Deck 4: Java Exception Handling and Inputoutput Operations

Question 1

Which exception is thrown by read() method?

A)IOException
B)InterruptedException
C)SystemException
D)SystemInputException

Answer 1

IOException

Question 2

Which is the super class of all exception classes

A)Exception
B)Object
C)Error
D)Throwable

Answer 2

Throwable

Question 3

Which class is the super class of all classes of the java.lang package?

A)Object
B)System
C)Super
D)Class

Answer 3

Object

Question 4

Which of the following exception is raised when a number is divided by zero

A)NumberFormatException
B)ArithmeticException
C)NullPointerException
D)IllegalArgumentException

Question 5

A single try block must be followed by which of these?

A)finally
B)catch
C)catch or finally
D)None of the mentioned

Question 6

Which of these exceptions will occur if we try to access the index of an array beyond its length?

A)ArithmeticException
B)ArrayException
C)ArrayIndexException
D)ArrayIndexOutOfBoundsException

Question 7

Runnable is a

A)Class
B)Method
C)Variable
D)Interface

Question 8

Thread priority in Java is represented as?

A)int
B)Float
C)double
D)long

Question 9

Which of these class is used to make a thread?

A)String
B)System
C)Thread
D)Runnable

Question 10

Which of these interface is implemented to create a Thread?

A)Runnable
B)Connections
C)Set
D)MapConnections

Question 11

Which of these method of Thread class is used to find out the priority given to a thread?

A)get()
B)ThreadPriority()
C)getPriority()
D)getThreadPriority()

Question 12

Which of this method of Thread class is used to change the state of a thread to blocked state?

A)sleep()
B)terminate()
C)stop()
D)block()

Question 13

Which method in Thread class is used to check weather a thread is still running?

A)isAlive()
B)Join()
C)isRunning()
D)Alive()

Question 14

Which of these methods is used to begin the execution of a thread?

A)run()
B)start()
C)runThread()
D)startThread()

Question 15

Which of these method waits for the thread to treminate?

A)sleep()
B)isAlive()
C)join()
D)stop()

Question 16

Which of these is used to read a string from the input stream?

A)get()
B)getLine()
C)read()
D)readLine()

Question 17

Which of these classes is used to read characters and strings in Java from console?

A)BufferedReader
B)StringReader
C)BufferedStreamReader
D)InputStreamReader

Question 18

Which of these classes are used by Byte streams for input operation?

A)InputStream
B)InputOutputStream
C)Reader
D)All of the mentioned

Question 19

Which of these class contains the methods print() & println()?

A)System
B)System.out
C)BufferedOutputStream
D)PrintStream

Question 20

Which of these methods can be used to write console output?

A)printout()
B)println()
C)write()
D)All of the mentioned

Question 21

Which of these classes are used by character streams output operations?

A)OutputStream
B)Writer
C)ReadStream
D)InputOutputStream

Question 22

Which refers to a channel through which data flow from the source to the destination:

A)String
B)Character
C)Stream
D)Buffer

Question 23

Java Stream classes can be categorized into two groups:

A)Byte and Character Stream Classes
B)Stream and String Classes
C)String and Character Stream Classes
D)Buffer and Character Stream Classes

Question 24

Byte Stream Classes support input/output operations on _____

A)8 bit
B)16 bit
C)32 bit
D)64 bit

Question 25

Character Stream Classes support input/output operations on _______ characters:

A)8 bit Unicode
B)16 bit Unicode
C)32 bit Unicode
D)64 bit Unicode