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Which of the following is used to create an array in Java?

  • new
  • create
  • array
  • instance
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Which of these methods is used to find the length of a string in Java?

  • length()
  • size()
  • getLength()
  • getSize()
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Which of the following is a reserved keyword in Java?

  • array
  • goto
  • null
  • constant
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Which of the following is true about Java?

  • Java is platform-independent
  • Java is a procedural language
  • Java does not support multithreading
  • Java is not object-oriented
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Which of the following statements is true about Java?

  • Java is a platform-independent language
  • Java is a procedural language
  • Java is a pure object-oriented language
  • Java supports both procedural and object-oriented programming
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Which of the following is not a valid method of the HashSet class in Java?

  • add()
  • remove()
  • size()
  • length()
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Which of these classes is a part of Java's Collections framework?

  • Stack
  • ArrayList
  • HashSet
  • All of the above
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Which of the following is used to handle exceptions in Java?

  • try-catch
  • throw
  • throws
  • All of the above
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Which of the following is not a state of a thread?

  • New
  • Runnable
  • Blocked
  • Running
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In Java, what is the correct syntax to output "Hello World"?

  • System.out.println("Hello World");
  • print("Hello World");
  • echo("Hello World");
  • Console.WriteLine("Hello World");
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Which method is used to start a thread in Java?

  • run()
  • start()
  • begin()
  • init()
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Which of the following is not a wrapper class in Java?

  • Integer
  • Double
  • Character
  • int
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Which keyword is used to inherit a class in Java?

  • extends
  • implements
  • inherits
  • super
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What is the use of the 'final' keyword in Java?

  • To define constants
  • To prevent method overriding
  • To prevent inheritance
  • All of the above
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Which of the following is used to create an interface in Java?

  • interface
  • class
  • implements
  • extends
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Which of the following is not a valid method of the Math class in Java?

  • abs()
  • ceil()
  • floor()
  • round()
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Which keyword is used for accessing the features of a package?

  • package
  • import
  • extends
  • implements
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Which class is used to read characters from a file?

  • FileReader
  • BufferedReader
  • FileInputStream
  • FileWriter
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Which of the following is used to create an object in Java?

  • new
  • create
  • object
  • instance
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Which method is used to perform some action when an object is to be destroyed?

  • finalize()
  • delete()
  • remove()
  • destructor()
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Which of the following is used to create a static method in Java?

  • static
  • method
  • function
  • procedure
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What is the default encoding for an InputStreamReader?

  • UTF-8
  • ASCII
  • ISO-8859-1
  • UTF-16
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Which of the following is not a type of constructor?

  • Default constructor
  • No-argument constructor
  • Parameterized constructor
  • Copy constructor
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Which of the following is a marker interface?

  • Serializable
  • Cloneable
  • Remote
  • All of the above
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Which of the following is used to create a synchronized block in Java?

  • synchronized
  • sync
  • lock
  • thread
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Which of the following is used to create a final class in Java?

  • final
  • class
  • interface
  • extends
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Which of the following is used to create a native method in Java?

  • native
  • method
  • function
  • procedure
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Which of the following is a marker interface?

  • Serializable
  • Cloneable
  • Remote
  • All of the above
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Which is not a valid way to declare an array in Java?

  • int arr[] = new int[5];
  • int arr[] = {1, 2, 3, 4, 5};
  • int arr[];
  • int arr[5] = new int[];
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Which of these is not a valid component of the Android architecture?

  • Intent
  • Activity
  • Services
  • Action
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