Java | JSP | JSF Answers

To read objects from a file, we use the class _________________ .
A) InputObjectStream
B) ObjectInputStream
C) ObjectStream
D) ObjectInput

When processing all the elements of row i of a two-dimensional array named grades using a for loop with variable j, what is the condition of the for loop? _________________ .
A) j < length
B) j < grades.length
C) j <= grades.length
D) j < grades[i].length
E) j <= grades[i].length

To access the number of rows in a two-dimensional array named grades, we use _________________
A) grades
B) grades[i].length
C) grades.size
D) grades.length()
E) grades.length

If we use a component (i.e., call methods of that component) before instantiating it, then we will generate a ________________ at runtime.

13. When processing all the elements of a column of a two-dimensional array, what possible runtime error do we have do worry about that the number of column elements may not be constant across all rows.

17. The interface concept is Java's way of implementing ___________ inheritance.

26. Since the readObject method returns a generic object, what must we do with the returned object?

34. In order for the window to be displayed, we must make a call to the method _____

35. In order to add component to a JFrame, we use the _____ method

37. If we use a component (i.e., call methods of that component) before instantiating it, then we will generate a ________________ at runtime.