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Top Splunk Interview Questions & Answers (Update) - Guru Here are important frequently asked Splunk interview questions for freshers as well as experienced candidates Java uses Just In Time compiler to enable high performance. Just-In-Time compiler is a program that runs Java bytecode, which is a program that contains instructions that must be interpreted 21 rows · We uploaded Java interview questions and answers in various downloadable formats like pdf, doc, zip etc. All these files are very easy to download with just few clicks and its free. List two Java IDE’s? Netbeans, Eclipse, etc. List some Java keywordsunlikeC,C++keywords? Some Java keywords are import, super, finally, etc. What do you mean by Object? Object is a 08/06/ · Latest Java Interview Questions and Answers Pdf Free Download 1. What is the most important feature of Java? Java is a platform independent language. 2. What do you ... read more
These new data types are used to create objects. What is a JVM? Answer: JVM is Java Virtual Machine which is a run time environment for the compiled java class files. Explain method overloading? Answer: When a Java program contains more than one methods with the same name but different properties, then it is called method overloading. Does Java support multiple inheritances? What restrictions are placed on the location of a package statement within a source code file? Answer: A package statement must appear as the first line in a source code file eliminating blank lines and comments. What is a transient variable? Answer: A transient variable is a variable that may not be serialized. Answer: These methods have been deprecated in JDK 1. What is the immediate superclass of the Applet class? Answer: The Panel class is the immediate superclass of the Applet class.
Can we rethrow the same exception from catch handler? Answer: Yes, we can rethrow the same exception from our catch handler. If we want to rethrow checked exception from a catch block we need to declare that exception. what value is a variable of the String type automatically initialized? Answer: The default value of a String type is null. Which containers use a Flow Layout as their default layout? Answer: The Panel and Applet classes use the Flow Layout as their default layout. What modifiers may be used with an inner class that is a member of an outer class? Answer: A non-local inner class may be declared as public, protected, private, static, final, or abstract. Which java. util classes and interfaces support event handling?
Answer: The Event Object class and the Event Listener interface support event processing. oracle apex training online. What is the Vector class? Answer: The term Vector class provides the ability to implement a growable array of objects. What is a native method? Answer: A native method is a method that is applied in a language other than Java. What value does read Line return when it has reached the end of a file? Answer: The readLine method returns null when it has reached the end of a file. What is clipping? Answer: Clipping is the process of confining paint operations to a limited area or shape. Can a for statement loop indefinitely?
Answer: Yes, a for statement can loop indefinitely. For example, consider the following: for ;;. Ex : toString 4 Method name must be combination of verb and noun Ex : getCarName ,getCarNumber. Explain Java Coding Standards for Constants? Answer: Constants in java are created using static and final keywords. What is synchronization and why is it important? Answer: The term synchronization is the ability to control the access of multiple threads to shared resources. This often leads to major errors. Explain Java Coding Standards for variables? Answer: 1 Variable names should start with small letters. Ex : string,value,empName,MEP salary. Name three Component subclasses that support painting? Answer: The Canvas, Frame, Panel, and Applet classes support painting.
What is the difference between JDK and JVM? JDK JVM Full-Form: Java Development Kit Full Form: Java Virtual Machine For Development Purpose. To execute the java programs It provides all the tools, executables and binaries required to compile, debug and execute a Java Program The execution part is handled by JVM to provide machine independence. Why Java is not a pure Object Oriented language? Answer: Java supports primitive types such as int, byte, short, long, etc that why it is not said to be a pure object-oriented language. What are the access modifiers? Answer: Java provides three access controls such as public, private and protected access modifier.
Can we overload the main method? Answer: Yes, we can overload the main method with syntax as public static void main String args[]. What is the method in java? Answer: It contains the executable body that can be applied to the specific object of the class. The method includes method name, parameters or arguments and return type and a body of executable code. Syntax : type methodName Argument List {. ex: public float add int a, int b, int c methods can have multiple arguments. Separate with commas when we have multiple arguments. thrown in the method are instances of their subclass. This method gets called by the garbage collector when the object is getting garbage collected.
This method is usually overridden to release system resources when object is garbage collected. What is an abstract class? Answer : Abstract classes are used in java to create a class with some default method implementation for subclasses. An abstract class can have abstract method without body and it can have methods with implementation also. abstract keyword is used to create an abstract class. Read important points about abstract classes at java abstract class. What is the difference between Before and BeforeClass annotation? Answer : The code marker Before is executed before each test, while BeforeClass runs once before the entire test fixture. If your text class has ten tests, Before code will be executed ten times, but BeforeClass will be executed only once. In general, you would use BeforeClass when numerous tests are required to share the same computationally expensive setup code.
