Explore topic-wise MCQs in General Awareness.

 import java.awt.*; import java.applet.*; public class myapplet extends Applet { public void paint(Graphics g) { g.drawString("A Simple Applet", 20, 20); } } 

 class output { public static void main(String args[]) { StringBuffer s1 = new StringBuffer("Hello"); s1.setCharAt(1,x); System.out.println(s1); } } 

 class Input_Output { public static void main(String args[]) throws IOException { char c; BufferedReader obj = new BufferedReader(new InputStreamReader(System.in)); do { c = (char) obj.read(); System.out.print(c); } while(c != ' ''); } } 

 import java.io.*; class Chararrayinput { public static void main(String[] args) { String obj = "abcdef"; int length = obj.length(); char c[] = new char[length]; obj.getChars(0, length, c, 0); CharArrayReader input1 = new CharArrayReader(c); CharArrayReader input2 = new CharArrayReader(c, 0, 3); int i; try { while((i = input2.read()) != -1) { System.out.print((char)i); } } catch (IOException e) { e.printStackTrace(); } } } 

 class output { public static void main(String args[]) { char c[]={'a','1','b',' ','A','0']; for (int i = 0; i < 5; ++i) { if(Character.isDigit(c[i])) System.out.println(c[i]" is a digit"); if(Character.isWhitespace(c[i])) System.out.println(c[i]" is a Whitespace character"); if(Character.isUpperCase(c[i])) System.out.println(c[i]" is an Upper case Letter"); if(Character.isUpperCase(c[i])) System.out.println(c[i]" is a lower case Letter"); i = i + 3; } } } 

 class output { public static void main(String args[]) { String a="hello i love java"; System.out.println(indexof('i')+" "+indexof('o')+" "+lastIndexof('i')+" "+lastIndexof('o') )); } } 

 class output { public static void main(String args[]) { StringBuffer s1 = new StringBuffer("Hello"); StringBuffer s2 = s1.reverse(); System.out.println(s2); } } 

 class A { public int i; private int j; } class B extends A { void display() { super.j = super.i + 1; System.out.println(super.i + " " + super.j); } } class inheritance { public static void main(String args[]) { B obj = new B(); obj.i=1; obj.j=2; obj.display(); } } 

 final class A { int i; } class B extends A { int j; System.out.println(j + " " + i); } class inheritance { public static void main(String args[]) { B obj = new B(); obj.display(); } } 

 class Alligator { public static void main(String[] args) { int []x[] = {{1,2}, {3,4,5}, {6,7,8,9}}; int [][]y = x; System.out.println(y[2][1]); } } 

 class A { int i; void display() { System.out.println(i); } } class B extends A { int j; void display() { System.out.println(j); } } class method_overriding { public static void main(String args[]) { B obj = new B(); obj.i=1; obj.j=2; obj.display(); } } 

 class Abc { public static void main(String[]args) { String[] elements = { "for", "tea", "too" }; String first = (elements.length > 0) ? elements[0]: null; } } 

 class A { int i; public void display() { System.out.println(i); } } class B extends A { int j; public void display() { System.out.println(j); } } class Dynamic_dispatch { public static void main(String args[]) { B obj2 = new B(); obj2.i = 1; obj2.j = 2; A r; r = obj2; r.display(); } } 

 class Output { public static void main(String args[]) { Object obj = new Object(); System.out.print(obj.getclass()); } } 

 class A { int i; int j; A() { i = 1; j = 2; } } class Output { public static void main(String args[]) { A obj1 = new A(); System.out.print(obj1.toString()); } } 

