 2 3
public class CommandArgsThree
{
public static void main(String [] args)
{
String [][] argCopy = new String[2][2];
int x;
argCopy[0] = args;
x = argCopy[0].length;
for (int y = 0; y < x; y++)
{
System.out.print(" " + argCopy[0][y]);
}
}
}
12. What will be the output of the progra Note: The command-line invocation is > java CommandArgs 1 2 3 4
public class CommandArgs
{
public static void main(String [] args)
{
String s1 = args[1];
String s2 = args[2];
String s3 = args[3];
String s4 = args[4];
System.out.print(" args[2] = " + s2);
}
}
> java CommandArgs 1 2 3 4
public class CommandArgs
{
public static void main(String [] args)
{
String s1 = args[1];
String s2 = args[2];
String s3 = args[3];
String s4 = args[4];
System.out.print(" args[2] = " + s2);
}
}
13. What will be the output of the program, if this code is executed with the command line: > java F0091 world
public class F0091
{
public void main( String[] args )
{
System.out.println( "Hello" + args[0] );
}
}
> java F0091 world
public class F0091
{
public void main( String[] args )
{
System.out.println( "Hello" + args[0] );
}
}
14. What will be the output of the program?
public class TestDogs
{
public static void main(String [] args)
{
Dog [][] theDogs = new Dog[3][];
System.out.println(theDogs[2][0].toString());
}
}
class Dog { }
public class TestDogs
{
public static void main(String [] args)
{
Dog [][] theDogs = new Dog[3][];
System.out.println(theDogs[2][0].toString());
}
}
class Dog { }
15. What will be the output of the program ?
public class Test
{
public static void main(String [] args)
{
signed int x = 10;
for (int y=0; y<5; y++, x--)
System.out.print(x + ", ");
}
}
public class Test
{
public static void main(String [] args)
{
signed int x = 10;
for (int y=0; y<5; y++, x--)
System.out.print(x + ", ");
}
}
