Coding interview preparation

18 Most common used Java List methods 1. add(E element) - Adds the specified element to the end of the list. 2. addAll(Collection<? extends E> c) - Adds all elements of the specified collection to the end of the list. 3. remove(Object o) - Removes the first occurrence of the specified element from the list. 4. remove(int index) - Removes the element at the specified position in the list. 5. get(int index) - Returns the element at the specified position in the list. 6. set(int index, E element) - Replaces the element at the specified position in the list with the specified element. 7. indexOf(Object o) - Returns the index of the first occurrence of the specified element in the list. 8. contains(Object o) - Returns true if the list contains the specified element. 9. size() - Returns the number of elements in the list. 10. isEmpty() - Returns true if the list contains no elements. 11. clear() - Removes all elements from the list. 12. toArray() - Returns an array containing all the elements in the list. 13. subList(int fromIndex, int toIndex) - Returns a view of the portion of the list between the specified fromIndex, inclusive, and toIndex, exclusive. 14. addAll(int index, Collection<? extends E> c) - Inserts all elements of the specified collection into the list, starting at the specified position. 15. iterator() - Returns an iterator over the elements in the list. 16. sort(Comparator<? super E> c) - Sorts the elements of the list according to the specified comparator. 17. replaceAll(UnaryOperator<E> operator) - Replaces each element of the list with the result of applying the given operator. 18. forEach(Consumer<? super E> action) - Performs the given action for each element of the list until all elements have been processed or the action throws an exception.

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Answer: No As we have 2 == operators, so they are executed from left to right. a == b == c ⇒ (a == b) == c ⇒ (10 == 10) == 10 ⇒ true == 10 ⇒ 1 == 10 ⇒ false Why is true converted to 1? The rule for == says if one of the operands is boolean, it's converted to number before the comparison. true is converted to its number value, which is 1.

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Explanation: In JavaScript, the lexical scoping is used just like many other modern languages.This means a function gets executed using the scope chain which was in effect, when they are defined instead of variable scope which was in effect when they are invoked/called.

Explanation: To implement file system, for separate chaining in hash-tables and to implement non-binary trees linked lists are used. Elements are accessed sequentially in linked list. Random access of elements is not an applications of linked list.