PRACTICE JAVA
A pointer that is pointing to nothing is called __
a) Void pointer b) Dangling modifier c) Null pointer d) Wild pointer Answer: c) Null pointer
Which interface should be implemented for sorting on the basis of many criteria?
a) Comparator b) Comparable c) Serializable d) None of the above Answer: a) Comparator
Java uses threads to allow following type of environment
a) Symmetric b) Asymmetric c) Synchronous d) Asynchronous Answer: d) Asynchronous
Which of the following are not Java keywords?
a) Double b) Switch c) Then d) Instanceof Answer: c) Then
Which interface restricts duplicate elements?
a) Set b) List c) Map d) All of these Answer: a) Set
The \u0021 article referred to as a
a) Unicode escape sequence b) Octal escape c) Hexadecimal d) Line feed Answer: a) Unicode escape sequence
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