1.class Sequence { int[ ] data; int manyItems; int currentIndex; } The Sequence\
ID: 3543394 • Letter: 1
Question
1.class Sequence
{
int[ ] data;
int manyItems;
int currentIndex;
}
The Sequence's constructor creates a new array for data to refer to, but does not place any values in the data array. Why? Answer
B. The array initialization was part of the project that was left to the student.
C. The programmer who uses the Sequence is responsible for initializing the array.
D. When a Sequence is first created, none of the array is being used.
Explanation / Answer
1. At the time of declaring the constructor sequence, a new array for data has been declared but not initialized. So no values are placed in the data array. Hence the correct option is D.
The array can be initialized as a part of the program.
2. The best approach for copying arrays is by using assignment statement c=b. it can also be done by other methods like using a for loop or by using System.arraycopy. Hence the correct option is C.
3. A data type can be considered abstract when the operations are specified but hiding how the operations are implemented. Only the programmer who implements the class for the ADT needs to know about ADT
4. A node will have two parts. One is the data or information part and the other is the address part called as next pointer field which holds the address of the next node. As a and b are integer node variables, a==b implies that they both share the same data and address.
5. The test inputs will include -1000 and 1000 to check whether the number of digits is 4 or not. The test inputs will also include 999, 99, and 9 to check whether the program is outputting the correct output or not.
6. Static methods are implicitly final, because overriding is done based on the type of the object, and static methods are attached to a class, not an object.
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