JAVA PRACTICE EXAM 2025 QUESTIONS AND ANSWERS

JAVA PRACTICE EXAM 2025
QUESTIONS AND ANSWERS


Backspace - ANSWER✔✔-\b


Tab - ANSWER✔✔-\t


Linefeed - ANSWER✔✔-\n


carriage return - ANSWER✔✔-\r


single quote - ANSWER✔✔-\'


Double quote - ANSWER✔✔-\"


backslash - ANSWER✔✔-\\


form feed - ANSWER✔✔-\f


Octal character - ANSWER✔✔-\ddd


Hexadecimal unicode - ANSWER✔✔-\uxxx

,whats an expression - ANSWER✔✔-can have a single variable or constant or can consist

of operators and operands


___________ is interpreted. - ANSWER✔✔-Java


_______________is the brain of the computer - ANSWER✔✔-CPU


Which JDK command is correct to run a Java application - ANSWER✔✔-Java Bytecode


__________is Architecture-neutral - ANSWER✔✔-Java


__________ is software that interprets Java bytecode - ANSWER✔✔-Java Compiler


Java compiler translates Java source code into ___________. - ANSWER✔✔-Java

bytecode


______________is a program that runs on a computer to manage and control a

computers activness - ANSWER✔✔-Opertating system


Java was developed by - ANSWER✔✔-Sun Microsystems


programming style is important because_______________. - ANSWER✔✔-good

programming style helps reduce programming errors


Why do computers use zeros and ones - ANSWER✔✔-because digital devices have two

stable states and it is natural to use one state for 0 and the other for 1.


Java_____________ can run from a Web browser - ANSWER✔✔-applets

,Application program interface. Contains predefined classes and interfaces for

developing Java programs. - ANSWER✔✔-Java API


Java Development Toolkit. A set of separate programs, each invoked from a command

line, for developing and testing Java programs. - ANSWER✔✔-Java JDK


A specification for software which interprets Java programs that have been compiled

into byte-codes, and usually stored in a ".class" file. - ANSWER✔✔-Java Virtual

Machine


public class Class {


public static void main(String[] args) { - ANSWER✔✔-Main method


Boolean variables - ANSWER✔✔-Hold either 'true' or 'false'


________ consists of a set of separate programs for developing and testing Java

programs, each of which is invoked from a command line - ANSWER✔✔-Java JDK


The JDK command to compile a class in the file Test.java is - ANSWER✔✔-Javac Test


The extension name of a Java bytecode file is - ANSWER✔✔-.exe


________ is a software that interprets Java bytecode - ANSWER✔✔-Java virtual

machine


Computer can execute the code in ___________ - ANSWER✔✔-machine language

, A block is enclosed inside __________ - ANSWER✔✔-Braces


_______ consists of a set of separate programs for developing and testing Java

programs, each of which is invoked from a command line - ANSWER✔✔-Java JDK


The extension of the binary output created by a Java program is? - ANSWER✔✔-.class


On successful compilation a file with the class extension is created - ANSWER✔✔-true


Which JDK command is correct to run a Java application in ByteCode.class -

ANSWER✔✔-Java bytecode


__________ translates high-level language program into machine language program -

ANSWER✔✔-A compiler


____________is the physical aspect of the computer that can be seen. - ANSWER✔✔-

Hardware


Speed of a computer can be measured in____________________. - ANSWER✔✔-giga

and merga hertz


One byte has ________ bits. - ANSWER✔✔-8


If a program compiles fine, but it produces incorrect result, then the program suffers

________. - ANSWER✔✔-a logic error


Is an object oriented language - ANSWER✔✔-Java, C++, Python