CBSE Class 12 Computer Science Java Basics MCQs Set A

Question: Java is an object-oriented programming language developed by _______.

a) Oracle

b) Sun Micro systems

c) Unix

d) Netscape

Answer: Sun Micro systems

Question: _______ is a company best known for its high-end Unix workstations.

a) Oracle

b) Sun Micro systems

c) Unix

d) Netscape

Answer: Sun Micro systems

Question: Modeled after C++, the _____ language was designed to be small, simple and portable across platforms and operating systems both at the source and at the binary level.

a) Java

b) C

c) Basic

d) PHP

Answer: Java

Question: Java language was developed at Sun Micro systems in _____

a) 1993

b) 1992

c) 1991

d) 1990

Answer: 1992

Question: _______ is small, fast, efficient and easily portable to a wide range of hardware devices.

a) Java

b) C

c) Basic

d) PHP

Answer: Java

Question: ______ language is considered as one of the ideal language for distributing executable programs via the World Wide Web.

a) Java

b) C

c) Basic

d) PHP

Answer: Java

Question: Java is also a general-purpose programming language for developing programs that are \ easily usable and portable across different.

a) Tables

b) Stands

c) Libraries

d) Platforms

Answer: Platforms

Question: Java is an __________ language and here it differs from C.

a) Procedure-oriented

b) Structure-oriented

c) Object-oriented

d) Executable-oriented

Answer: Object-oriented

Question: Using _______one can take full advantage of object-oriented methodology and its capabilities of creating flexible, modular and reusable code.

a) Java

b) C

c) Basic

d) PHP

Answer: Java

Question: Java includes a set of ___________that provide basic data types, system input and output capabilities and other utility functions.

a) Class libraries

b) Class functions

c) Class methods

d) All of these

Answer: Class libraries

Question: These basic classes are part of the ________ .

a) KDJ

b) JDK

c) DKJ

d) DJK

Answer: JDK

Question: _______ has classes to support networking, common Internet protocols and user interface toolkit functions.

a) KDJ

b) JDK

c) DKJ

d) DJK

Answer: JDK

Question: ______ is platform-independent at both the source and binary level.

a) Java

b) C

c) Basic

d) PHP

Answer: Java

Question: ______ independence is a program's capability of being moved easily from one computer system to another.

a) Table

b) Program

c) Library

d) Platform

Answer: Platform

Question: At the ______ level, Java's primitive data types have consistent sizes across all development platforms.

a) Beginning

b) Destination

c) Source

d) Binary

Answer: Source

Question: At ______ level, platform-independence is possible due to byte code interpreter.

a) Beginning

b) Destination

c) Source

d) Binary

Answer: Binary

Question: The designers of Java chose to use a combination of ______ and interpretation.

a) Assembling

b) Compilation

c) Togetherness

d) All of these

Answer: Compilation

Question: Full form of JDK is_________

a) Java Developing Kit

b) Java Development Kit

c) Both (A) and (B)

d) None of these

Answer: Java Development Kit

Question: Programs written in Java are compiled into____________language for a computer that doesn't really exist.

a) Machine

b) Assembly

c) C++

d) Java

Answer: Machine

Question: The so-called "virtual" computer is known as

a) JMV

b) VMJ

c) JVM

d) MVJ 21)

Answer: JVM

Question: The full form of JVM is____________

a) Java Virtual Machine

b) Java Visible Machine

c) Java Viable Machine

d) None of these

Answer: Java Virtual Machine

Question: The machine language for the Java Virtual Machine is called Java___________

a) byte

b) byte numbers

c) byte code

d) bytes

Answer: byte code

Question: Different Java byte code__________is needed for each type of computer.

a) Compiler

b) Interpreter

c) Translator

d) None of these

Answer: Interpreter

Question: Java binary files are actually in a form called________that is not specific to any one processor or any operating system.

a) bytes

b) binary numbers

c) byte codes

d) byte

Answer: byte codes

Question: A disadvantage of using__________is its slow execution speed.

a) ASCII codes

b) binary numbers

c) byte codes

d) bytes

Answer: byte codes

Question: There are tools available tools to convert________into native code.

a) Java Byte codes

b) Java Language

c) Java Complies

d) All of these

Answer: Java Byte codes

Question: __________code is faster to execute, but then it does not remain machine independent.

a) Native

b) Original

c) ASCII

d) Binary

Answer: Native

Question: A Java Program should have at least one____________and it must have main___________in it

a) Class, procedure

b) Class, variable

c) Class, method

d) Class, code

Answer: Class, method

Question: A Java program is composed of____________

a) Functions

b) Classes

c) Programs

d) Variables

Answer: Classes

Question: C programmers can think of a class as a sort of creating a new composite data type by using_________and________

a) Structures, type

b) Functions, define

c) Classes, type def

d) Struct, type def

Answer: Struct, type def

Question: _______________can provide much more than just a collection of data.

