Which of these methods deletes all the elements from invoking collection?

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Question:
Which of these methods deletes all the elements from invoking collection?

1.delete()

2.refresh()

3.reset()

4.clear()

Posted Date:-2021-10-25 05:26:59

More MCQS Questions and answers

  1. What is Collection in Java?
  2. Which exception is thrown by read() method?
  3. Which of the following statement is correct?
  4. Which of these class can be used to implement input stream that uses a character array as the source?
  5. Which of these class contains the methods print() & println()?
  6. Which of these class is implemented by FilterInputStream class?
  7. Which of these class is not a member class of java.io package?
  8. Which of these class is not related to input and output stream in terms of functioning?
  9. Which of these class is used to create an object whose character sequence is mutable?
  10. Which of these class is used to read and write bytes in a file?
  11. Which of these class is used to read characters and strings in Java from console?
  12. Which of these class is used to read characters in a file?
  13. Which of these class is used to read from byte array?
  14. Which of these classes are used by Byte streams for input and output operation?
  15. Which of these classes are used by Byte streams for input and output operation?
  16. Which of these classes are used by character streams for input and output operations?
  17. Which of these classes are used by character streams output operations?
  18. Which of these classes can return more than one character to be returned to input stream?
  19. Which of these classes is not part of Java's collection framework?
  20. Which of these classes is used for input and output operation when working with bytes?
  21. Which of these data type is returned by every method of OutputStream?
  22. Which of these interface declares core method that all collections will have?
  23. Which of these interface handle sequences?
  24. Which of these interface is not a member of java.io package?
  25. Which of these interface is not a part of Java's collection framework?
  26. Which of these interface is not a part of Java's collection framework?
  27. Which of these interface must contain a unique element?
  28. Which of these is a method to clear all the data present in output buffers?
  29. Which of these is a method to clear all the data present in output buffers?
  30. Which of these is a type of stream in Java?
  31. Which of these is an incorrect form of using method max() to obtain maximum element?
  32. Which of these is Basic interface that all other interface inherits?
  33. Which of these is method for testing whether the specified element is a file or a directory?
  34. Which of these is method is used for writing bytes to an outputstream?
  35. Which of these is specified by a File object?
  36. Which of these is static variable defined in Collections?
  37. Which of these is true about unmodifiableCollection() method?
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  39. Which of these is used to read a string from the input stream?
  40. Which of these method of class StringBuffer is used to reverse sequence of characters?
  41. Which of these method of FileReader class is used to read characters from a file?
  42. Which of these method of InputStream is used to read integer representation of next available byte input?
  43. Which of these methods can be used to writing console output?
  44. Which of these methods can convert an object into a List?
  45. Which of these methods can randomize all elements in a list?
  46. Which of these methods deletes all the elements from invoking collection?
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