 A. public class Circle implements Shape { private int radius; } B. public abstract class Circle extends Shape { private int radius; } C. public class Circle extends Shape { private int radius; public void draw(); } D. public abstract class Circle implements Shape { private int radius; public void draw(); } E. public class Circle extends Shape { private int radius; public void draw() { /* code here */ } } F. public abstract class Circle implements Shape { private int radius; public void draw() { /* code here */ } } 

 class A { public int i; protected int j; } class B extends A { int j; void display() { super.j = 3; System.out.println(i + " " + j); } } class Output { public static void main(String args[]) { B obj = new B(); obj.i=1; obj.j=2; obj.display(); } } 

 class A { int i; void display() { System.out.println(i); } } class B extends A { int j; void display() { System.out.println(j); } } class inheritance_demo { public static void main(String args[]) { B obj = new B(); obj.i=1; obj.j=2; obj.display(); } } 

 class A { int i; } class B extends A { int j; void display() { super.i = j + 1; System.out.println(j + " " + i); } } class inheritance { public static void main(String args[]) { B obj = new B(); obj.i=1; obj.j=2; obj.display(); } } 

 class A { public int i; public int j; A() { i = 1; j = 2; } } class B extends A { int a; B() { super(); } } class super_use { public static void main(String args[]) { B obj = new B(); System.out.println(obj.i + " " + obj.j) } } 

 class box { int width; int height; int length; int volume; void volume(int height, int length, int width) { volume = width*height*length; } } class Prameterized_method { public static void main(String args[]) { box obj = new box(); obj.height = 1; obj.length = 5; obj.width = 5; obj.volume(3,2,1); System.out.println(obj.volume); } } 

 class equality { int x; int y; boolean isequal() { return(x == y); } } class Output { public static void main(String args[]) { equality obj = new equality(); obj.x = 5; obj.y = 5; System.out.println(obj.isequal()); } } 

 class Compscibits { public void m1 (int i,float f) { System.out.println(" int float method"); } public void m1(float f,int i); { System.out.println("float int method"); } public static void main(String[]args) { Compscibits c=new Compscibits(); c.m1(20,20); } } 

 class overload { int x; int y; void add(int a) { x = a + 1; } void add(int a, int b) { x = a + 2; } } class Overload_methods { public static void main(String args[]) { overload obj = new overload(); int a = 0; obj.add(6); System.out.println(obj.x); } } 

 class overload { int x; int y; void add(int a) { x = a + 1; } void add(int a , int b) { x = a + 2; } } class Overload_methods { public static void main(String args[]) { overload obj = new overload(); int a = 0; obj.add(6, 7); System.out.println(obj.x); } } 

 class access { public int x; private int y; void cal(int a, int b) { x = a + 1; y = b; } } class access_specifier { public static void main(String args[]) { access obj = new access(); obj.cal(2, 3); System.out.println(obj.x + " " + obj.y); } } 

 class access { public int x; private int y; void cal(int a, int b) { x = a + 1; y = b; } void print() { system.out.println(" " + y); } } class access_specifier { public static void main(String args[]) { access obj = new access(); obj.cal(2, 3); System.out.println(obj.x); obj.print(); } } 

 class box { int width; int height; int length; int volume; box() { width = 5; height = 5; length = 6; } void volume() { volume = width*height*length; } } class constructor_output { public static void main(String args[]) { box obj = new box(); obj.volume(); System.out.println(obj.volume); } } 

 class Compsci { Compsci()throws IOException { } } class Bits extends Compsci { Bits() { } public static void main(String[]args) { } } 

 package pkg; class display { int x; void show() { if (x > 1) System.out.print(x + " "); } } class packages { public static void main(String args[]) { display[] arr=new display[3]; for(int i=0;i<3;i++) arr[i]=new display(); arr[0].x = 0; arr[1].x = 1; arr[2].x = 2; for (int i = 0; i < 3; ++i) arr[i].show(); } } 

 package pkg; class output { public static void main(String args[]) { StringBuffer s1 = new StringBuffer("Hello"); s1.setCharAt(1, x); System.out.println(s1); } } 

 package pkg; class output { public static void main(String args[]) { StringBuffer s1 = new StringBuffer("Hello World"); s1.insert(6 , "Good "); System.out.println(s1); } } 

 interface calculate { void cal(int item); } class displayA implements calculate { int x; public void cal(int item) { x = item * item; } } class displayB implements calculate { int x; public void cal(int item) { x = item / item; } } class interfaces { public static void main(String args[]) { displayA arr1 = new displayA; displayB arr2 = new displayB; arr1.x = 0; arr2.x = 0; arr1.cal(2); arr2.cal(2); System.out.print(arr1.x + " " + arr2.x); } } 