a) Functions

b) Classes

c) Programs

d) Variables

Answer: Classes

Question: Note that__________is not available in Java.

a) Type def

b) Struct

c) Both (A) and (B)

d) All of these

Answer: Both (A) and (B)

Question: Java source file can be created using any plain_______text editor.

a) Native

b) Original

c) ASCII

d) Binary

Answer: ASCII

Question: Java_____files are given the same name as the class defined with an extension of Java.

a) Beginning

b) Destination

c) Source

d) Binary

Answer: Source

Question: In Java the_______name is case sensitive.

a) Folder

b) Class

c) First

d) Last

Answer: Class

Question: In Java the______name is case sensitive.

a) File

b) Folder

c) First

d) Last

Answer: File

Question: If class name is CallCost, filename should be

a) callcost

b) callcost.java

c) callCost.java

d) callcosT.java

Answer: callCost.java

Question: The source file is compiled using the_______compiler.

a) S Cite

b) C++

c) Basic

d) Java

Answer: Java

Question: To compile the Java program, type________followed by the name the source file

a) javac

b) JavaC

c) Java

d) cjava

Answer: javac

Question: When the program gets compiled without errors, compiler created a file with extension________in the same directory as the source file

a) .Java

b) .javac

c) .class

d) .javaclass

Answer: .class

Question: The programmer can run the application using Java______

a) Compiler

b) Translator

c) Interpreter

d) None of these

Answer: Interpreter

Question: In_______the Java interpreter is called by simply using Java

a) JDK

b) JKD

c) JDD

d) JKK

Answer: JDK

Question: Which of the following variable declarations is correct ?

a) Double balance

b) Double rate

c) Double duration

d) Double cost

Answer: Double rate

Question: Java source program file should have extension

a) Java

b) .javac

c) .class

d) .javaclass

Answer: Java

Question: The name of_______is same as the class name containing main method and it has an extension .class.

a) Interpreted file

b) Code file

c) Compiled file

d) byte code file

Answer: byte code file

Question: A________'Java' interprets byte code and excuses it.

a) Compiler

b) Translator

c) Interpreter

d) None of these

Answer: Interpreter

Question: The texts after________are comments.

a) //

b) \\

c) // //

d) \\ \\

Answer: //

Question: The text enclosed within_________are comments.

a) /& and &/

b) /* and */

c) /* and *\

d) //* and *//

Answer: /* and */

Question: Comments are not compiled or interpreted

a) Codes

b) Classes

c) Comments

d) Methods

Answer: Comments

Question: Variables are declared using___________followed by variable name

a) Data type

b) Int

c) Char

d) Float

Answer: Data type

Question: Several___________(also called function or method in Java) call statements are used to display information to the user of the program

a) Super routine

b) Subroutine

c) Sub program

d) None of these

Answer: Subroutine

Question: Computation part contains expressions including assignment___________

a) Sentences

b) Numerical

c) Operators

d) Statements

Answer: Statements

Question: ____________are used to display results.

a) Methods

b) Classes

c) Outputs

d) Prints

Answer: Methods

Question: System.out.print and System.out.println are_________which take a value to be displayed as an argument.

a) Methods

b) Classes

c) Outputs

d) Prints

Answer: Methods

Question: ___________adds a line feed after the end of the information that it displays.

a) out.print

b) out.prindnt

c) output.print

d) output.println

Answer: out.prindnt

Question: When the program is run, the Java interpreter calls the__________method and the statements that it contains are executed.

a) Main()

b) String[]

c) string[] args

d) main()

Answer: main()

Question: The___________routine can call other subroutines that are defined in the same class or even in other classes.

a) Main()

b) String[]

c) string[] args

d) main()

Answer: main()

Question: It is the_________routine that determines how and in what the other subroutines are used.

a) Main()

b) String[]

c) string[] args

d) main()

Answer: main()

Question: The word in the first line of main() means that this routine can be called from outside the program

a) private

b) Public

c) public

d) Private

Answer: public

Question: This is essential because the main() routine is called by the Java interpreter, which is__________to the program

a) External

b) Internal

c) Outside

d) Inside

Answer: External

Question: T&E first four data types hold_____

a) Real numbers

b) Integers

c) Single character

d) True or False

Answer: Integers

Question: The next two data types hold_____

a) Real numbers

b) Integers

c) Single character

d) True or False

Answer: Real numbers

Question: Char data type holds a single character from the Unicode character set.

