Which of the following is a program initially designed to prevent phosphor burn-in on CRT and
plasma computer monitors?
A.
Screensaver
B.
Monitor saver
C.
Debugger
D.
Spider
Explanation:
A screensaver is a program initially designed to prevent phosphor burn-in on CRT and plasma
computer monitors by blanking the screen or filling it with moving images or patterns when the
computer is not in use. Modern screensavers are used primarily for entertainment or security.
Answer option D is incorrect. A spider is an automated program, such as a search engine, indexing
program, or cataloging software. It requests Web pages much faster than human beings can. A
spider is also known as crawler and robot.
Answer option C is incorrect. A debugger is a special application program that is used to find bugs in
other programs. It allows a programmer to stop a program at any point of time and examine and
change the values of the variables. It is the program execution platform that allows the following:
Pausing the program execution at any time
Inspecting the values of the program variables
Modifying the values of the program variables
Calling the methods of the program randomly
The steps in debugging are as follows:
1.Gather data
2.Develop a hypothesis
3.Perform experiments
4.Predict new s
5.Prove or disprove the hypothesis
Answer option B is incorrect. There is no program such as Monitor saver.
Reference:
“http://en.wikipedia.org/wiki/Screensaver”