Follow Our FB Page << CircleMedia.in >> for Daily Laughter. We Post Funny, Viral, Comedy Videos, Memes, Vines...

Core Java Interview Questions
Questions Answers Views Company eMail

Is it possible to write JAVA program without including any of the packages,such as "import java.io.*"; bcoz I instantly wrote a code without "import..." statement and runned the program on command Line & it worked. the code is: class Person { String name; int age; Person(String s,int a) { name = s; age = a; } accept() { System.out.println(name+"Hi!!!!!"); System.out.println(age); } } class Demo { public static void main(Strings args[])throws IOException { String name = args[0]; int age = Integer.parseInt(args[1]); Person p = new Person(name,age); p.accept(); } }

3 3846

1) There are 10 different threads in runnable state. Each having priority 1 to 10. How does the CPU schedules or executes these threads?

RBS,

2 5563

2) Suppose there are 5 directories having lot of files (say txt files) in each directory. 2 things :- 2.1) You want to search for filenames which have a particular pattern. 2.2) Out of these filtered files you want to search for a particular keyword or a search string. How can you achieve this?

RBS, TCS,

1689

3) Suppose you are a very rich person, having 50 rooms and you have lost the key for one of the room's. How effectively you can find this key? (Qs2 and Qs3 are related)

RBS,

3 7382

Suppose there is a System A which gives some output. This output is used as input by system B. The rate at which System A produces is faster than the rate at which system B consumes it. How can you improve this?

RBS,

1 4857

Suppose there is an Online shopping cart application having different objects like Cart, SelectionItem, Billing, COnfiguration, Authentication, Authorization, PersonalDetails etc. Out of this which one can be made a singleton pattern and why?

RBS,

2 9373

What is Co-Variant return type in method overriding?

RBS,

1 4820

7) Suppose there is Student class like class student { int age; string name; } We want to store these objects in a HashMap. Do we need to override any methods in Student class? If any which ones and why? what if i just override equals or just hashcode? what will be the results in both the cases?

CSC, Nagarro, RBS,

4 7021

Can an abstract class have a constructor?

RBS, Wipro,

1 8565

What is the life cycle of Servlet?

3 4810

JVM responsibility?

TCS,

6 13511

explain Anonynous inner class?

TCS,

6 7201

why is S capital in System.out.println ????

6 17403

what is difference between length and length()?

8 14940

how your day start in your company

1 2811


Post New Core Java Questions

Un-Answered Questions { Core Java }

What does n mean in java?

373


Can array grow dynamically in java?

349


Can we nested try statements in java?

439


What is linked hashset and its features?

383


What is the requirement of thread in java?

446






What is the use of beaninfo?

417


Can inner class extend any class?

405


What is procedure writing?

359


Explain public static void main(string args[]).

412


What is connection class in java?

366


What are assembly attributes?

391


What is function and its uses?

399


what is the purpose of "virtual"?

421


Can you call a method on a null object?

405


What is finalize()? Is finalize() similar to a destructor?

398