Which OSI layer is considered the media access control layer?
A) Transport
B) Application
C) Data Link
D) Presentation
E) None of these answers are correct.
C
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If your index used to access the indexed variables of the array has the value of a non-existent index, this is called _________
Fill in the blank(s) with the appropriate word(s).
Analyze the following code.
``` // Program 1 public class Test { public static void main(String[] args) { Object a1 = new A(); Object a2 = new A(); System.out.println(((A)a1).equals((A)a2)); } } class A { int x; public boolean equals(A a) { return this.x == a.x; } } // Program 2 public class Test { public static void main(String[] args) { A a1 = new A(); A a2 = new A(); System.out.println(a1.equals(a2)); } } class A { int x; public boolean equals(A a) { return this.x == a.x; } }``` a. Program 1 displays true and Program 2 displays true b. Program 1 displays false and Program 2 displays true c. Program 1 displays true and Program 2 displays false d. Program 1 displays false and Program 2 displays false
How can the key and foreign key constraints be enforced by the DBMS? Is the enforcement technique you suggest difficult to implement? Can the constraint checks be executed in an efficient manner when updates are applied to the database?
What will be an ideal response?
The COUNT function only applies to columns with numeric values.
Answer the following statement true (T) or false (F)