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WorksheetsComputer Science Worksheet
Total questions: 83
Worksheet time: 44mins
An EXOR gate performs which of the following operations?
Outputs HIGH when the inputs are different
Outputs HIGH when the inputs are the same
Outputs LOW for all input combinations
Outputs HIGH only when all inputs are HIGH
_____ is free software, but it has been donated for public use and has no copyright restrictions.
Freeware
Packaged software
Shareware
Public-domain software
Dead code is _____
the program instructions that have been converted to machine language
the program instructions that will be converted to machine language
any program instructions that a program never executes
any program instructions that a program executes
A program is _____
a.a collection of unprocessed text, numbers, images, audio, and video
b.a series of instructions that tells a computer what to do and how to do it
c.an instruction issued by replying to a question that is displayed
d.an instruction that causes a single specific action to be performed
Common types of flash memory cards include _____
all of the above
xD Picture Card
CompactFlash (CF) and Smart Media
Secure Digital (SD) and Memory Stick
This Binary number 111000111 can be presented as _____ in Octal numeral system.
107C
1C7
707
455
_____ is a program placed on a computer without the user’s knowledge or consent that secretly collects information about the user, sometimes relating to Web browsing habits.
Spam
A pop-up ad
A filter
Spyware
Choose the correct HTML element to define important text
During a cold boot on a personal computer, the POST (power-on self test) results are compared with data in a ____ chip.
UNIX
CMOS
scsi
BIOS
Installing a program is the process of setting up the program to work with the computer, mobile device, printer, and/or other hardware.
True
False
Application software is : ___
Programs that control or maintain the operations of the computer and its devices ((System software))
Programs allow the user to perform maintenance-type tasks usually related to managing a computer, its devices or its programs (Utility software)
Programs designed to make users more productive.
Examples of HTML are to bold text, to indicate a new paragraph, and to display a horizontal rule across the page. Select one:
events
tags
bugs
controls
The average hard disk access time is at least faster than the average floppy disk drive.
none of the above
tentimes faster
three times faster
seven times faster
Convert the binary number 1001001010 to a hexadecimal number.
248
258
25A
24a
Instead of port, the term _ sometimes is used to identify audio and video connectors.
hub
jack
bay
bus
Give the relationship that represents the dual of the Boolean property A +1 = 1? (Note: * = AND, + = OR and = NOT)
A*'A
A*0=0
A+0=0
A*'1=1
______ includes programs such as word processing, spreadsheet, database, presentation graphics, personal information manager software, PDA
Business software
Communications software
Software for home, personal, and educational use
Graphics and multimedia software
Once programmers develop the solution algorithm using a program flowchart or pseudocode, they should ___, or check, the program design for accuracy.
validate (xac thuc)
authenticate (xac thuc, nhung la xac thuc danh tinh)
Consolidate ((hop nhat) la viec ket hop hoac thong nhat cac yeu to)
encapsulate ((dong goi) la khai niem trong lap trinh huong doi tuong, dung de goi gon du lieu va phuong thuc lai voi nhau)
Such as those shown on the keyboard in the accompanying figure, are special keys programmed to issue commands to a computer.
Function keys
Toggle keys
Numeric keys
Computers include:
Iphone
All-in-one
Tablet
Server
Laptop
Give the best definition of a literal? Select one:
The actual understanding of a Boolean variable
The complement of a Boolean variable
A Boolean variable interpreted literally
The programs within a software suite (for personal use) use a _____.
different interface but share some common features
similar interface and share some common features
similar interface but have completely different features
different interface and have completely different features
The _____ step of the programming development cycle consists of three major tasks: (1) review the requirements, (2) meet with the systems analysts and users, and (3) identify input, output, processing, and data components.
Design Solution
Analyze Requirements
Implement Solution
Test Solution
A digital camera’s actual photographed resolution is known as the _____.
optical resolution
visual resolution
enhanced resolution
standard resolution
The Speed Class Rating, for instance: class 6, is the official unit of speed measurement for (a) Cards.
Convert the decimal number 261 to a number base 16
108
106
107
105
With a _____, users interact with menus and visual images such as icons, buttons, and other objects to issue commands.
menu-driven interface
command-line interface
performance-monitor interface
graphical user interface (GUI)
Choose the correct HTML element for the largest heading: Select one:
The "lap" in laptop computer comes from (a) .
