Core Java Quiz 2 public class valan System

Core Java Quiz 2

public class valan { { System. out. print("A"); } public static void main(String args[]) { valan obj=new valan(); System. out. print("B"); } } AB

What will be the output public class valan { { System. out. print("A"); } public static void main(String args[]) { System. out. print("B"); valan obj=new valan(); valan obj 1=new valan(); } } BAA

What will be the output public class valan { static { System. out. print("A"); } public static void main(String args[]) { System. out. print("B"); } } AB

What will be the output public class valan { void valan() { System. out. print("A"); } public static void main(String args[]) { valan obj=new valan(); } Nothing will print }

What will be the output public class valan { static int k; static boolean count(){ k++; return true; } public static void main(String args[]) { int a=10, b=20; boolean b 1=a>b && count(); boolean b 2=a<b && count(); System. out. println(k); }} 1

What will be the output public class valan { public static void main(String[] args) { int a[]=new int[]{1, 2, 3}; System. out. println(a[1]); } } 2

public class valan { int a=10; void my. Method(int a){ a+=1; System. out. println(a+++a); } public static void main(String args[]){ new valan(). my. Method(2); } } 7

public class valan { public static void main(String args[]){ String c="ny"; c. concat("la"); System. out. print(c); c+="la"; System. out. print(c); } } nynyla

class Test. Return{ public static void main(string args[]) { int i=10; SOP(“Result : ”+ get. Square(i)); } public static int get. Square (int i) { return i*i; SOP(“END OF GET SQUARE”); } } a)100 b) runtime error c) END OF GET SQUARE , 100 d) 100 , END OF GET SQUARE Compile e) compile error Time Error

Which string method doesnot create a new string object a. concat() b. replace() c. to. String() d. sub. String() c

Class welcome{ Welcome(){} Welcome(String s){S. o. p(“hi how are you”); this(); } } Compile Time Error

public class valan { public static void main(String args[]){ int arr[]=new int[10]; int i=5; arr[i++]=i+++i++; System. out. print(arr[5]+": "+arr[6]); } } 13: 0

public class valan { void my. Method(int arr[]){ arr[0]=10; } public static void main(String args[]){ int[] small={1, 2, 3}; new valan(). my. Method(small); System. out. println(small[0]); } } 10

public class valan { int my. Method(String s){ return s. length(); } float my. Method(String s){ return (float)s. length(); } public static void main(String args[]){ new valan(). my. Method("Hai"); } } Compile Time Error

Which of the following is true about String. Buffer class? a) String. Buffer can be extended, since it is muttable b) String. Buffer is a mutable class c) string. Buffer is a sub class of String class d) String. Buffer is a wrapper class b

Which of the following statement is true regarding constructors? a) Abstract classes cannot have constructors b) can be overloaded across inherited classes c) Default constructors are optional only for the classes that does not have constructors d) Default constructors are optional for all classes C

public class valan{ static String s 1, s 2; public static void main(String args[]){ s 2=s 1+s 2; System. out. println(s 2); } } null

public class valan { public static void main(String args[]){ String x="Hai"; x. concat("Hello"); System. out. print(x); x=x. concat("Hello"); System. out. print(x); } } Hai. Hello

public class valan { public static void main(String args[]){ String s 1="java"; String s 2="java"; System. out. print(s 1==s 2); System. out. print(s 1. equals(s 2)); } } true

public class valan { public static void main(String args[]){ String s 1="java"; String s 2=new String("java"); System. out. print(s 1==s 2); System. out. print(s 1. equals(s 2)); } } falsetrue