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Topic: Java-conceptual-questions / Level: Beginner
61. What is synchronization in Java?
62. What is the difference between synchronized block and method?
63. What is the difference between Runnable and Thread class in Java?
64. What is exception propagation in Java?
65. What is NullPointerException in Java?
66. What is OutOfMemoryError in Java?
67. What is an enum in Java?
68. What is the difference between enum and class in Java?
69. What are the different types of control statements in Java?
70. What is the use of break statement in Java?
71. What is the use of continue statement in Java?
72. What is the use of a do-while loop in Java?
73. What is a switch statement in Java?
74. What is a label in Java?
75. What are the uses of a label in loops in Java?
76. What is an infinite loop in Java?
77. What is if-else statement in Java?
78. What is else-if ladder in Java?
79. What is the difference between if-else and switch statement?
80. What is a variable in Java?
81. What are the types of variables in Java?
82. What is the difference between local and global variables in Java?
83. What is a constant in Java?
84. What is the difference between int and Integer in Java?
85. What is autoboxing in Java?
86. What is unboxing in Java?
87. What is type casting in Java?
88. What are primitive data types in Java?
89. What is the difference between primitive and reference data types?
90. What are wrapper classes in Java?
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