JAVA : Question 1 of 50

The Java source code can be created in a Notepad editor.

2 Mark(s)

TRUE
FALSE

What should be the execution order, if a class has a method, static block, instance block, and constructor, as shown below?

2 Mark(s)

Instance block, method, static block, and constructorInstance block, method, static block, and constructor
Method, constructor, instance block, and static block
Static block, method, instance block, and constructor
Static block, instance block, constructor, and method

Which of the following is not a Java features?

2 Mark(s)

Dynamic
Architecture Neutral
Use of pointers
Object-oriented

Which of the following option leads to the portability and security of Java?

2 Mark(s)

Bytecode is executed by JVMBytecode is executed by JVM
The applet makes the Java code secure and portable
Use of exception handling
Dynamic binding between objects

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

2 Mark(s)

two methods defined in that interface
any methods in a class
only certain methods in that interface
all methods defined in that interface

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

2 Mark(s)

Executable
Simple
High level
Parameterized

What will be the output of the following Java program?

2 Mark(s)

NaN
Infinity
0.0
all of the mentioned

Which environment variable is used to set the java path?

2 Mark(s)

MAVEN_Path
JavaPATH
JAVA
JAVA_HOME

What will be the output of the following Java code?

2 Mark(s)

What is the extension of java code files?

2 Mark(s)

.js
.txt
.class
.java

Which of these cannot be used for a variable name in Java?

2 Mark(s)

identifier & keyword
identifier
keyword
none of the mentioned

What will be the output of the following program?

abstract class MyFirstClass
{
abstract num (int a, int b) { }
}

What will be the output of the following program?

abstract class MyFirstClass
{
abstract num (int a, int b) { }
}

2 Mark(s)

No error
Method is not defined properly
Constructor is not defined properly
Extra parentheses

What is meant by the classes and objects that dependents on each other?

2 Mark(s)

Tight Coupling
Cohesion
Loose Coupling
None of the above

Given,

int values[ ] = {1,2,3,4,5,6,7,8,9,10};
for(int i=0;i< Y; ++i)
System.out.println(values[i]);

Find the value of value[i]?

Given,

int values[ ] = {1,2,3,4,5,6,7,8,9,10};
for(int i=0;i< Y; ++i)
System.out.println(values[i]);

Find the value of value[i]?

2 Mark(s)

10
15
11
None of the above

On successful compilation a file with the class extension is created.

2 Mark(s)

FALSE
TRUE

The Java interpreter is used for the execution of the source code

2 Mark(s)

TRUE
FALSE

What is the default encoding for an OutputStreamWriter?

2 Mark(s)

UTF-8
Default encoding of the host platform
UTF-12
None of the above

In character stream I/O, a single read/write operation performs _____.

2 Mark(s)

Two bytes read/write at a time. .
Eight bytes read/write at a time.
One byte read/write at a time
Five bytes read/ write at a time.

What is the result of the following program?

public static synchronized void main(String[] args) throws
InterruptedException {
Thread f = new Thread();
f.start();
System.out.print("A");
f.wait(1000);
System.out.print("B");
}

What is the result of the following program?

public static synchronized void main(String[] args) throws
InterruptedException {
Thread f = new Thread();
f.start();
System.out.print("A");
f.wait(1000);
System.out.print("B");
}

2 Mark(s)

It prints A and B with a 1000 seconds delay between them
It only prints B and exits
It only prints A and exits
A will be printed, and then an exception is thrown.

Which of the following modifiers can be used for a variable so that it can be accessed by any thread or a part of a program?

2 Mark(s)

global
transient
volatile
default

If a thread goes to sleep

2 Mark(s)

It releases all the locks it has
. It does not release any locks.
It releases half of its locks.
It releases all of its lock except one.

If three threads trying to share a single object at the same time, which condition will arise in this scenario?

2 Mark(s)

Time-Lapse
Critical situation
Race condition
Recursion

How many threads can be executed at a time?

2 Mark(s)

Only one thread
Multiple threads
Only main (main() method) thread
Two threads

Which of the following code segment would execute the stored procedure "getPassword()" located in a database server?

