R4RIN – MCQs, Mock Tests | Java Java Multiple Choice Questions.

Java programs are

1. Faster than others
2. Platform independent
3. Not reusable
4. Not scalable

✅ Correct Answer: 2

Java has its origin in

1. C programming language
2. PERRL
3. COBOL
4. Oak programming language

✅ Correct Answer: 4

Which one of the following is true for Java

1. Java is object-oriented and interpreted
2. Java is efficient and faster than C
3. Java is the choice of everyone.
4. Java is not robust.

✅ Correct Answer: 1

The command javac is used to

1. debug a java program
2. compile a java program
3. interpret a java program
4. execute a java program

✅ Correct Answer: 2

Java servlets are an efficient and powerful solution for creating ………….. for the web. D)

1. Dynamic content
2. Static content
3. Hardware
4. Both a and b

✅ Correct Answer: 1

Filters were officially introduced in the Servlet ……………… specification.

1. 2.1
2. 2.3
3. 2.2
4. 2.4

✅ Correct Answer: 2

Which is the root class of all AWT events

1. java.awt.ActionEvent
2. java.awt.AWTEvent
3. java.awt.event.AWTEvent
4. java.awt.event.Event

✅ Correct Answer: 2

OOP features are i) Increasing productivity ii) Reusability iii) Decreasing maintenance cost iv) High vulnerability

1. 1,2 & 4
2. 1,2 & 3
3. 1, 2 & 4
4. None of the above

✅ Correct Answer: 2

break statement is used to i) get out of method ii) end a program iii) get out of a loop iv) get out of the system

1. 1 & 2
2. 1,2 & 3
3. 1 & 3
4. 3

✅ Correct Answer: 4

Native-protocol pure Java converts ……….. into the ………… used by DBMSs directly.

1. JDBC calls, network protocol
2. ODBC class, network protocol
3. ODBC class, user call
4. JDBC calls, user call

✅ Correct Answer: 1

All Java classes are derived from

1. java.lang.Class
2. java.util.Name
3. java.lang.Object
4. java.awt.Window

✅ Correct Answer: 3

The jdb is used to

1. Create a jar archive
2. Debug a java program
3. Create a C header file
4. Generate java documentation

✅ Correct Answer: 2

What would happen if “String[]args” is not included as an argument in the main method?

1. No error
2. Compilation error
3. The program won’t run
4. Program exit

✅ Correct Answer: 3

For the execution of DELETE SQL query in JDBC, …………. method must be used.

1. executeQuery()
2. executeDeleteQuery()
3. executeUpdate()
4. executeDelete()

✅ Correct Answer: 3

Which method will a web browser call on a new applet?

1. main method
2. destroy method
3. execute method
4. init method

✅ Correct Answer: 4

Which of the following is not mandatory in a variable declaration?

1. a semicolon
2. an identifier
3. an assignment
4. a data type

✅ Correct Answer: 3

When a programming class implements an interface, it must provide behavior for

1. two methods defined in that interface
2. any methods in a class
3. only certain methods in that interface
4. all methods defined in that interface

✅ Correct Answer: 4

In order to run JSP ……………….. is required.

1. Mail Server
2. Applet viewer
3. Java Web Server
4. Database connection

✅ Correct Answer: 3

State true or false. i) AWT is an extended version of swing ii) Paint( ) of Applet class cannot be overridden

1. i-false, ii-false B)C)
2. i-false,ii-true
3. i-true, ii-false
4. i-true, ii-true

✅ Correct Answer: 1

Prepared Statement object in JDBC used to execute……….. queries.

1. Executable
2. Simple
3. High level
4. Parameterized

✅ Correct Answer: 4

In Java variables, if first increment of the variable takes place and then the assignment occurs. This operation is also called…………………………

1. pre-increment
2. post-increment
3. incrementation
4. pre incrementation

✅ Correct Answer: 1

When the operators are having the same priority, they are evaluated from …………….. …………. in the order they appear in the expression.

1. right to left
2. left to right
3. any of the order
4. depends on the compiler

✅ Correct Answer: 2

In Java, …………. can only test for equality, whereas ………… can evaluate any type of Boolean expression.

1. switch, if
2. if, switch
3. if, break
4. continue, if

✅ Correct Answer: 1

The ………………….. looks only for a match between the value of the expression and one of its case constants.

1. if
2. match
3. switch
4. None of the above

✅ Correct Answer: 3

System.in.read() is being used, the program must specify the ……………… clause.

1. throws.java.out.IOException
2. throws.java.in.IOException
3. throws.java.io.IOException
4. throws.java.io.InException

✅ Correct Answer: 3

By using ………………. you can force immediate termination of a loop, bypassing the conditional expression and any remaining code in the body of the loop.

1. Break
2. Continue
3. Terminate
4. Loop Close

✅ Correct Answer: 1

The out object is an object encapsulated inside the …………….. class and represents the standard output device.

1. standard
2. local
3. global
4. system

✅ Correct Answer: 3

The third type of comment is used by a tool called ……………… for automatic generation of documentation.

1. Java commenting
2. Java generator
3. Java doc
4. Java loc

✅ Correct Answer: 3

In the second type, the information written in java after // is ignored by the …………………..

1. Interpreter
2. Compiler
3. Programmer
4. All of the above

✅ Correct Answer: 2

The compiled Java program can run on any ………………… platform having Java Virtual Machine (JVM) installed on it. A) program B) java C) hardware D) nonjava

1. program
2. java
3. hardware
4. nonjava

✅ Correct Answer: 3

JSP embeds in ……………. in ………………….

1. Servlet, HTML
2. HTML, Java
3. HTML, Servlet
4. Java, HTML

✅ Correct Answer: 4

State true or false. i) init() is called after start() in applet ii) applets are used for networking iii) inheritance is a part of Java Foundation Classes iv) final does not prevent inheritance

1. i-true, ii-true, iii-false, iv-true
2. i-false, ii-false, iii-false, iv-false
3. i-true, ii-true, iii-true, iv-true
4. i-true, ii-false, iii-false, iv-false

✅ Correct Answer: 2