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“J2SE Interview Questions and Answers will teach you now that Java Platform, Standard Edition or Java SE is a widely used platform for programming in the Java language. It is the Java Platform used to deploy portable applications for general use. In practical terms, Java SE consists of a virtual machine. So learn J2SE by this Java Platform, Standard Edition Interview Questions with Answers guide”



206 J2SE Questions And Answers

81⟩ What is deprecation?

Refers to a class, interface, constructor, method or field that is no longer recommended, and may cease to exist in a future version.

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82⟩ What is continue?

A Java keyword used to resume program execution at the end of the current loop. If followed by a label, continue resumes execution where the label occurs.

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83⟩ What is CORBA?

Common Object Request Broker Architecture. A language independent, distributed object model specified by the Object Management Group (OMG).

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84⟩ What is delegation?

An act whereby one principal authorizes another principal to use its identity or privileges with some restrictions.

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85⟩ What is if?

A Java keyword used to conduct a conditional test and execute a block of statements if the test evaluates to true.

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86⟩ What is Java Platform Editions?

A Java platform "edition" is a definitive and agreed-upon version of the Java platform that provides the functionality needed over a broad market segment. An edition is comprised of two kinds of API sets: (i) "core packages," which are essential to all implementations of a given platform edition, and (ii) "optional packages," which are available for a given platform edition and which may be supported in a compatible implementation.

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87⟩ What is Java virtual machine1?

A software "execution engine" that safely and compatibly executes the byte codes in Java class files on a microprocessor (whether in a computer or in another electronic device).

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88⟩ What is Java Remote Method Invocation (RMI)?

A distributed object model for Java program to Java program, in which the methods of remote objects written in the Java programming language can be invoked from other Java virtual machines1, possibly on different hosts.

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90⟩ What is Java Development Kit (JDK)?

A software development environment for writing applets and applications in the Java programming language. Technically, the JDK is the correct name for all versions of the Java platform from 1.0 to 1.1.x.

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92⟩ What is Java Media APIs?

A set of APIs that support the integration of audio and video clips, 2D fonts, graphics, and images as well as 3D models and telephony.

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94⟩ What is Java Database Connectivity (JDBC)?

An industry standard for database-independent connectivity between the Java platform and a wide range of databases. The JDBC provides a call-level API for SQL-based database access.

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98⟩ What is Java Native Interface?

A standard programming interface for writing Java native methods and embedding the JVM into native applications. The primary goal is binary compatibility of native method libraries across all JVM implementations on a given platform.

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99⟩ What is Java Interface Definition Language (IDL)?

A set of Java APIs that provide CORBA (Common Object Request Broker Architecture) interoperability and connectivity capabilities for the J2EE platform. These capabilities enable J2EE applications to invoke operations on remote network services using the OMG IDL and IIOP.

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100⟩ What is JAR?

JAR (Java Archive) is a platform-independent file format that aggregates many files into one. Multiple applets written in the Java programming language, and their requisite components (.class files, images, sounds and other resource files) can be bundled in a JAR file and subsequently downloaded to a browser in a single HTTP transaction. It also supports file compression and digital signatures.

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