What exception type does the following program throw?
```
public class Test {
public static void main(String[] args) {
Object o = null;
System.out.println(o);
}
}
```
a. ArithmeticException
b. ArrayIndexOutOfBoundsException
c. StringIndexOutOfBoundsException
d. No exception
e. NullPointerException
d. No exception
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You are starting a new website. You want to quickly allow users to begin using your site without having the hassle of creating a new user account. You set up a one-way trust federated access link from your website to the three major social networks. Why should you use a one-way trust in this configuration rather than a two-way trust in this scenario?
A. A one-way trust allows your website to trust the user accounts of the social networks without requiring the social networks to trust your website. B. Two-way trusts are only valid in private networks and cannot be used across the Internet. C. A one-way trust allows your website to access the file storage of the social networks. D. A two-way trust would grant the social network administrators full access to your backend database.
Which of the following represents the efficiency of the insertion sort?
a. O(1) b. O(n) c. O(n2) d. None of the above.