500 Java Objective Questions and Answer 300 Core java interview questions

51. What is meant by JVM ?

52. What is a compilation unit ?

53. What is meant by identifiers ?

54. What are the different types of modifiers ?

55. What are the access modifiers in Java ?

56. What are the primitive data types in Java ?

57. What is meant by a wrapper class ?

58. What is meant by static variable and static method ?

59. What is meant by Garbage collection ?

60. What is meant by abstract class

61. What is meant by final class, methods and variables ?

62. What is meant by interface ?

63. What is meant by a resource leak ?

64. What is the difference between interface and abstract class ?

65. What is the difference between public private, protected and static?

66. What is meant by method overloading ?

67. What is meant by method overriding ?

68. What is singleton class ?

69. What is the difference between an array and a vector ?

70. What is meant by constructor ?

71. What is meant by casting ?

72. What is the difference between final, finally and finalize ?

73. What is meant by packages ?

74. What are all the packages ?

75. Name 2 calsses you have used ?

76. Name 2 classes that can store arbitrary number of objects ?

77. What is the difference between java.applet.* and java.applet.Applet ?

78. What is a default package ?

79. What is meant by a super class and how can you call a super class ?

80. What is anonymous class ?

81. Name interfaces without a method ?

82. What is the use of an interface ?

83. What is a serializable interface ?

84. How to prevent field from serialization ?

85. What is meant by exception ?

86. How can you avoid the runtime exception ?

87. What is the difference between throw and throws ?

88. What is the use of finally ?

89. Can multiple catch statements be used in exceptions ?

90. Is it possible to write a try within a try statement ?

91. What is the method to find if the object exited or not ?

92. What is meant by a Thread ?

93. What is meant by multi-threading ?

94. What is the 2 way of creating a thread ? Which is the best way and why?

95. What is the method to find if a thread is active or not ?

96. What are the thread-to-thread communication ?

97. What is the difference between sleep and suspend ?

98. Can thread become a member of another thread ?

99. What is meant by deadlock ?

100. How can you avoid a deadlock ?

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  500 Java Objective Questions and Answer

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