Answer Posted / priya

paraanthesis are never needed for postfix expression

Which collection class is thread safe?

894

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How helpful is abstract data type of data structures?

919

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“int a[] = new int[3]{1, 2, 3}” – This a legal way of defining the arrays?

1256

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What is difference between arraylist and linkedlist?

1090

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Does array sort mutate?

865

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Define the queue data structure.

1124

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Does treemap allow null key?

905

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Which is more efficient merge sort vs quicksort?

912

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How does sort function work?

927

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What is inserting in data structure?

1014

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What do you know about traversal in linked lists?

973

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Is array a data structure?

1069

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Why is hashset used?

1028

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Why do we need sorting algorithms?

974

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When is a binary search algorithm best applied?

1177

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