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(comp101)[2005](s)midterm1~masze^_10095.pdf
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For questions 1 to 17, please use the pencil to fill in the circle on the answer sheet that represents the best answer (4 points for each question).

1. The computer is often more effective than humans to solve problems that
A. require a lot of innovations.
B. have a large number of repetitive steps.
C. do not have a known solution method.
D. all of the above.



2. The GB2312 code for simplified Chinese characters uses two bytes to encode each character, with the first bit of each byte set to one. How many unique characters can the GB code represent?
A. 64 64 = 4,096
B. 128 128 = 16,384
C. 256 256 = 65,536
D. 512 512 = 262,144



3. When the electric power to the computer is suddenly shut off, which device below will keep the data intact until power is resumed?
A. CPU
B. ALU
C. RAM
D. EPROM



4. A certain flash disk claims to have 1 GB capacity. How many bytes of data can it store?
A. 1,048,576
B. 10,097,152
C. 100,194,304
D. 1,073,741,824





5. Windows XP is

A. a device driver
B. an operating system
C. a computer application
D. a graphical user interface

6. It is possible to listen to music on the hard disk while modifying an Excel worksheet because the computer you use supports
A. multi-tasking.
B. multiple independent devices.
C. multi-processing.
D. multiple independent applications.



7. When you run out of space on the disk, it is possible to make more space available by running a utility program to
A. change Chinese files in traditional characters into simplified characters.
B. scan the disk to repair damaged tracks or sectors.
C. defragment the disk to make better use of the space available.
D. remove drivers of devices that are no longer connected to the computer.



8. The LAN is normally set up to
A. allow e-mail communication.
B. allow better sharing of computer resources.
C. allow better connection to the Internet.
D. all of the above.








9. Which of the following can be used to link a LAN to a WAN?
A. browser
B. router
C. driver
D. splitter


10. To find the IP address of a certain computer on the Internet, such as www.ust.hk, one can launch the cmd window and type
A. ls www.ust.hk
B. ping www.ust.hk
C. ipconfig www.ust.hk
D. findip www.ust.hk



11. The protocol used to retrieve e-mail from a mail server is
A. SMTP
B. NNTP
C. TCP
D. IMAP



12. Which of the following keys should be used to decrypt a message received using PKI?
A. The senders public key
B. The senders private key
C. The recipients public key
D. The recipients private key



13. Which technology advance has the most impact on the continued reduction over the years of cost of a computer?
A. The large-scale integration of computer circuits.
B. The concept of stored-program computers.
C. The convenience of using e-mails for communic