ECS 15 Introduction to Computers
Instructor: Liu
Name:
Student ID #:
Midterm Exam: Oct. 31, 2014
Duration: 50 Minutes
1. The exam is closed book. However, you may refer to one sheet of A4
paper (double sided) of your own notes.
2. No calculator, no cellphone, no laptop, no electronic device.
3. There are three problems in total.
4. The total is 100 points.
Good Luck!
Question
Points
1 (20)
2 (54)
Do not write in this box.
3 (26)
Total (100)
1. True or False (2 points each).
1) Disk fragmentation occurs when files can no longer be written in
contiguous clusters on the hard disk. TRUE
2) ALU uses circuits to execute instructions. TRUE
3) There are about a million of different instructions a typical PC can
perform. FALSE
4) It is not safe to place a large magnet next to a hard drive. TRUE
5) Hexadecimal number 11 is larger than decimal number 11. TRUE
6) A CD can contain a larger amount of data than a DVD. FALSE
7) A hard drive using RAID 1 is more reliable than not using it. TRUE
8)
The components and parts of the computer hardware are referred to as
programs. FALSE
9) One byte can hold 256 different values. TRUE
10) Python is an example of machine language. FALSE
2. Multiple choices with one correct answer (3 points each).
1) Which represents the largest set of characters? UNICODE
a. ASCII
b. BIOS
c. Unicode
d. VLSI
2) The part of the CPU that does mathematical processing is called the
_________.ALU
a. Control unit
b. ALU
c. Microprocessor
d. VLSI
3) Which of the following is considered one of the most important technology
advances that enables the mass production of microprocessor? IC Design
a. Developing Vista
b. IC design
c. BIOS
d. RAM
4) What action would be best to completely destroy private information from a hard
disk? FORMAT
a. Put all files in the Trash/Recycle bin and empty it
b. Delete the file
c. Do a full format of the disk
d. Defragment the disk
5) In modern computers, there are ______ transistors in a single die. D
a. A few thousands
b. A few hundreds of thousands
c. A few millions
d. A few hundreds of millions
6) The binary representation of 33 is: A
a. 100001.
b. 101011.
c. 100000.
d. 100010.
7) Which binary number is the number right AFTER the binary number 1011? A
a. 1100
b. 1010
c. 1011
d. 1011
8) From the highest to the lowest capacity (size), which order is correct? B
a. Cache, hard drive, memory
b. Cache, memory, hard drive
c. Hard drive, memory, Cache
d. Hard drive, cache, memory
9) Which of the following are not in the boot process? B
a. Memory test
b. Load MS Office
c. POST
d. Load operating system
10) 1GiB is
a.
b.
c.
d.
B
2^40 Bytes
2^30 Bytes
2^23 bits
8 * 2^40 bits
11) Which of the following is an open-source operating system? D
a. Mainframe
b. MAC OS
c. Windows XP
d. Linux
12) Which of the following are not on a CPU? D
a. Register
b. Control unit
c. ALU
d. RAM
13) A typical hard drive in today’s desktop has the following storage space C
a. 1MB
b. 1GB
c. 1TB
d. 1KB
14) As opposed to the analog counterpart, which of the following is NOT true about a
digital recording? D
a. Can be reproduced without loss
b. Can be edited
c. Can be shared in the Internet
d. Can be identical to the original analog counterpart
15) Which of the following is not an output device? A
a. Keyboard
b. Printer
c. Haptic devices
d. Monitor
16) A computer program that allows the operating system to communicate with a
device is called a: D
A.
Communicator
B.
Enabler
C.
Device pilot
D.
Driver
17) Which one of the following format is the most popular for photography?:B
a. MP3
b. JPEG
c. PNG
d. GIF
18) The following command is mostly likely an example of ___? B
ADD 40, 60, 2040
a.
b.
c.
d.
Python command
Assembly language
Machine language
None of the above.
3. Short questions (26 points).
1) (6 points)Name three major functionalities of a modern operating system.
One example is process management. (2 points each)
Memory Management
Managing Disk and File System
Managing Input and Output
2) (4 points) Name two operating systems on mobile devices. (2 points each)
Android
iOS
Windows Phone 8
3) (6 points) How large is a one-minute telephony-quality sound file? The
sample rate is 8000Hz and each sample is saved using 8 bits. Telephonyquality sound is mono (not stereo). Write down the equation.
8000*8*60 (bits)
4) (6 points) The computer freezes. Name two possible reasons and one
possible action (2 points each).
Reason
1. Computer thrashing.
2. Crashing of an Application.
Action:
Restart the Computer
5) (4 points) Connect the corresponding actions with outcomes.
CTRL +C (or Command +C)
(Copy)
Switch between open programs
Tab (move to next box)
Windows program, copy
ALT +Tab (or Command +Tab)
(Switch Between Open Programs)
Highlight a word
Double click
(Highlight a Word)
Web, move to next box