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Exit Quiz

Which of these is a mechanism for naming and visibility control of a class and its content?

  • Object
  • Package
  • Interfaces
  • None of the mentioned
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Which keyword is used to declare a constant in Java?

  • const
  • final
  • static
  • constant
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Which method can be defined only once in a program?

  • main method
  • finalize method
  • static method
  • private method
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Which of the following is not a keyword in Java?

  • static
  • Boolean
  • void
  • private
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Which of these statements is incorrect about Thread?

  • start() method is used to begin execution of the thread that is defined by run().
  • run() method ends when execution of the thread ends.
  • A thread can be started by making a call to its start() method.
  • run() method is used to begin execution of a thread before start() method in special cases.
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Which method is the starting point for all Java programs?

  • start()
  • main()
  • init()
  • run()
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Which of the following is not a Java features?

  • Dynamic
  • Architecture Neutral
  • Use of pointers
  • Object-oriented
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Which of these classes are the direct subclasses of the Throwable class?

  • RuntimeException and Error
  • Exception and VirtualMachineError
  • Error and Exception
  • IOException and RuntimeException
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Which of the following is not a Java statement?

  • for
  • while
  • continue
  • return
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What is the default value of an instance variable?

  • null
  • 0
  • depends on the type of variable
  • default values are same as local variables
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Which of the following option leads to the portability and security of Java?

  • Bytecode is executed by JVM
  • The applet makes the Java code secure
  • Use of exception handling
  • Dynamic binding between objects
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Which of these statements is correct about interfaces in Java?

  • An interface can have only abstract methods.
  • An interface can have concrete methods.
  • Interfaces cannot be instantiated.
  • All of the mentioned
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Which of the following is not an access modifier?

  • public
  • protected
  • void
  • private
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What is the return type of the hashCode() method in the Object class?

  • int
  • Object
  • long
  • void
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Which keyword is used for inheritance in Java?

  • inherit
  • extends
  • implements
  • inherits
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Which exception is thrown when java is out of memory?

  • MemoryError
  • OutOfMemoryError
  • MemoryOutOfBoundsException
  • MemoryFullException
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Which method is the entry point for a Java application?

  • main
  • start
  • init
  • run
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Which of these packages contains the exception classes?

  • java.lang
  • java.util
  • java.io
  • java.net
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What is the default value of a local variable?

  • null
  • 0
  • depends on the data type
  • no default value
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Which of these methods is not defined in the Math class?

  • min()
  • max()
  • abs()
  • getExponent()
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Which keyword is used for accessing the features of a package?

  • package
  • import
  • extends
  • implements
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What is the output of: System.out.println(2 + "2");

  • 4
  • 22
  • "4"
  • "22"
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Which of the following is not a type of constructor in Java?

  • Default constructor
  • Parameterized constructor
  • Copy constructor
  • Friend constructor
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Which of these classes are thread-safe in Java?

  • Vector
  • ArrayList
  • LinkedList
  • None of the above
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What is the default value of an instance variable?

  • null
  • 0
  • depends on the data type
  • depends on the class
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Which of the following is used to find and fix bugs in Java programs?

  • JVM
  • JRE
  • JDK
  • JDB
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Which of the following is not an access modifier in Java?

  • protected
  • private
  • public
  • transient
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Which of these classes is not part of Java's collection framework?

  • ArrayList
  • LinkedList
  • HashSet
  • Hashtable
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Which of these methods is used to print an object in Java?

  • print()
  • println()
  • printf()
  • all of the mentioned
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Which of the following is a reserved keyword in Java?

  • object
  • strictfp
  • system
  • main
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