a) Real numbers

b) Integers

c) Single character

d) True or False

Answer: Single character

Question: The Boolean data type holds one of the two logical values true or false.

a) Real numbers

b) Integers

c) Single character

d) True or False

Answer: True or False

Question: The data types in Java are called______as they are built into the system.

a) Fixed

b) Ancient

c) Primitive

d) New

Answer: Primitive

Question: In Java the______are machine-independent, this means that they can be relied on their sizes and characteristics to be consistent across all Java programs on all machines.

a) Data Types

b) Variables

c) Literals

d) All of these

Answer: Data Types

Question: _____in Java are complaint with IEEE 754 (an international standard for defining floating point numbers and arithmetic).

a) Real numbers

b) Integers

c) Single character

d) True or False

Answer: Real numbers

Question: Integer numbers with b bits_____store signed values in the range of (-2^b_1 -1, 2^b_1). 

a) Accuracy

b) Precision

c) Exactness

d) Vagueness

Answer: Precision

Question: When the Integer numbers are preceded with keyword_____the values are in the range of (0, 2^b_1). 

a) Signed

b) Unsigned

c) Boolean

d) Byte

Answer: Unsigned

Question: Java uses the Unicode_______set.

a) Numerical

b) IEEE

c) Character

d) None of these

Answer: Character

Question: The char type has____bits of precision and is unsigned.

a) 13

b) 14

c) 15

d) 16

Answer: 16

Question: Data type_____is not a number, nor can it be treated as one.

a) Char

b) Real

c) Boolean

d) Integer

Answer: Boolean

Question: If anything is to be remembered by the computer, there will be a requirement of_____during program execution. It needs to be stored in the memory of the computer.

a) Variables

b) Literals

c) Comments

d) Operators

Answer: Variables

Question: ______manipulates the data that is stored in memory.

a) Information

b) Programs

c) Comments

d) Characters

Answer: Programs

Question: In machine language, data can only be referred to by giving the______address of the location in memory where it is stored.

a) Numerical

b) Alphanumeric

c) Alphabetical

d) Real

Answer: Numerical

Question: In a______language such as Java, names are used instead of numeric address of memory location to refer to data.

a) Low-level

b) Middle-level

c) High-level

d) Top-level

Answer: High-level

Question: A name is used to refer to the data stored in memory and it is called a_____

a) Variable

b) Literal

c) Comment

d) Operator

Answer: Variable

Question: A_____can take different data values at different times during the execution of the program, but it always refers to the same memory location.

a) Variable

b) Literal

c) Comment

d) Operator

Answer: Variable

Question: A______can be used in a Java program only if it has been declared.

a) Variable

b) Literal

c) Comment

d) Operator

Answer: Variable

Question: One or more variables can be declared in Java using_____statement.

a) Beginning

b) Initial

c) Declaration

d) Comment

Answer: Declaration

Question: In Java, the conventional syntax of_____denote the item to be specified by user.

a) Curly brackets

b) Square brackets

c) Angle brackets

d) Round brackets

Answer: Angle brackets

Question: In Java, the conventional syntax of_____denote the list of items separated by commas.

a) Curly brackets

b) Square brackets

c) Angle brackets

d) Round brackets

Answer: Curly brackets

Question: In syntax: {variable names}, it denote the list of____names.

a) Variable

b) Literal

c) Comment

d) Operator

Answer: Variable

Question: When the list contains more than one item, items should be separated by_____

a) Semi colon

b) Commas

c) Full stop

d) Colon

Answer: Commas

Question: In typical Java syntax, the is to be replaced with the keyword denoting the_____of the variables.

a) Data types

b) Variables

c) Literals

d) Comments

Answer: Data types

Question: ______is used to determine the size of variable, the values it can hold and the operations that can be performed on it.

a) Real numbers

b) Variables

c) Data Types

d) Floats

Answer: Data Types

Question: When the compute executes a variable____statement, it sets aside memory for the variable and associates the variable's name with that memory.

a) Data type

b) Initial

c) Declaration

d) Comment

Answer: Declaration

Question: Which of the following examples of variables is correct ?

a) Int marks;

b) Double amount, interest;

c) Float rate;

d) All of these

Answer: All of these

Question: Which of the following rule is incorrect while defining a variable name ?

a) It must begin with an alphabet, underscore (_)

b) It must begin with a percentage sign (%)

c) No spaces are allowed in variables

d) It cannot be a reserved word

Answer: It must begin with a percentage sign (%)

Question: Which of the following is true ?

a) Java is case-sensitive

b) Java is not case-sensitive

c) Both (A) and (B)

d) None of these

Answer: Java is case-sensitive