 interface calculate { void cal(int item); } class display implements calculate { int x; public void cal(int item) { x = item * item; } } class interfaces { public static void main(String args[]) { display arr = new display; arr.x = 0; arr.cal(2); System.out.print(arr.x); } } 

 public class Bits { public static void main(String[] args) { try { return; } finally { System.out.println( "Finally" ); } } } 

 class exception_handling { public static void main(String args[]) { try { int a = args.length; int b = 10 / a; System.out.print(a); } catch (ArithmeticException e) { System.out.println("1"); } } } 

 class exception_handling { public static void main(String args[]) { try { throw new NullPointerException ("Hello"); } catch(ArithmeticException e) { System.out.print("B"); } } } 

 public class San { public static void main(String args[]) { try { System.out.print("Hello world "); } finally { System.out.println("Finally executing "); } } } 

 class exception_handling { public static void main(String args[]) { try { int a, b; b = 0; a = 5 / b; System.out.print("A"); } catch(ArithmeticException e) { System.out.print("B"); } finally { System.out.print("C"); } } } 

 class exception_handling { public static void main(String args[]) { try { int i, sum; sum = 10; for (i = -1; i < 3 ;++i) sum = (sum / i); } catch(ArithmeticException e) { System.out.print("0"); } System.out.print(sum); } } 

 class exception_handling { public static void main(String args[]) { try { int a = 1; int b = 10 / a; try { if (a == 1) a = a / a - a; if (a == 2) { int c[] = {1}; c[8] = 9; } } finally { System.out.print("A"); } } catch (Exception e) { System.out.println("B"); } } } 

 class exception_handling { public static void main(String args[]) { try { int a = args.length; int b = 10 / a; System.out.print(a); try { if (a == 1) a = a / a - a; if (a == 2) { int []c = {1}; c[8] = 9; } } catch (ArrayIndexOutOfBoundException e) { System.out.println("TypeA"); } catch (ArithmeticException e) { System.out.println("TypeB"); } } } 

 class Output { public static void main(String args[]) { try { int a = 0; int b = 5; int c = b / a; System.out.print("Hello"); } } } 

 class Output { public static void main(String args[]) { try { int a = 0; int b = 5; int c = a / b; System.out.print("Hello"); } finally { System.out.print("World"); } } } 

 class Output { public static void main(String args[]) { try { int a = 0; int b = 5; int c = b / a; System.out.print("Hello"); } catch(Exception e) { System.out.print("World"); } finally { System.out.print("World"); } } } 

 class exception_handling { public static void main(String args[]) { try { throw new NullPointerException ("Hello"); System.out.print("A"); } catch(ArithmeticException e) { System.out.print("B"); } } } 

 class Myexception extends Exception { int detail; Myexception(int a) { detail = a; } public String toString() { return "detail"; } } class Output { static void compute (int a) throws Myexception { throw new Myexception(a); } public static void main(String args[]) { try { compute(3); } catch(Exception e) { System.out.print("Exception"); } } } 

 class exception_handling { public static void main(String args[]) { try { int a = args.length; int b = 10 / a; System.out.print(a); try { if (a == 1) a = a / a - a; if (a == 2) { int c = {1}; c[8] = 9; } } catch (ArrayIndexOutOfBoundException e) { System.out.println("TypeA"); } catch (ArithmeticException e) { System.out.println("TypeB"); } } } } 

 public class Test { public static void aMethod() throws Exception { try /* Line 5 */ { throw new Exception(); /* Line 7 */ } finally /* Line 9 */ { System.out.print("finally "); /* Line 11 */ } } public static void main(String args[]) { try { aMethod(); } catch (Exception e) /* Line 20 */ { System.out.print("exception "); } System.out.print("finished"); /* Line 24 */ } } 

 class Exc0 extends Exception { } class Exc1 extends Exc0 { } /* Line 2 */ public class Test { public static void main(String args[]) { try { throw new Exc1(); /* Line 9 */ } catch (Exc0 e0) /* Line 11 */ { System.out.println("Ex0 caught"); } catch (Exception e) { System.out.println("exception caught"); } } }