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Java - Test Questions on 'Capgemini' - 13 questions found


Which keyword is used to provide explicit access of a code block to single thread ?Core Java
Transient
Final
Explicit
Synchronized

  java  threads  multithreading

Which of the following statement is not true ?Core Java
x==y means they are pointing to the same object
x==y means that they hold same information
x.equals(y) means they are pointing to the same object
x.equals(y) means that they hold same information

  

When String literals are compared using ==, they always returns true if the string values are same because .. Core Java
of overridden compareTo method
of overridden compare method
of String Pool
== means that the object contents are equal

  

What will be the output of following ?

String str1 = new String("String1");
String str2 = new String("String1");
System.out.print(str1 == str2);
System.out.print(str1.equals(str2));
str1 = str2;
System.out.print(str1 == str2);
Core Java
falsetruetrue
truetruetrue
truetruefalse
falsetruefalse

  equals  object equality

What will be the output of following code ?

String str1 = "String1";
String str2 = "String1";
System.out.print(str1 == str2);
System.out.print(str1.equals(str2));
str1 = str2;
System.out.print(str1 == str2);
Core Java
falsetruetrue
falsefalsetrue
truetruetrue
falsefalsefalse

  equals  object equality  string pool

What will be the output of following code ?

String str1 = "String1";
String str2 = "String2";
str1.concat("String3");
System.out.print(str1);
System.out.print(str2);
Core Java
String1String2
String1String3String3
String1String3String1String3
String1String1

  

What will be the output of following code ?

String str1 = "String1";
String str2 = "String2";
str1=str1.concat("String3");
System.out.print(str1);
System.out.print(str2);
Core Java
String1String2
String1String3String2
String1String2String3
String1Stringg3String1

  

Collections is a / an ..Core Java
interface
abstract class
final class
util class

  collections

Which of the following about Garbage collection is false ?Core Java
We can call Garbage collection explicitly
Garbage Collection guarantees that the application will not run out of memory
finalize method is used by Java for Garbage Collection
Garbage Collection Mechanism delete unclaimed objects that are no longer required

  garbage collection

What kind of thread is Garbage collection thread ?Core Java
Daemon Thread
User Thread
System Thread
Active Thread

  garbage collection  thread type

Which of following is Daemon Thread ?Core Java
Thread Scheduler
Daemon Thread
Both of above
None of above

  daemon thread   threads

Which of following is not the method of object class ?Core Java
run
notify
wait
clone

  object class

Which of following memory segment is cleaned by Garbage Collection Mechanism ?Core Java
Stack
Heap
Code
Cache

  memory management  garbage collection







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