Which of the following statements is true about ArrayLists in Java?
A. ArrayLists can only store primitive data types.
B. ArrayLists can have duplicate elements.
C. ArrayLists are fixed in size.
D. ArrayLists can only store Strings.
Answer: Option B
A. ArrayLists can only store primitive data types.
B. ArrayLists can have duplicate elements.
C. ArrayLists are fixed in size.
D. ArrayLists can only store Strings.
Answer: Option B
How do you declare a one-dimensional array in Java?
A. int[] myArray;
B. int myArray[];
C. Array
D. All of the above
What is the correct way to initialize a two-dimensional array in Java?
A. int[][] myArray = {{1, 2}, {3, 4}};
B. int[2][2] myArray = {{1, 2}, {3, 4}};
C. int[2][2] myArray; myArray[0][0] = 1; myArray[0][1] = 2; myArray[1][0] = 3; myArray[1][1] = 4;
D. None of the above
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