❌ A. LinkedHashMap: {B=5, A=2, C=1, E=3, D=4}; TreeMap: {B=5, D=4, E=3, A=2, C=1} ❌ B. LinkedHashMap: {B=5, A=2, C=1, D=4, E=3}; TreeMap: {B=5, A=2, C=1, D=4, E=3} ❌ C. LinkedHashMap: {A=2, B=5, C=1, D=4, E=3}; TreeMap: {C=1, A=2, E=3, D=4, B=5} ✅ D. LinkedHashMap: {A=2, B=5, C=1, D=4, E=3}; TreeMap: {B=5, D=4, E=3, A=2, C=1} ❌ E. Error ❌ F. None of the above
Explanation: 1. LinkedHashMap Behavior: • LinkedHashMap maintains the insertion order of elements. • Here, linkedHashMap will display entries in the exact order they were inserted: {A=2, B=5, C=1, D=4, E=3}.
2. TreeMap with Custom Comparator: • TreeMap typically orders entries based on the natural order of keys, but here it uses a custom comparator to sort entries in descending order based on values from linkedHashMap. • Comparator.comparingInt(linkedHashMap::get).reversed() sorts treeMap by values in descending order, resulting in {B=5, D=4, E=3, A=2, C=1}.
3. Expected Output: • The LinkedHashMap output maintains the insertion order. • The TreeMap output shows entries sorted by values in descending order based on linkedHashMap values.
❌ A. LinkedHashMap: {B=5, A=2, C=1, E=3, D=4}; TreeMap: {B=5, D=4, E=3, A=2, C=1} ❌ B. LinkedHashMap: {B=5, A=2, C=1, D=4, E=3}; TreeMap: {B=5, A=2, C=1, D=4, E=3} ❌ C. LinkedHashMap: {A=2, B=5, C=1, D=4, E=3}; TreeMap: {C=1, A=2, E=3, D=4, B=5} ✅ D. LinkedHashMap: {A=2, B=5, C=1, D=4, E=3}; TreeMap: {B=5, D=4, E=3, A=2, C=1} ❌ E. Error ❌ F. None of the above
Explanation: 1. LinkedHashMap Behavior: • LinkedHashMap maintains the insertion order of elements. • Here, linkedHashMap will display entries in the exact order they were inserted: {A=2, B=5, C=1, D=4, E=3}.
2. TreeMap with Custom Comparator: • TreeMap typically orders entries based on the natural order of keys, but here it uses a custom comparator to sort entries in descending order based on values from linkedHashMap. • Comparator.comparingInt(linkedHashMap::get).reversed() sorts treeMap by values in descending order, resulting in {B=5, D=4, E=3, A=2, C=1}.
3. Expected Output: • The LinkedHashMap output maintains the insertion order. • The TreeMap output shows entries sorted by values in descending order based on linkedHashMap values.
Correct Answer: D
BY Explanations “Top Java Quiz Questions”
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