Q 1.

which datatype is involved in byte, int, and literal numbers is promoted to which of these?

int long byte float

Q 2.

What is BigDecimal.ONE?

wrong statement custom defined statement static variable with the value 1 on scale 10 static variable with the value 1 on scale 0

Q 3.

What is Truncation is Java?

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

Q 4.

Which method returns the elements of Enum class?

getEnums() getEnumConstants() getEnumList() getEnum()

Q 5.

Which of these is long data type literal?

Ox99fffL ABCDEFG Ox99fffa 99671246

Q 6.

which of these can be an arithmetic operator?

numeric constant character numeric & character

Q 7.

Modulus operator % can be applied to which of the following?

integers floating-point both a & b none of the above

Q 8.

Which of these statements are incorrect?

The assignment operators can be efficiently implemented by Java run-time system than their equivalent long forms it run faster than their equivalent long forms Assignment operators can be used only by numeric and character data type None of the above

Q 9.

Which of these is specified by a File object?

a file in disk directory path directory in disk none of the mentioned

Q 10.

Which of these are the method for testing whether the specified element is a file or a directory?

 IsFile()  isFile()  Isfile()  isfile()

Q 11.

Which of these is an incorrect statement?

String object is immutable and cannot be changed String object can point to some other reference in String variable StringBuffer class is used for storing string in buffer for latter use  None

Q 12.

Which method can be used to convert all characters in a String into a character array?

charAt() both getChars() & charAt() both toCharArray0 & getChars() all of the mentioned

Q 13.

 When do we determine method overloading?

At run time At compile time  At coding time At execution time

Q 14.

When does overloading occur?

More than one method with same name but different method and different number of parameters More than one method with same name, but different number of arguments More than one method with same name, same number of parameters but different type more than one method with same name, different type and arguments

Q 15.

How classpath file can be read?

 InputStream in = this.getClass().getResource("SomeTextFile.txt"); InputStream in = this.getClass().getResourceClasspath("SomeTextFile.txt"); InputStream in = this.getClass().getResourceAsStream("SomeTextFile.txt"); InputStream in = this.getClass().getResource("classpath:/SomeTextFile.txt");

Q 16.

Which of the following is a correct constructor for thread?

Thread(Runnable a, String str) Thread(int priority) Thread(Runnable a, int priority) Thread(Runnable a, ThreadGroup t)

Q 17.

Which of these packages contains all the classes and methods required for even handling in Java?

 java.applet java.awt java.event java.awt.event

Q 18.

 Which of these methods are used to register a mouse motion listener?

 addMouse() addMouseListener() addMouseMotionListner() eventMouseMotionListener()

Q 19.

Which keyword is used by calling function to handle exception thrown by called function?

throws throw try catch

Q 20.

what can be called as the process of writing the state of n object to a byte stream?

Serialization Externalization File Filtering All of the mentioned