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Java is a ........... language.

1. moderate typed
2. strogly typed
3. weakly typed
4. none of these

✅ Correct Answer: 2

How many primitive data types are there in Java?

1. 5
2. 6
3. 7
4. 8

✅ Correct Answer: 4

In Java byte, short, int and long all of these are

1. signed
2. unsigned
3. Both of the above
4. None of these

✅ Correct Answer: 1

Size of int in Java is

1. 8 bit
2. 16 bit
3. 32 bit
4. 64 bit

✅ Correct Answer: 3

The smallest integer type is ......... and its size is ......... bits.

1. short, 8
2. byte, 8
3. short, 16
4. short, 16

✅ Correct Answer: 2

Size of float and double in Java is

1. 32 and 64
2. 64 and 64
3. 32 and 32
4. 64 and 32

✅ Correct Answer: 1

Automatic type conversion in Java takes place when

1. Two type are compatible and size of destination type is equal of source type.
2. Two type are compatible and size of destination type is larger than source type.
3. Two type are compatible and size of destination type is shorter than source type.
4. All of the above

✅ Correct Answer: 2

Which of the following automatic type conversion will be possible?

1. byte to int
2. short to int
3. long to int
4. int to long

✅ Correct Answer: 4

The following fraction of code double STATIC = 2.5 ; System.out.println( STATIC );

1. Prints 2.5
2. Raises an exception
3. Raises an error as STATIC is used as a variable which is a keyword
4. None of these

✅ Correct Answer: 1

The following program: public class Test{ static boolean is OK; public static void main(String args[]){System.out.print(is OK); } }

1. Prints true
2. Prints false
3. Will not compile as boolean is not initialized
4. Will not compile as boolean can never be static

✅ Correct Answer: 2

�In Java, the word true is ................

1. A Boolean literal
2. A Java keyword
3. Same as value 0
4. Same as value 1

✅ Correct Answer: 1

What will the output of the following program? public class Test{ public static void main(String args[]){float f = (1 / 4) * 10; int i = Math.round(f); System.out.println(i); } }

1. 0
2. 1
3. 2
4. 3

✅ Correct Answer: 1

�What is the output for the below code ? public class Test{public static void main(String[] args){int i = 010; int j = 07;System.out.println(i); System.out.println(j); } }

1. 7 8
2. 8 7
3. 9 8
4. None

✅ Correct Answer: 2

�What will be output of following program? public class Test{public static void main(String[] args){byte b=127; b++; b++; System.out.println(b); } }

1. 127
2. -127
3. 129
4. -129

✅ Correct Answer: 2

�Which class cannot be subclassed (or extended) in java?

1. Final class
2. abstract class
3. parent class
4. None of above

✅ Correct Answer: 1

Why we use array as a parameter of main method

1. Can store multiple values
2. It is syntax
3. Both of above
4. None of above

✅ Correct Answer: 1

Suspend thread can be revived by using

1. yield() method
2. Suspend() method
3. start() method
4. resume() method

✅ Correct Answer: 4

Runnable is

1. Interface
2. Class
3. Variable
4. Method

✅ Correct Answer: 1

Which collection class associates values witch keys, and orders the keys according to their natural order

1. java.util.LinkedList
2. java.util.TreeMap
3. java.util.SortedSet
4. java.util.HashSet

✅ Correct Answer: 2

Which method is used to perform DML statements in JDBC

1. executeUpdate()
2. executeQuery()
3. execute()
4. None of above

✅ Correct Answer: 1

Which of the following below are valid isolation levels in J2EE

1. TRANSACTION_READ_UNCOMMITTED
2. TRANSACTION_SERIALIZABLE
3. Only A
4. Both A and B

✅ Correct Answer: 4

Which metrhods are utilized to control the access to an object in multi threaded programming

1. Synchronized methods
2. Asynchronized methods
3. Serialized methods
4. None of above

✅ Correct Answer: 1

Program which executes applet is known as

1. JVM
2. virtual machine
3. applet engine
4. None of above

✅ Correct Answer: 3

Which statement is static and synchronized in JDBC API

1. getConnection()
2. executeQuery()
3. prepareCall()
4. executeUpdate()

✅ Correct Answer: 1

The JDBC-ODBC bridge is

1. Singlethreaded
2. Multithreaded
3. Both of above
4. None of above

✅ Correct Answer: 2

All raw data types should be read and uploaded to the database as an array of

1. int
2. byte
3. char
4. bollean

✅ Correct Answer: 2

The class java.sql.Timestamp is associated with

1. java.util.Date
2. java.util.Time
3. java.sql.Time
4. None of above

✅ Correct Answer: 1

Which of the following statements about arrays is syntactically wrong

1. arrayName[] p = new arrayName[5];
2. arrayName p[][] = new arrayName[2][];
3. arrayName[] p [];
4. arrayName p[5];

✅ Correct Answer: 4

Converting a primitive type data into its corresponding wrapper class object instance is called

1. boxing
2. wrapping
3. autoboxing
4. instantiation

✅ Correct Answer: 3

Package of drawstring() method is

1. java.awt
2. javax.swing
3. java.applet
4. java.io

✅ Correct Answer: 1

Which method executes only once

1. stop() method
2. start() method
3. init() method
4. destroy() method

✅ Correct Answer: 3

Object which can store group of other objects is called

1. Package
2. Wrapper
3. Java object
4. Collection object

✅ Correct Answer: 4

All collection classes are available in

1. java.util package
2. java.io package
3. java.lang package
4. java.awt package

✅ Correct Answer: 1

Thread class is available in

1. java.lang package
2. java.util package
3. java.awt package
4. java.io package

✅ Correct Answer: 1

Minimum threads in a program are

1. 0
2. 1
3. 2
4. 3

✅ Correct Answer: 2

JIT meaning

1. just in time
2. java in time
3. join in time
4. none of above

✅ Correct Answer: 1

After the compilation of the java source code, which file is created by the JVM

1. .class
2. .doc
3. .java
4. .cdr

✅ Correct Answer: 1

pow () is associated with which class

1. Input stream class
2. Object class
3. Math class
4. None of above

✅ Correct Answer: 3

x=x+1 is equivalent to

1. x++
2. ++x
3. x=x-1
4. None of these

✅ Correct Answer: 1

If method have same name as class name and method don't have any return type then it is known as

1. Constructor
2. Destructors
3. Variable
4. Object

✅ Correct Answer: 1

Methods that have same name, but different Parameter list and different definition known as

1. Overriding
2. Overloading
3. Constructor
4. none of these

✅ Correct Answer: 2

Inheritance means

1. Sub class create object of super class
2. Sub class extends Base class
3. Sub class extends super class
4. All of the above

✅ Correct Answer: 3

Which type of inheritance is not supported by java

1. Single
2. Mulilevel
3. Hirarchical
4. Multiple

✅ Correct Answer: 4

String is the predefined

1. Object
2. Variable
3. Class
4. Method

✅ Correct Answer: 3

Super is the predefined

1. Method
2. Keyword
3. Keyword and Method
4. None of above

✅ Correct Answer: 3

Execution of the program is always begins with

1. Main method
2. parent class
3. default package
4. class contain main method

✅ Correct Answer: 1

In java, gc() method is available in which package

1. java.io package
2. java.lang package
3. java.awt package
4. java.util package

✅ Correct Answer: 2

JAR file contains the compressed version of

1. .java file
2. .jsp file
3. .class file
4. None of above

✅ Correct Answer: 3

Process of creating exact copy of the existing object is called

1. overloading
2. overriding
3. cloning
4. coping

✅ Correct Answer: 3

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