Starting a database connection falls into this category. You are able to move code from BeforeClass into Before, but your test run may be delayed. BeforeClass is run as a static initializer, therefore it will run before the class instance of your test fixture is created. Is it possible to make an array volatile in Java? Answer: Yes, it is possible to make an array volatile in Java, but only the reference which is pointing to an array, not the whole array. Therefore, if one thread changes the reference variable points to another array, which will provide a volatile guarantee. If the purpose is to provide memory visibility guarantee for individual indices of the array, volatile is of no practical use for you. Instead, you must rely on an alternative mechanism for thread-safety in that particular case, e. use of a synchronized keyword. From the two, which would be easier to write: synchronization code for ten threads or two threads?
Answer : Both will have the same level of complexity regarding writing the code because synchronization is independent of the number of threads, although the choice of synchronization could be subject to the number of threads because this presents more conflict. Therefore, you would opt for an advanced synchronization technique, e. lock stripping, which requires more intricate code and proficiency. Answer : A unit tests a small isolated piece of code such as a method. An integration test tests how your code plays with other systems, such as a database, a cache or a third-party application. A functional test is the testing of the complete functionality of an application. This may involve the use of an automated tool to carry out more complex user interactions with your system. What are wrapper classes? Every primitive data type has a class dedicated to it. Refer to the below image which displays different primitive type, wrapper class, and constructor argument.
What is the difference between equals and? Answer: Equals method is defined in Object class in Java and used for checking equality of two objects defined by business logic. public boolean equals Object o is the method provided by the Object class. For example, method can be overridden like String class. equals method is used to compare the values of two objects. What is the difference between abstract classes and interfaces? An interface cannot provide any code at all, just the signature. In the case of an abstract class, a class may extend only one abstract class. A Class may implement several interfaces. An abstract class can have non-abstract methods. All methods of an Interface are abstract. An abstract class can have instance variables. An Interface cannot have instance variables An abstract class can have any visibility: public, private, protected.
An Interface visibility must be public or none. If we add a new method to an abstract class then we have the option of providing default implementation and therefore all the existing code might work properly If we add a new method to an Interface then we have to track down all the implementations of the interface and define implementation for the new method An abstract class can contain constructors An Interface cannot contain constructors Abstract classes are fast Interfaces are slow as it requires extra indirection to find the corresponding method in the actual class. What are the important benefits of using Hibernate Framework? Answer: Some of the important benefits of using hibernate framework are: Hibernate eliminates all the boiler-plate code that comes with JDBC and takes care of managing resources, so we can focus on business logic. Hibernate framework provides support for XML as well as JPA annotations, that makes our code implementation independent.
Hibernate provides a powerful query language HQL that is similar to SQL. However, HQL is fully object-oriented and understands concepts like inheritance, polymorphism, and association. Hibernate is an open source project from Red Hat Community and used worldwide. This makes it a better choice than others because the learning curve is small and there are tons of online documentation and help is easily available in forums. Hibernate cache helps us in getting better performance. For database vendor-specific feature, hibernate is suitable because we can also execute native sql queries.
Overall hibernate is the best choice in the current market for ORM tool, it contains all the features that you will ever need in an ORM tool. What are the differences between getting and load method? Answer: The differences between getting and load methods are given below. get load 1 Returns null if the object is not found. Throws ObjectNotFoundException if the object is not found. It returns a proxy object. It should be used if you are sure that the instance exists. What are the advantages of Hibernate over JDBC? Answer: Some of the important advantages of Hibernate framework over JDBC are: Hibernate removes a lot of boiler-plate code that comes with JDBC API, the code looks cleaner and readable.
Hibernate supports inheritance, associations, and collections. These features are not present with JDBC API. In JDBC API, we need to write code for transaction management using commit and rollback. JDBC API throws SQLException that is a checked exception, so we need to write a lot of try-catch block code. Hibernate built-in transaction management removes the usage of try-catch blocks. Hibernate Query Language HQL is more object oriented and close to java programming language. For JDBC, we need to write native sql queries. Hibernate supports caching that is better for performance, JDBC queries are not cached hence performance is low. Hibernate provide option through which we can create database tables too, for JDBC tables must exist in the database. Hibernate configuration helps us in using JDBC like connection as well as JNDI DataSource for the connection pool. This is a very important feature in enterprise application and completely missing in JDBC API.
Hibernate supports JPA annotations, so code is independent of the implementation and easily replaceable with other ORM tools. JDBC code is very tightly coupled with the application. In case you are facing any challenges with these java interview questions, please comment on your problems in the section below. Apart from this Java Interview Questions Blog, if you want to get trained from professionals on this technology, you can opt for structured training from edureka! Click below to know more. What are the life-cycle methods for a jsp? Answer: Method Description public void jspInit It is invoked only once, same as init method of servlet. public void jspDestroy It is invoked only once, same as destroy method of servlet. What are the JSP implicit objects? Answer: JSP provides 9 implicit objects by default. They are as follows: Object Type 1 out JspWriter 2 request HttpServletRequest 3 response HttpServletResponse 4 config ServletConfig 5 session HttpSession 6 application ServletContext 7 pageContext PageContext 8 page Object 9 exception Throwable.
