Quiz - Programming With Java - Language Fundamentals

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[All Quizzes] → [Programming With Java] → [Language Fundamentals]

1. ► Which statement(s) are true about following program?

class MyException extends Exception {
    MyException() {
    } MyException(String s) {
        super(s);
    }
}

public class FunDo {
    static void throwException() throws MyException {
        throw new MyException();
    } public static void main(String[]args) {
        try {
            throwException();
        } catch(RuntimeException r) {
            System.out.println("RuntimeException:" + r);
        } catch(MyException exp) {
            System.out.println("MyException");
        }
    }
}

A. Class MyException have a empty constructor.
B. Main class in given program is Fundo.
C. Class Fundo is subclass in given program.
D. Class MyException is super class of class Fundo.
E. Option 1 & 2

2. ► What would be output of following program?

public class FunOp {
    public static void main(String[]args) {
        int x = 3, y = 5;
        int a = x + y - x / y + 2;
        int b = (x + y) - x / (y + 2);
         System.out.println(a + b);
}}

A. 10 8
B. 18
C. 9
D. 108
E. none

3. ► Which of following is not of integer types?

A. long
B. FALSE
C. double
D. float
E. byte

4. ► Select the true statement about given code ?

class Solution {
    public static void main(String[]args) {
        for (int i = 0; i < args.length; i++)
            System.out.print(i == 0 ? args[i] : " " + args[i]);
        System.out.println();
}}

A. To compile type command " javac Solution.java"
B. To run this programme type command "java Solution"
C. If you type following command "java Solution test java" out put will be "test java"
D. This compilation unite will be saved in file as Solution.java
E. All

5. ► What would be output of following program?

public class SolArray {
    public static void main(String[]args) {
        int array1[] = { 1, 2 };

        int array2[] = array1;

        System.out.println(array1[0] == array2[0]
                           && array1[1] == array2[1]);
    }
}

A. FALSE
B. Some runtime exception.
C. TRUE
D. Program fails to compile.
E. None

6. ► What command should be used to execute main method of class Solution?

A. Javac Solution
B. java Solution.main
C. java Solution
D. java Solution.class
E. java Solution.java

7. ► Which statement is true about integer?

A. A integer can be represented in decimal (base 10 ) format.
B. A integer can be represented in hexadecimal (base 16) format.
C. A integer can be represented in octal (base 8) format.
D. A integer can have negative value.
E. All

8. ► What would be output of following program?

public class FunOp {
    public static void main(String[]args) {
        int x = 3, y = 5;
        int a = x + y - x / y + 2;
        int b = (x + y) - x / (y + 2);
         System.out.println("a=" + a + " " + "b=" + b);
}}

A. a=8 b=8
B. a=8 b=9
C. a=9 b=8
D. a=10 b=9
E. a=10 b=8

9. ► What command is the used to compile java class Solution.java?

A. java
B. javaa Solution.java
C. javac Solution.main
D. javac Solution.java
E. javac Solution

10. ► What would be output of following program?

public class SolArray {
    public static void main(String[]args) {
        int array[][] = { {1, 2}, null };

      for (int[]arr:array)
          for (int x:arr)
                System.out.println(x);
    }
}

A. Program fails to compile.
B. Program prints 12.
C. Program fails with Exception.
D. Option 2 & 3
E. All

11. ► What will be hex value of integer value 2013?

A. 8D
B. 7C
C. 7D
D. 7DD
E. None

12. ► Selects correct declaration of array variable?

A. short [][] arr
B. Object [] objArr
C. byte[] rowvector, colvector, matrix[];
D. byte rowvector[], colvector[], matrix[][];
E. All

13. ► Choose correct option about Arrays in java?

A. Arrays are objects.
B. Arrays are dynamically created.
C. An array containing n elements, all elements should be of same type.
D. An array element can be an array type.
E. All

14. ► Which statement is/are true about object?

A. An object is an instance of a class.
B. Objects can be manipulated.
C. An object can be created using key word 'new' followed by constructor of class.
D. An object have life cycle.
E. All

15. ► Which of following can be represented as literal in java?

A. Integer
B. Float
C. String
D. Null
E. All

16. ► Which of following is/are java reserve keywords?

A. new
B. java
C. goto
D. class
E. All

17. ► Which statements are true about following code?

Class A {
    int x;
} class B extends A {
    int y;
}

A. Class B extends Class A.
B. Class A is super class of Class B
C. Objects of class B will have a field named x;
D. Class B is subclass of Class A.
E. All

18. ► What would be output of following program

public class SolArray {
    public static void main(String[]args) {
        int array1[] = { 1, 2 };

        int array2[] = array1;

        System.out.print((array1 == array2) + " ");
        array1[1]++;
        System.out.println(array2[1]);
    }
}

A. false 2
B. false 10
C. false 1
D. true 3
E. true 2

19. ► What would be output of following program?

class Solution {
    public static void main(String[]args) {
        int[] array = new int[101];
        for (int i = 0; i < array.length; i++)
             array[i] = i;
        int sum = 0;
        for (int x:array)
             sum += x;
         System.out.println(sum);
}}

A. It fails to compile.
B. 50
C. 500
D. 5010
E. 5050

20. ► Select option(s) which represent output of following program.

public class SolArray {
    public static void main(String[]args) {
        int array1[] = { 1, 2 };

        int array2[] = array1;

        System.out.println(array1.getClass());
        System.out.println(array1.getClass().getSuperclass());

    }
}

A. class [I class java.lang.Object
B. class array
C. class array[]
D. class java.lang.Object
E. All