Tag: Interview Q&A
Difference between final, finally, and finalize in Java
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Criteria final finally finalize Category Modifier Block Method Usage Used with classes to prevent inheritance. Used with methods to prevent...
Read MoreDifference between Array and ArrayList in Java
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Criteria Array ArrayList Size Fixed. The size of an array is set upon initialization and cannot be changed. Dynamic. The...
Read MoreDifference between String and StringBuffer in Java
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Criteria String StringBuffer Immutability Immutable: Once a String object is created, its content cannot be altered. Mutable: The content can...
Read MoreDifference between String and StringBuilder in Java
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Criteria String StringBuilder Immutability Immutable: Once a String object is created, its content cannot be changed. Mutable: The content can...
Read MoreDifference Between Iterable and Collection in Java
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Criteria Iterable Collection Package java.lang java.util Primary Purpose To provide a mechanism to iterate over a sequence of elements. Represents...
Read MoreDifference Between NavigableSet and SortedSet in Java
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The main difference is SortedSet offers basic operations in a sorted order, while NavigableSet provides more advanced navigational operations.
Read MoreDifference Between NavigableMap and SortedMap in Java
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Criteria NavigableMap SortedMap Interface Hierarchy NavigableMap extends SortedMap. SortedMap is a subinterface of Map. Ordering Guarantees key ordering, like SortedMap....
Read MoreDifference Between EnumMap and HashMap in Java
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Criteria EnumMap HashMap Key Type Only accepts keys of a single enum type. Can accept any object as a key....
Read MoreDifference Between EnumSet and HashSet in Java
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Criteria EnumSet HashSet Element Type Only stores elements of a single enum type. Can store any objects. Performance Typically faster...
Read MoreDifference Between TreeMap and LinkedHashMap in Java
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Criteria TreeMap LinkedHashMap Ordering Sorted according to the natural ordering of its keys, or by a comparator provided at map...
Read MoreDifference Between SynchronizedMap and ConcurrentHashMap in Java
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Criteria SynchronizedMap ConcurrentHashMap Thread Safety Thread-safe. Every individual operation (like get, put) is synchronized. Thread-safe. Allows concurrent read and write...
Read MoreDifference Between CopyOnWriteArraySet and HashSet in Java
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Criteria CopyOnWriteArraySet HashSet Thread Safety Thread-safe. All mutative operations (add, remove, etc.) are implemented by making a fresh copy of...
Read MoreDifference Between CopyOnWriteArrayList and ArrayList in Java
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Criteria CopyOnWriteArrayList ArrayList Thread Safety Thread-safe. All mutative operations (add, set, remove, etc.) are implemented by making a fresh copy...
Read MoreDifference Between IdentityHashMap and HashMap in Java
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Criteria IdentityHashMap HashMap Key Comparison Uses reference equality (==) for comparing keys Uses equals() method for comparing keys Use-case Used...
Read MoreDifference Between WeakHashMap and HashMap in Java
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Criteria WeakHashMap HashMap Key Storage Uses weak references for keys Uses strong references for keys Garbage Collection When the key...
Read MoreDifference Between TreeSet and LinkedHashSet in Java
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Let’s first discuss the key points about TreeSet and LinkedHashSet in Java: Underlying Data Structure: Ordering: Performance: Null Elements: Iterators:...
Read MoreDifference Between PriorityQueue and LinkedList in Java
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Here are the key points about PriorityQueue and LinkedList in Java: Purpose & Underlying Structure: Ordering: Performance: Null Elements: Usage...
Read MoreDifference Between ConcurrentHashMap and HashMap in Java
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Here are the key points about ConcurrentHashMap and HashMap in Java: Concurrency: Performance: Null Keys and Values: Iterators: Internal Structure:...
Read MoreDifference Between ArrayList and Vector in Java
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Here are the key points highlighting the differences between ArrayList and Vector in Java: Synchronization: Performance: Capacity Increment: Legacy: Flexibility:...
Read MoreDifference Between LinkedHashSet and HashSet in Java
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Here are the key points about LinkedHashSet and HashSet in Java: Underlying Data Structure: LinkedHashSet: Backed by both a hash...
Read MoreDifference Between ArrayDeque and LinkedList in Java
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Choosing between ArrayDeque and LinkedList depends on the specific needs of your application, especially concerning performance, memory overhead, and the...
Read MoreDifference Between HashTable and HashMap in Java
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Choosing between HashTable and HashMap largely depends on the specific needs of the application, especially regarding thread safety and performance...
Read MoreDifference Between HashMap and TreeMap in Java
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In Java, we have HashMap and TreeMap classes to store and organize data (key-value pairs). Both do similar jobs but...
Read MoreDifference Between HashSet and TreeSet in Java
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Java's Collections Framework offers a rich set of data structures designed to store, retrieve, and manipulate data efficiently. Two standout...
Read MoreDifference Between ArrayList and LinkedList in Java
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Within the expansive Java Collections Framework, the List interface finds its two most popular implementations in the form of ArrayList...
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