What is the association? Answer : Association is a relationship where all object have their own lifecycle and there is no owner. Multiple students can associate with a single teacher and a single student can associate with multiple teachers but there is no ownership between the objects and both have their own lifecycle. This relationship can be one to one, One to many, many to one and many to many. What do you mean by aggregation? Toggle navigation. Home GK Computer TRB TNPSC Aptitude English Reasoning Technical Bank Exams Engineering Puzzles Interview GD Topics Online Test.
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or Login. Login to Your Account. Remember Me? Register Forget Password. Results 1 to 5 of 5. Thread: Latest Java Interview Questions and Answers Pdf Free Download. Popular topic for study. LDPC codes are linear block codes with a particular structure for the parity check matrix Read this topic. Thread Tools Show Printable Version. devsuroor View Profile View Forum Posts Private Message View Blog Entries View Articles. Gender: : Male Branch: : Information Technology Engineering City : Delhi. Latest Java Interview Questions and Answers Pdf Free Download 1. What is the most important feature of Java? Java is a platform independent language. What do you mean by platform independence? Platform independence means that we can write and compile the java code in one platform eg Windows and can execute the class in any other supported platform eg Linux,Solaris,etc.
Are JVM's platform independent? JVM's are not platform independent. JVM's are platform specific run time implementation provided by the vendor. What is a JVM? JVM is Java Virtual Machine which is a run time environment for the compiled java class files. What is the difference between a JDK and a JVM? JDK is Java Development Kit which is for development purpose and it includes execution environment also. But JVM is purely a run time environment and hence you will not be able to compile your source files using a JVM. Download Attachment Attached Files for Direct Download.
Latest Java Interview Question. Kanika chauhan View Profile View Forum Posts Private Message View Blog Entries View Articles. Gender: : Female City : Ankleshwar. Re: Latest Java Interview Questions and Answers Pdf Free Download Hey, These are really nice notes. Faadoo alwayz rockxxxxxxxxxxx. harisxyz View Profile View Forum Posts Private Message View Blog Entries View Articles. Branch: : Aeronautical Engineering. Re: Latest Java Interview Questions and Answers Pdf Free Download 1. How to define a constant variable in Java? The variable should be declared as static and final. So only one copy of the variable exists for all instances of the class and the value can't be changed also.
Should a main method be compulsorily declared in all java classes? No not required. main method should be defined only if the source class is a java application. What is the return type of the main method? Main method doesn't return anything hence declared void. Why is the main method declared static? main method is called by the JVM even before the instantiation of the class hence it is declared as static. Nosherwan View Profile View Forum Posts Private Message View Blog Entries View Articles. Branch: : Information Technology Engineering. Re: Latest Java Interview Questions and Answers Pdf Free Download superbbbbbbbbbbbbbb cha gay faadooooooo. ajaytopgun View Profile View Forum Posts Private Message View Blog Entries View Articles.
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08/06/ · Latest Java Interview Questions and Answers Pdf Free Download 1. What is the most important feature of Java? Java is a platform independent language. 2. What do you List two Java IDE’s? Netbeans, Eclipse, etc. List some Java keywordsunlikeC,C++keywords? Some Java keywords are import, super, finally, etc. What do you mean by Object? Object is a Top Splunk Interview Questions & Answers (Update) - Guru Here are important frequently asked Splunk interview questions for freshers as well as experienced candidates java interview questions pdf Archives - FreeCourseSite - Download Udemy Paid Courses For Free Tag - java interview questions pdf Free Udemy Courses Core Java Interview JAVA Interview Questions What are the states associated in the thread? Thread contains ready, running, waiting and dead states. What is synchronization? Synchronization is the Java uses Just In Time compiler to enable high performance. Just-In-Time compiler is a program that runs Java bytecode, which is a program that contains instructions that must be interpreted ... read more
What is JVM and is it platform independent? All these files are very easy to download with just few clicks and its free. Register Forget Password. Ex : toString 4 Method name must be combination of verb and noun Ex : getCarName ,getCarNumber. c plus xml linq questions c sharp. In JDBC API, we need to write code for transaction management using commit and rollback. For example, in the following class two objects are created using new keyword and hence, constructor is invoked two times.
Answer: Java Development Kit JDK is for development purpose and JVM is a part of it to execute the java programs. Explain about abstract classes in java? After creation of this string object, all built-in methods of String class can be used on the string object. Popular topic for study. Explore Online Courses Free Courses Interview Questions Tutorials Community. Provide a default set of root Certification Authority CA certificates in the JDK.
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