Interview Questions and Answers for 'Java' | Search Interview Question - javasearch.buggybread.com
Javasearch.buggybread.com

Search Interview Questions


 More than 3000 questions in repository.
 There are more than 900 unanswered questions.
Click here and help us by providing the answer.
 Have a video suggestion.
Click Correct / Improve and please let us know.
Label / Company      Label / Company / Text

   



Interview Questions and Answers - Order By Rating

   next 30
 Q1591. What is the size of double type ?

a. 16 bit
b. 32 bit
c. 64 bit
d. 128 bit
Ans. 64 bit

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   data types


 Q1592. What is the size of short type ?

a. 8 bit
b. 16 bit
c. 32 bit
d. 128 bit
Ans. 16 bit

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   data types


 Q1593. Which keyword is used to provide explicit access of a code block to single thread ?

a. Transient
b. Final
c. Explicit
d. Synchronized
Core Java
Ans. Synchronized

  Sample Code for Synchronized

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   threads   multithreading     Asked in 2 Companies      basic


 Q1594. Which of the following exception is thrown when we try to access element which is beyond the size ?

a. NullPointerException
b. ArrayIndexOutOfBoundException
c. ArithmeticException
d. ParseException
Ans. ArrayIndexOutOfBoundException

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   exceptions   error handling


 Q1595. Checked exception needs to be ...

a. Caught
b. Method needs to declare that it throws these exception
c. Either A or B
d. Both A and B
Ans. Either A or B

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   exceptions   checked exceptions


 Q1596. Collections.sort can only be performed on ..

a. Set
b. List
c. Map
d. Any Collection implementation
Core Java
Ans. List

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     collections   java   sorting

Try 2 Question(s) Test


 Q1597. Effective Java 6 , TreeMap implements ...

a. Map Interface
b. SortedMap Interface
c. NavigableMap Interface
d. SortedNavigableMap Interface
Ans. SortedMap Interface

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   collections   map


 Q1598. Which of the following is not possible ?

a. try block followed by catch
b. try block followed by finally
c. try block followed by catch block and then finally
d. try block without catch or finally block
Ans. try block without catch or finally block

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     exceptions   java   try-catch   finally

Try 1 Question(s) Test


 Q1599. Which of the following is not the difference between Singleton and Static class ( Class with static members only ) ?

a. Only one object can be created for Singleton class whereas No objects are created for static class.
b. Singleton class instance is initiated using new keyword whereas static class instance is created using static method.
c. Singleton class can be serialized whereas Static class cannot be.
d. Singleton Class can participate in runtime Polymorphism whereas Static class cannot.
Ans. Singleton class instance is initiated using new keyword whereas static class instance is created using static method.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   oops   singleton   design pattern   static class


 Q1600. Which of the following is false about main method ?

a. It should be declared public and static
b. it should have only 1 argument of type String array
c. We can override main method
d. We can overload main method
Core Java
Ans. We can override main method

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   main method


 Q1601. Which of the following is false about Constructors ?

a. Constructor can be overloaded
b. A no argument constructor is provided by the compiler if we declare only constructors with arguments.
c. Constructors shouldn't have any return types , not even void.
d. If super is not explicitly called, still super() is intrinsically added by the compiler.
Core Java
Ans. A no argument constructor is provided by the compiler if we declare only constructors with arguments.

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   oops   constructor

Try 2 Question(s) Test


 Q1602. Variables of an interface are intrinsically ...

a. transient
b. final
c. public
d. static
Ans. b,c and d i.e final , public and static

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   interface   interface variables


 Q1603. Which of the following class creates mutable objects ?

a. Boolean
b. File
c. String
d. StringBuffer
Ans. StringBuffer

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   immutable  immutability


 Q1604. Which of the following is not true for final variables ?

a. They cannot be changed after initialization
b. They can be initialized within static method
c. They can be declared and initialized together at the same place
d. They can be initialized within constructor
Ans. They can be initialized within static method

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   final   final variable   java keywords