2 Mark(s)

CallableStatement cs = connection.prepareCall("{call.getPassword()}"); cs.executeQuery(); ); );
CallabledStatement callable = conn.prepareCall("{call getPassword()}"); callable.executeUpdate();
CallableStatement cab = con.prepareCall("{call getPassword()}"); cab.executeQuery(
Callablestatement cstate = connect.prepareCall("{call getpassword()}"); cstate.executeQuery(

Which one of the following is not a Java feature?

2 Mark(s)

Object-oriented
Use of pointers
Portable
Dynamic and Extensible

Which component is used to compile, debug and execute the java programs?

2 Mark(s)

The compiled java program can run on an

y ………………… plateform having JavaVirtual Machine (JVM) installed on it.

The compiled java program can run on an

y ………………… plateform having JavaVirtual Machine (JVM) installed on it.

2 Mark(s)

program
java
hardware
non java

The third type of comment is used by a t

ool called ……………… for automaticgeneration of documentation.

The third type of comment is used by a t

ool called ……………… for automaticgeneration of documentation.

2 Mark(s)

Java commenting
Java generator
Java doc
Java loc

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

2 Mark(s)

throws.java.out.IOException
throws.java.in.IOException
throws.java.io.IOException
throws.java.io.InException

. Which exception is thrown when java is out of memory?

2 Mark(s)

MemoryError
OutOfMemoryError
MemoryOutOfBoundsException
MemoryFullException

What is the extension of compiled java classes?

2 Mark(s)

.txt
.js
.class
.java

What will be the output of the following Java code snippet?

2 Mark(s)

The snippet compiles and runs but does not print anything
The snippet compiles, runs and prints 0
The snippet compiles, runs and prints 1
The snippet does not compile

What will be the output of the following Java program?

2 Mark(s)

1 2 3 4 5
1 2 3 4
1 2
1 2 3

What is Truncation in Java?

2 Mark(s)

Floating-point value assigned to a Floating type
Floating-point value assigned to an integer type
Integer value assigned to floating type
Integer value assigned to floating type

What will be the output of the following Java code?

2 Mark(s)

What will be the output of the following Java program?

2 Mark(s)

0 256
0 64
256 0
64 0

Ingres is a ……………………

2 Mark(s)

Socket
Compiler
Database
Web server

…………………… of

a remotely accessible object must implement …………….

…………………… of

a remotely accessible object must implement …………….

2 Mark(s)

all methods, RemoteException
class, RemoteException
class, RemoteInterface
all methods, RemoteInterface

………………….is the key to ……………………

2 Mark(s)

Serialization, persistence
Persistence, inheritance
Inheritance, object
Persistence, serialization

Which statement is true about Java?

2 Mark(s)

Java is a sequence-dependent programming language
Java is a code dependent programming language
Java is a platform-dependent programming language
Java is a platform-independent programming language

Who invented Java Programming?

2 Mark(s)

Guido van Rossum
James Gosling
Dennis Ritchie
Bjarne Stroustrup

Data input is

2 Mark(s)

an abstract class defined in java.io
a class we can use to read primitive data types
an interface that defines methods to open files.
an interface that defines methods to read primitive data type

Which of the following do not represent legal flow control statements?

2 Mark(s)

break
return
exit ()
continue outer;

In java

, …………. can only test

for equal

ity, whereas ………… can evaluate any type of

the Boolean expression.

In java

, …………. can only test

for equal

ity, whereas ………… can evaluate any type of

the Boolean expression.

2 Mark(s)

switch, if
if, switch
if, break
continue, if

The concept of multiple inheritance is implemented in Java by

2 Mark(s)

extending two or more classes
extending one class and implementing one or more interfaces
implementing two or more interfaces
both B and C

Which of the following control expressions are valid for an if statement?

2 Mark(s)

An integer expression
A Boolean expression
Either A or B
Neither A nor B

A package is a collection of

2 Mark(s)

classes
interfaces
editing tools
classes and interfaces

The ……………… and ……………….. classes are abstract classes that support reading

and writing of byte streams.

The ……………… and ……………….. classes are abstract classes that support reading

and writing of byte streams.

2 Mark(s)

reader, writer
inputstream, outputstream
objectinputstream, objectoutputstream
none

The class at the top of exception class hierarchy is ……………………..

2 Mark(s)

ArithmeticException
Throwable
Class
Exception

Which of the following is a type of polymorphism in Java Programming?

2 Mark(s)

Multiple polymorphism
Compile time polymorphism
Multilevel polymorphism
Execution time polymorphism