QUIZ ON : java - JAVA INTRODUCTION

JAVA INTRODUCTION

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Question No# : 01 out of 21

What is a set of pseudo machine language instructions that are understood by the Java Virtual Machine and are independent of the underlying hardware called?

A. JVM

B. Source Code

C. Compilation

D. Bytecode

Question No# : 02 out of 21

IS-A relationship in java is related to

A. Inheritance

B. Encapsulation

C. Composition

D. None

Question No# : 03 out of 21

Following concept can be used for encapsulation in java programs

A. Wrapping data fields with methods

B. Hiding data and internal methods using access modifiers in a class

C. Using Interfaces

D. All of the above

Question No# : 04 out of 21

Runtime polymorphism feature in java is

A. method overriding

B. method overloading

C. constructor overloading

D. operator overloading

Question No# : 05 out of 21

Which among the following is a logical error?

A. Missing semicolon

B. Mismatched braces in classes and methods

C. Misspelled keywords and identifiers

D. Addition is required but subtraction is performed

Question No# : 06 out of 21

What is the extension of a source code in Java?

A. .java

B. .class

C. Both a and b

D. None of these

Question No# : 07 out of 21

Which among the following is not a language feature in Java?

A. Robust

B. Secured

C. Platform Independent

D. Procedure Oriented

Question No# : 08 out of 21

Which among the following represents a syntax error?

A. Dividing an integer by zero.

B. Accessing an element that is out of bounds of an array.

C. Trying to store a value which is incompatible to a certain data-type.

D. Missing semicolon

Question No# : 09 out of 21

What is the extension of the byte code in Java?

A. .java

B. .class

C. Both a and b

D. None of these

Question No# : 10 out of 21

Which concept of Java is a way of converting real world objects in terms of class?

A. Polymorphism

B. Encapsulation

C. Abstraction

D. Inheritance

Question No# : 11 out of 21

What is Java Programming Language?

A. A runtime system

B. A set of development tools

C. An Application Programming Interface (API)

D. All of these

Question No# : 12 out of 21

What was Java initially called?

A. Oak

B. C

C. C++

D. None of these

Question No# : 13 out of 21

A Virtual Processor that is implemented in software and runs using the capabilities provided by your operating system and computer hardware.

A. Byte Code

B. Compiler

C. Interpreter

D. Java Virtual Machine(JVM)

Question No# : 14 out of 21

Encapsulation concept in java is

A. Hiding complexity

B. Method hiding

C. Hiding constructor

D. None

Question No# : 15 out of 21

Java object oriented programming concepts is/are

A. Encapsulation

B. Inheritance

C. polymorphism

D. All of the above

Question No# : 16 out of 21

Name the programs that can be developed in such a way that it remains embedded in a web page and runs on the viewer’s machine in a secured manner by Java compatible browsers.

A. Applets

B. Applications

C. Both a and b

D. None of these

Question No# : 17 out of 21

Name the process that converts source code to bytecode.

A. Interpretation

B. Compilation

C. All of these

D. None of these

Question No# : 18 out of 21

Java does not support _______________

A. Inheritance

B. Multiple inheritance for classes

C. multiple inheritance of interface

D. compile time polymorphism

Question No# : 19 out of 21

A set of instructions given to a computer to do a particular task.

A. Program

B. High level Language

C. Object

D. None of these

Question No# : 20 out of 21

Name the Application program that is written and compiled which may then be executed in any machine provided it contains the JVM.

A. Applets

B. Applications

C. Both a and b

D. None of these

Question No# : 21 out of 21

Which among the following is not a valid error in Java?

A. Syntax errors

B. Logical errors

C. Run-time errors

D. Technical errors