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Interview Questions and Answers for 'Fidelity information services (fis)' - 4 question(s) found - Order By Newest | ||||
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Ans. Abstraction is a process of hiding the implementation details and describing only the functionality to the user. | ||||
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Ans. ConcurrentMap is an interface and it is a member of the Java Collections Framework. It represents a Map that is capable of handling concurrent access to it without affecting the consistency of entries in a map. ConcurrentMap interface present in java.util.concurrent package. HashMap operations are not synchronized, while Hashtable provides synchronization. Though Hashtable is thread-safe, it is not very efficient. To solve this issue, the Java Collections Framework introduced ConcurrentMap in Java 1.5. | ||||
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Ans. @OneToMany(cascade = CascadeType.ALL) @JoinColumn(name = "student_id") private Set countries; | ||||
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