An Advanced Quiz On Core Java!

Hello Hello world

World world world

Hello Hello Hello

World Hello Hello

Hello world Hello

The variable at line 4 should be declared as final

The variable at line 2 should be declared as final

The method at line 6 should be defined as final method

The inner class Circle 2 should be an abstract class

The object for the inner class Circle2 should be created in main() method

Transforms s1 into the union of s1 and s2

Transforms s1 into the intersection of s1 and s2.

Returns true if s2 is a subset of s1

Transforms s1 into the (asymmetric) set difference of s1 ands2

Copies elements from s2 to s1

A new synchronized object need to be created for every oneto-one personal messaging request from the user

The personal messaging feature cannot be added when thereis a general room facility

A part of the synchronized object that already exists for thegeneral room can be used

Just two more threads need to be created at the user end

To call the sleep() method, a thread must own the lock of theobject which the call is to be made.

To call the join() method, a thread must own the lock of theobject on which the call is to be made

To call the wait() method, a thread must own the lock of theobject on which the call is to be made.

To call the yield() method, a thread must own the lock of theobject on which the call is to be made.

To call the wait() method, a thread must own the lock of thecurrent thread.

Noise

Bark

Meow

Compilation fails

An exception is thrown at runtime

101020

1020

1010

Compilation Error

3014

Polymorphism

Abstraction

Inheritance

Reusability

None of the listed options

S

H

Space

Prints: A.m1, A.m2, A.m3, A.m4,

Compile-time error at 3.

Compile-time error at 4.

Compile-time error at 2.

Compile-time error at 1.

New HashSet(c);

All of the listed options

New LinkedTreeSet(c);

New LinkedHashSet(c);

NavigableSet

NavigableList

NavigableMap

Deque

Public

Final

Abstract

Private

Protected

Interface author{@String name(),String date()}

@interface author{@String name();@String date();}

Interface author{String name(),String date()}

Interface @author{String name(),String date()}

@interface author{String name();String date();}

Runtime Error "IllegalThreadStateException"

Compile-time Error

Prints the following output 2 times: Planet (waits for 1000 milli seconds) Earth

Prints the following output: Planet Planet (get into long wait. Never ends)

Prints the following output 1 time: Planet (waits for 1000 milli seconds) Earth

Polymorphism

Association

Inheritance

Aggregation

Persistence

Throws a compile time exception as overridden method a() does not throw exception smile

Welcome class two

Two

Throws a compile time exception as overridden method z() does not throw exception smile

Class two

One two

Two one

Compilation fails. Cannot use super keyword inside an anonymous class

Runtime exception. Cannot find the super class version of show() method

Welcome

Welcome Planet

Compilation fails

The code runs with no output

Welcome Planet 5

Four

One

None of the objects are eligible

Two

Three

FileInputStream and PipedInputStream

FileInputStream and InputStreamReader

InputStreamReader and FilterInputStream

FileInputStream and SearchInputStream

FileReader and BufferedReader

Created Program.txt

Created Program

Created Program.java

Created Program.java.txt

Reads the text from keyboard line by line and prints the same to the console on pressing ENTER key at the end of every line, then the same is flushed (erased) from the console.

Reads the text from keyboard line by line and prints the same to the console on pressing ENTER key at the end of every line

Reads the text from keyboard and prints the same to the console on pressing Ctrl Z, flushes (erases) the same from the console.

Reads the text from keyboard and prints the same to the console on pressing Ctrl Z

Reads the text from keyboard character by character and prints the same to the console on typing every character.

Compile-time error: Integer wrapper cannot accept char type

Prints: EQ

Compile-time error: Wrapper types cannot be compared using equals

Prints: equals EQ

Prints: equals

New elements are added and old ones are taken out but size is increasing

New elements are added and old ones are taken out but there will be a change in size

No change because we are adding and deleting the same element

New elements are added and old ones are taken out but no change in size

New elements can be added but cannot be removed

Compilation Error 'Cannot pass null as method arguments'

Prints: String

Throws NullPointerException at runtime

Prints: Object

ClassCastExceprion will be thrown.

@Override cannot be used for equals() method.

Compile error: class doesn't override a method from it's superclass @Override.

Program compiles sucessfully and executes.

The code is wrong. Exceptions should be caught in reversed hierarchy order.

Line 1 : throw new Exception(); Line 2 : throw new IOException(); Line 3 : throw new FileNotFoundException();

Line 1 : throw new IOException(); Line 2 : throw new FileNotFoundException(); Line 3 : throw new Exception();

Line 1 : throw new IOException(); Line 2 : throw new IOException(); Line 3 : throw new IOException();

Line 1 : throw new FileNotFoundException(); Line 2 : throw new IOException(); Line 3 : throw new Exception();

Queen king

King queen

Compilation fails.

MyThread king

MyThread queen

Go();

New Choco(). new Bar().go();

(new Bar() {}).go();

New Bar().go();

New Choco().go();

Compiles and Executes with no output

Welcome Planet

Planet Welcome

Planet

Compilation Error

Prints: -2.0

Prints: 10.3

Prints: 12.3

Prints: 0.0

DateFormat df = new SimpleDateFormat("dd/MM/yyyy"); try { Date d = df.parse(dob); } catch(ParseException pe) { }

GregorianCalendar g = new GregorianCalendar(dob); Date d = g.getDate();

Date d = new Date(dob);

CalendarFormat cf = new SimpleCalendarFormat("dd/MM/yyyy"); try { Date d = cf.parse(dob); } catch(ParseException pe) { }

Calendar c = new Calendar(dob); Date d = g.getDate();