cs singh

Hi Ranchers,
Cleared SCJP 1.4 on saturday with 88%,my experience was good,i was little bit nervous in the beginning, but once you start doing ques.it would be Ok.
Just keep the key concepts in mind, sometimes it happens that in trying to solve the tougher questions, u forget the basics!!
Solving mocks is important because during the first reading of the book(K&B) , u'll THINK that some lines or paragraphs are not important, BUT once u solve the 2-3 mocks and are on second reading of the book, u'll find that how did i miss these lines.
In short, stick to the objectives of exam ,study K&B atleast two times , and solve as many mocks as u can.I did not purchase any kind of commercial exam.
Already many people have given the list of mocks on this site, so just go through that, even i did the same...
On the day of exam>>>
1. Be patient and cool.
2. Read each question carefully.
3. Mark question if u have doubt in that.
4. Once u are done, go agn to the marked questions.
5. Revise all of the questions before submitting.
6. U'll definitely come out with a good score.

Hope this will help u..
Regards,
Chani.
(SCJP 1.4-88%)

public class Test { public static void main(String [] args ) { assert args[0] == "alphabeta" : args[0]; System.out.println("done "); } }
what will be the o/p if given :
java Test Hello

Answer says, it will print Hello followed by the assertion error, but we cannot assert on command line arguments then why is it so??

Thanks a lot Keith for your valuable time...
got it now.

class XTC { public static void main ( String [ ] ka ) { Integer b = null ; System . out . println ( b instanceof Object ) ; } }; Options : a . true b . false c . Compiler error d . Some exception thrown at runtime

o/p is false here.. i'm not getting why???

class Q009 { public static void main ( String args [ ] ) { System . out . println ( ( Math . abs ( Integer . MIN _ VALUE ) ) ); } }; Options : a . 2147483648 b . The code fails to compile c . -2147483648 d . NegativeArraySizeException thrown at runtime
why the ans is c here.?

Hi Henry, can u please explain it in detail, i did not get the explaination.., i think choice sd be A.

public class Foo { public static void main (String []args) { int i = 1; int j = i++; if ((i>++j) && (i++ ==j)) { i +=j; } System.out.println(" " +i+j); } }
Control will not go into if loop as the result is false then from where i is getting 2??

what should be output then???

public class Test{ public static int y; public static int foo ( int x){ System.out.print("foo"); return y=x; } public static int bar(int z){ System.out.print("bar"); return y=z; } public static void main(String args[]){ int t=2; assert t<4:bar(7);// 1 assert t>1:foo(8); System.out.println("done"); } }

output is done, but if i change //1 as assert t>4,then bar should be printed out, but its not, its still giving the answer "done". can somebody pls explain??

class A{ static int i; A(){ ++i; } int get(){ return ++i; } }; class B extends A{ private B(){ i++; } int get(){ return ( i + 3); } }; class Q028 extends B{ public static void main(String ka[]){ Q028 obj = new Q028(); A ob = new A(); ob = (A)obj; System.out.println(ob.get()); } }; Options : a . 2 b . Compile error " No method matching get ( ) found in class Q026 . " c . 5 d . NullPointerException thrown at run-time .
whats making this code to give the answer as 5???

class Just { int a = 10 ; Just ( ) { call ( ) ; } void call ( ) { System . out . print( "a = " + a + " ") ; } }; class Q05 extends Just { int b = 16 ; Q05 ( ) { call ( ) ; } void call ( ) { System.out.print( " b = " + b + " " ) ; } public static void main ( String args [ ] ) { new Q05 ( ) ; } } Options : a . Prints a = 10 b = 16 b . Prints b = 0 b = 16 c . Prints a = 0 a = 10 d . Prints b = 0 a = 0 e . Stop fooling me ! The code doesn't compile because a & b both are referenced before the instance is created .
According to me ans sd be a, but its b. Can anybody pls. explain how the control is flowing in the above code.??

Consider the following code . what is the result of compiling & executing C.java ? class A { } class B extends A { } class C extends B { static void doSomething ( A x , A y ) {System.out.print("AA");} static void doSomething ( A x , B y ) {System.out.print("AB");} static void doSomething ( B x , A y ) {System.out.print("BA");} static void doSomething ( B x , B y ) {System.out.print("BB");} static void doSomething ( C x , C y ) { System.out.println("CC");} public static void main(String[] args) { doSomething(null,null); } } Options : a . Prints AA to the console b . Prints AB to the console c . Prints BA to the console d . Prints BB to the console e . Prints CC to the console
why is the answer e??

//in file A.java package p1; public class A { protected int i = 10; public int getI() { return i; } } //in file B.java package p2; import p1.*; public class B extends p1.A { public void process(A a) { a.i = a.i*2; } public static void main(String[] args) { A a = new B(); B b = new B(); b.process(a); System.out.println( a.getI() ); } }

Answer is: Compile time error.
I'm not getting the reason for it

public class Test9{ public static void main(String a[]){ final byte b = 1; char c = 2; short s = 3; int i = 4; c = b; // 1 s = b; // 2 i = b; //3 s = c * b; //4 } } Which of the following are correct? A1 Error at mark 1 A2 Error at mark 2 A3 Error at mark 3 A4 Error at mark 4 the error is online 4, but if i remove final modifier from byte , it gives error on line 1 too!! why is it so??

thanks both of you !!