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J2SE Interview Questions & Answers - Learning Mode

J2SE Interview Questions & Answers - Learning Mode

Java SE (formerly J2SE) is the basic Java environment. In Java SE, you make all the "standards" programs with Java, using the API described here. You only need a JVM to use Java SE. Java EE (formerly J2EE) is the enterprise edition of Java. Java SE was known as Java 2 Platform, Standard Edition or J2SE from version 1.2 until version 1.5. The "SE" is used to distinguish the base platform from the Enterprise Edition (Java EE) and Micro Edition (Java ME) platforms. J2SE stands for Java 2 standard edition and is normally used for developing desktop applications. It usually contains core part of Java with GUI(AWT and swings).

Try J2SE Interview Questions & Answers - Exam Mode

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J2SE Interview Questions & Answers - Learning Mode
Try J2SE Interview Questions & Answers - Exam Mode
Question: What is break?

Answer: A Java keyword used to resume program execution at the statement immediately following the current statement. If followed by a label, the program resumes execution at the labeled statement. Source:
Question: What is catch?

Answer: A Java keyword used to declare a block of statements to be executed in the event that a Java exception, or run time error, occurs in a preceding try block. Source:
Question: What is API?

Answer: Application Programming Interface. The specification of how a programmer writing an application accesses the behavior and state of classes and objects. Source:
Question: What is IP ?

Answer: Internet Protocol. The basic protocol of the Internet. It enables the unreliable delivery of individual packets from one host to another. It makes no guarantees about whether or not the packet will be delivered, how long it will take, or if multiple packets will arrive in the order they were sent. Protocols built on top of this add the notions of connection and reliability. See also TCP/IP. Source:
Question: What is Java Naming and Directory Interface (JNDI) ?

Answer: A set of APIs that assists with the interfacing to multiple naming and directory services. Source:
Question: What is "abstract schema"?

Answer: The part of an entity bean's deployment descriptor that defines the bean's persistent fields and relationships. Source:
Question: What is authentication ?

Answer: The process by which an entity proves to another entity that it is acting on behalf of a specific identity. Source:
Question: What is casting?

Answer: Explicit conversion from one data type to another. Source:
Question: What is atomic?

Answer: Refers to an operation that is never interrupted or left in an incomplete state under any circumstance. Source:
Question: What is boolean?

Answer: Refers to an expression or variable that can have only a true or false value. The Java programming language provides the boolean type and the literal values true and false. Source:
Question: What is Java Media APIs ?

Answer: 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. Source:
Question: What is abstract class ?

Answer: A class that contains one or more abstract methods, and therefore can never be instantiated. Abstract classes are defined so that other classes can extend them and make them concrete by implementing the abstract methods. Source:
Question: What is access control ?

Answer: The methods by which interactions with resources are limited to collections of users or programs for the purpose of enforcing integrity, confidentiality, or availability constraints. Source:
Question: What is deprecation ?

Answer: Refers to a class, interface, constructor, method or field that is no longer recommended, and may cease to exist in a future version. Source:
Question: What is Internet ?

Answer: An enormous network consisting of literally millions of hosts from many organizations and countries around the world. It is physically put together from many smaller networks and data travels by a common set of protocols. Source:
Question: What is bitwise operator?

Answer: An operator that manipulates the bits of one or more of its operands individually and in parallel. Examples include the binary logical operators (&, |, ^), the binary shift operators (<< , >>, >>> ) and the unary one's complement operator (~). Source:
Question: What is Java Compatibility Kit (JCK) ?

Answer: A test suite, a set of tools, and other requirements used to certify a Java platform implementation conformant both to the applicable Java platform specifications and to Java Software reference implementations. Source:
Question: What is interpreter ?

Answer: A module that alternately decodes and executes every statement in some body of code. The Java interpreter decodes and executes bytecode for the Java virtual machine1. See also compiler, runtime system. Source:
Question: What is Abstract Window Toolkit (AWT) ?

Answer: A collection of graphical user interface (GUI) components that were implemented using native-platform versions of the components. These components provide that subset of functionality which is common to all native platforms. Largely supplanted by the Project Swing component set. See also Swing. Source:
Question: What is ACID?

Answer: The acronym for the four properties guaranteed by transactions: atomicity, consistency, isolation, and durability. Source:

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Latest 20 Questions
Payment of time- barred debt is: (a) Valid (b) Void (c) Illegal (d) Voidable
Consideration is defined in the Indian Contract Act,1872 in: (a) Section 2(f) (b) Section 2(e) (c) Section 2(g) (d) Section 2(d)
Which of the following is not an exception to the rule, "No consideration, No contract": (a) Natural love and affection (b) Compensation for involuntary services (c) Completed gift (d) Agency
Consideration must move at the desire of: (a) The promisor (b) The promisee (c) The promisor or any other party (d) Both the promisor and the promisee
An offer which is open for acceptance over a period of time is: (a) Cross Offer (b) Counter Offer (c) Standing Offer (d) Implied Offer
Specific offer can be communicated to__________ (a) All the parties of contract (b) General public in universe (c) Specific person (d) None of the above
_________ amounts to rejection of the original offer. (a) Cross offer (b) Special offer (c) Standing offer (d) Counter offer
A advertises to sell his old car by advertising in a newspaper. This offer is caleed: (a) General Offer (b) Special Offer (c) Continuing Offer (d) None of the above
In case a counter offer is made, the original offer stands: (a) Rejected (b) Accepted automatically (c) Accepted subject to certain modifications and variations (d) None of the above
In case of unenforceable contract having some technical defect, parties (a) Can sue upon it (b) Cannot sue upon it (c) Should consider it to be illegal (d) None of the above
If entire specified goods is perished before entering into contract of sale, the contract is (a) Valid (b) Void (c) Voidable (d) Cancelled
______________ contracts are also caled contracts with executed consideration. (a) Unilateral (b) Completed (c) Bilateral (d) Executory
A offers B to supply books @ Rs 100 each but B accepts the same with condition of 10% discount. This is a case of (a) Counter Offer (b) Cross Offer (c) Specific Offer (d) General Offer
_____________ is a game of chance. (a) Conditional Contract (b) Contingent Contract (c) Wagering Contract (d) Quasi Contract
There is no binding contract in case of _______ as one's offer cannot be constructed as acceptance (a) Cross Offer (b) Standing Offer (c) Counter Offer (d) Special Offer
An offer is made with an intention to have negotiation from other party. This type of offer is: (a) Invitation to offer (b) Valid offer (c) Voidable (d) None of the above
When an offer is made to the world at large, it is ____________ offer. (a) Counter (b) Special (c) General (d) None of the above
Implied contract even if not in writing or express words is perfectly _______________ if all the conditions are satisfied:- (a) Void (b) Voidable (c) Valid (d) Illegal
A specific offer can be accepted by ___________. (a) Any person (b) Any friend to offeror (c) The person to whom it is made (d) Any friend of offeree
An agreement toput a fire on a person's car is a ______: (a) Legal (b) Voidable (c) Valid (d) Illegal
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