127. What is casting? There are two types of casting, casting between primitive numeric types and casting between object references. Casting between numeric types is used to convert larger values, …
121. Which class is the immediate superclass of the Container class? Component. 122. If a method is declared as protected, where may the method be accessed? A protected method may …
115. What is the purpose of the File class? The File class is used to create objects that provide access to the files and directories of a local file system.
109. How are the elements of a GridBagLayout organized? The elements of a GridBagLayout are organized according to a grid. However, the elements are of different sizes and may occupy …
103. What restrictions are placed on the values of each case of a switch statement? During compilation, the values of each case of a switch statement must evaluate to a …
97. Is &&= a valid Java operator? No. It is not a valid java operator. 98. Name the eight primitive Java types. The eight primitive types are byte, char, short, …
91. What is the Map interface? The Map interface replaces the JDK 1.1 Dictionary class and is used associate keys with values.
85. How is rounding performed under integer division? The fractional part of the result is truncated. This is known as rounding toward zero.
79. When can an object reference be cast to an interface reference? An object reference be cast to an interface reference when the object implements the referenced interface.
61. What method is invoked to cause an object to begin executing as a separate thread? The start() method of the Thread class is invoked to cause an object to …
