Flashcards

Quick study sessions to strengthen memory and retain key concepts.

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Java: Choosing the Right Collection

Front

What are the design considerations for using a ConcurrentHashMap?

ConcurrentHashMap is designed for concurrent access. ConcurrentHashMap allows safe concurrent access without locking the entire map, making it…

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Java: Choosing the Right Collection

Front

When to prefer LinkedHashMap over HashMap?

When insertion order needs to be maintained. LinkedHashMap maintains the order of entries based on insertion order, making…

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Flashcard Study

Java: Choosing the Right Collection

Front

What makes HashSet a popular choice for storing unique elements?

HashSet automatically ensures uniqueness. Frame the concept in practical terms so you can explain it during interview discussion.…

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Flashcard Study

Java: Choosing the Right Collection

Front

How do collections affect performance in large-scale systems?

Choice of collection impacts memory and time efficiency. In large-scale systems, picking the wrong collection can lead to…

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Flashcard Study

Java: Choosing the Right Collection

Front

How would you explain the trade-off of using a TreeSet in an interview?

TreeSet maintains order but has slower operations. TreeSet keeps elements sorted but offers slower performance compared to a…

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Flashcard Study

Java: Choosing the Right Collection

Front

Why is List a common choice for ordered collections?

Lists maintain the order of insertion. Frame the concept in practical terms so you can explain it during…

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Flashcard Study

Java: Choosing the Right Collection

Front

Why avoid using Hashtable in new Java code?

Hashtable is synchronized and less efficient compared to modern alternatives like ConcurrentHashMap. Hashtable synchronizes all method calls, which…

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Flashcard Study

Java: Choosing the Right Collection

Front

When might you use a Deque over other collection types?

Deque is ideal for operations at both ends of the collection. Deque supports element insertion and removal at…

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Flashcard Study

Java: Choosing the Right Collection

Front

What are the considerations when implementing a custom Comparator?

Ensure it is consistent with equals and handles nulls if needed. A custom Comparator defines order based on…

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Flashcard Study

Java: Choosing the Right Collection

Front

How does an ArrayList provide indexed access?

ArrayList is backed by an array, allowing fast indexed access. ArrayList stores elements in a dynamic array, providing…

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