Which of the following file modes opens a file in the read state for updating?
A. r+b
B. rb
C. u+b
D. ub
E. ab
Answer: A
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Analyze the following code:
``` public class Test { public static void main(String[] args) { String s = new String("Welcome to Java"); Object o = s; String d = (String)o; } } ``` a. When assigning s to o in Object o = s, a new object is created. b. When casting o to s in String d = (String)o, a new object is created. c. When casting o to s in String d = (String)o, the contents of o is changed. d. s, o, and d reference the same String object.
Most updates can be accomplished over the Internet by downloading a program that can make changes
Indicate whether the statement is true or false
How should you clean modern pointing devices such as an optical mouse?
What will be an ideal response?
Hackers often set up ________ in areas such as airports where users are expecting to find a free, wireless access point.
A. Trojan horses B. nodes C. botnets D. rogue hotspots