 Q1605. Which of the following is false for final ?

a. Final methods cannot be overriden
b. Final methods cannot be overloaded
c. Final classes cannot be subclassed
d. Final class cannot be abstract
Ans. Final methods cannot be overloaded

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   final   java keyword


 Q1606. Invoking start twice on same thread leads to ..

a. ClassCastException
b. NullPointerException
c. InterruptedException
d. IllegalStateException
Ans. IllegalStateException

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   exception   threads


 Q1607. Which of the following is false about var args ?

a. Var Args argument should have data type followed by three dots
b. Three dots should be consecutive and not separated by even space
c. We cannot have space before and after the dots
d. If there is a var args in the method, it should be only one and the last one.
Ans. We cannot have space before and after the dots

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   var args

Try 2 Question(s) Test


 Q1608. Which of the following is not valid var args declaration ?

a. int sum (int... numbers)
b. int sum (.int .. numbers)
c. int sum (int ... numbers)
d. int sum (int x, int ... numbers)
Ans. int sum (.int .. numbers)

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   var args

Try 2 Question(s) Test


 Q1609. Strings in switch were introduced in Which Java version ? a. Java 5 b. Java 6 c. Java 7 d. JavaCore Java
Ans. Java 7

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   switch   string in switch


 Q1610. Which of the following doesn't extend Collection interface ?

a. Set
b. List
c. Map
d. Queue
Core Java
Ans. Map

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   collections   collection interface


 Q1611. What is an instance variable?

a. An instance or object of an class
b. The field of an object
c. Any variable of a class
d. None of the above
Ans. The field of an object

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   oops   oop   instance variable   variables


 Q1612. Which of the following do you think is the primary reason you would never use a static class even the application doesn't need multiple requests or threads ?

a. Serialization
b. Runtime Polymorphism
c. Lazy Loading
d. Memory
Ans. Runtime Polymorphism

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     static class   static vs singleton   java   oops   objects  Runtime Polymorphism


 Q1613. Which of the following combination of keywords is illegal in Java ?

a. static and transient
b. transient and final
c. static and synchronized
d. abstract and final
Core Java
Ans. abstract and final

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   java keywords     Asked in 2 Companies      basic


 Q1614. Which of the following keyword is not permitted for outer class ?

a. public
b. abstract
c. final
d. protected
Ans. protected

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   java keywords


 Q1615. Which of the following Java feature promotes Code Re usability ?

a. Abstraction
b. Encapsulation
c. Inheritance
d. Polymorphism
Core Java
Ans. Inheritance

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   java concepts   java features   code reusability


 Q1616. Which of the following Java feature promotes access protection or Hiding ?

a. Inheritance
b. Encapsulation
c. Abstraction
d. Composition
Core Java
Ans. Encapsulation

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   java concepts   java features   oops concepts   oops features   access protection   information hiding


 Q1617. Which of the following is not a build tool or plugin ?

a. Maven
b. Ant
c. Gradle
d. svn
Tool
Ans. svn

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   build tools


Rarely asked as it was introduced with Java 8.
 Q1618. Which keyword specify that a variable is effectively final ? a. final b. No Keyword c. Both of the above d. None of the aboveCore Java
Ans. No Keyword

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   java 8   java8   final   effectively final        rare


Rarely asked as it was introduced with Java 8.
 Q1619. Which of the following has been introduced with Java 8 ? a. StringBuffer b. StringBuilder c. StringFilter d. StringJoinerCore Java
Ans. StringJoiner

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   java8   java 8   string   stringjoiner


 Q1620. enums are intrinsically ..

a. private
b. public
c. static
d. final
Core Java
Ans. static

 Help us improve. Please let us know the company, where you were asked this question :   

   Like         Discuss         Correct / Improve     java   enum


previous 30   next 30

Help us and Others Improve. Please let us know the questions asked in any of your previous interview.

Any input from you will be highly appreciated and It will unlock the application for 10 more requests.

Company Name:
Questions Asked: