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What is the extension of compiled Java classes?

  • .js
  • .txt
  • .class
  • .java
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Which of these methods is a part of the Thread class?

  • run()
  • start()
  • stop()
  • All of the above
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Which of these can be used to create an object in Java?

  • new
  • malloc
  • alloc
  • create
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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 operators is used to allocate memory to an array variable in Java?

  • malloc
  • alloc
  • new
  • new malloc
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Which keyword is used for accessing the features of a package?

  • pkg
  • import
  • package
  • importpackage
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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 of the following is a reserved keyword in Java?

  • object
  • strictfp
  • system
  • main
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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 keyword is used to create a new object?

  • malloc
  • alloc
  • new
  • create
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Which method is used to schedule a thread for execution?

  • run()
  • start()
  • resume()
  • yield()
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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 the following is not a keyword in Java?

  • static
  • Boolean
  • void
  • private
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Which of the following is a valid long literal?

  • 0xnf024L
  • ABH8097
  • L990023
  • 904423
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Which of these methods is used to read a string from the input stream?

  • get()
  • getLine()
  • read()
  • readLine()
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What does the expression 1.0 / 0.0 evaluate to in Java?

  • 0
  • NaN
  • Infinity
  • Runtime Exception
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Which of the following is not an OOP concept in Java?

  • Polymorphism
  • Inheritance
  • Compilation
  • Encapsulation
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Which method is the entry point for a Java application?

  • main
  • start
  • init
  • run
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Which of the following is not an access modifier in Java?

  • protected
  • private
  • public
  • transient
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What is the size of a byte variable in Java?

  • 8 bits
  • 16 bits
  • 32 bits
  • 64 bits
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Which of these keywords is used to define interfaces in Java?

  • interface
  • Interface
  • intf
  • Intf
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Which method of the class String is used to obtain length of String object?

  • get()
  • Sizeof()
  • lengthof()
  • length()
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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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What is the use of the "instanceof" keyword?

  • Compare two objects
  • Check if object is of a particular class
  • Typecast object
  • None of the mentioned
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Which of the following is used to handle an exception in Java?

  • catch
  • throw
  • catch and throw
  • try and catch
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Which of these is returned by the operator '&'?

  • Character
  • Integer
  • Boolean
  • Float
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Which of the following is not a Java statement?

  • for
  • while
  • continue
  • return
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Which method is the starting point for all Java programs?

  • start()
  • main()
  • init()
  • run()
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Which method must be implemented by all threads?

  • run()
  • start()
  • stop()
  • main()
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What is the default value of a boolean variable in Java?

  • TRUE
  • FALSE
  • 0
  • 1
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