Select the correct answer:
Act of wrapping around
Overlap
Front part from the waist to the knees of a seated person
Non of all above
The COM port (short for communications port) on the system unit is one type of _____
SCSI port
USB port
serial port
parallel port
An equivalent representation for the Boolean expression A' + 1 is
A
1
0
A'
An advantage of an interpreter is that _____
interpreted programs run faster than compiled programs
all of the above
when it finds errors, it displays feedback immediately
an interpreter produces an object program
Generally, the mouse is used to move the pointer on the screen to an object such as a button, and then users _____ to perform a certain action on that object.
press a mouse button
move the mouse side to side
What is the correct HTML for inserting an image?
What does connecting together the inputs of NAND and NOR gates do?
Produce and EXNOR gate
Produce a NOT gate
Damage the gate
Help produce multi-input gates
Bell Labs licensed _____ for a low fee to numerous colleges and universities, where the operating system obtained a wide following.
Linux
Windows XP
DOX
UNIX
HTML comments start with
True
False
A __________ is an electronic device, operating under the control of instructions stored in its own memory.
computer
machine
camera
mouse
Networks allow computers to share resources, such as _____
all of the above
softwave
software
data
How do you make an AND gate out of an OR gate using inverters (NOT gates)?
Invert the output from the OR gate
Invert one of the inputs to the OR gate
Invert both the inputs and output of the OR gate
Invert both the inputs to the OR gate
A feature of word processing software called _____ allows users to type words in a paragraph continually without pressing the ENTER key at the end of each line.
collaboration
wordwrap
search
replace
A(n) _____, also called program logic, is a graphical or written description of the step-by-step procedures to solve the problem.
style sheet
object model
solution algorithm
source code
A command is _____
an instruction issued by replying to a question that is displayed
a collection of unprocessed text, numbers, images, audio, and video
an instruction that causes a single specific action to be performed
a series of instructions that tells a computer what to do and how to do it
250 GB hard disk, CD or DVD drive, USB flash drive are some recommended storage devices for _____.
SOHO users
Mobile users
Power users
Home users
This Binary number 11100011 can be presented as _____ in Decimal numeral system.
123
1C7
2C8
227
An _____ is any hardware component that conveys information from a computer or mobile device to one or more people.
output device
input device
Computers process _____. Select one:
data into instructions
data into information
information into data
instructions into data
_____ is a cache separate from the processor chip on the motherboard.
L4 cache
L1 cache
L2 cache
L3 cache
How do you make an AND gate out of an OR gate using inverters (NOT gates)? Select one:
Invert one of the inputs to the OR gate
Invert the output from the OR gate
Invert both the inputs to the OR gate
Invert both the inputs and output of the OR gate
A _____ is a special window that provides information, presents available options, or requests a response.
dialog box
shortcut menu
submenu
command box
Widely used object-oriented languages that the industry recognizes as standards include all of the following except _____. Select one:
C#
COBOL
C++
Java
External fingerprint scanners usually plug into a _____ port.
serial or SCSI
serial or MIDI
parallel or USB
parallel or IrDA
A (a) overcomes the major disadvantage of CD-R disks, which is being able to write on them only once.
The decimal number 723 is equivalent to ____ in Quinary (base-5) system.
13124
12321
21231
10343
Windows XP includes the diagnostic utility, __, which diagnoses problems as well as suggests courses of action.
Dr. Watson
Windows Picture and Fax Viewer
DriveSpace
Windows Explorer
One USBportcan ___?
connect up to 32 peripheral devices
connect up to 64 peripheral devices
connect up to 255 peripheral devices
connect up to 127 peripheral devices
How do you make a NOR gate out of an NAND gate using inverters (NOT gates)? Select one
Invert both the inputs and output of the NAND gate
Invert both the inputs to the NAND gate
Invert the output from the NAND gate
Invert one of the inputs to the NAND gate
What is the correct HTML for making a checkbox?
Manufacturers often use ____ to represent a digital camera's resolution.
points per inch (PPI)
pixels per screen (PPS)
pixels per inch (PPI)
points per screen (PPS)
To start up, a computer locates ____. Select one:
application software in memory and loads it onto storage
application software in storage and loads it into memory
an operating system in memory and loads it onto storage
an operating system in storage and loads it into memory
A computer keeps data, instructions, and information on _.
CPU
storage device
storage media
memory
Software usually includes a variety of online services. For example, computer users can track investments and do online banking.
Education
Government
Health care
Finance
The decimal number 723 is equivalent to ____ in Ternary (base-3) system.
212001
220210
231101
222210
A typical CD-ROM holds from 650 MB to 1 GB of data, instructions, and information, which is equivalent to about __ high-density 3.5-inch floppy disks.
450
4500
4.5
45
Many programs use _____ or a similar language as their macro programming language. Select one:
Wireless Markup Language (WML)
Visual Basic for Applications (VBA)
Report Program Generator (RPG)
Programming Language One (PL/I)
A template is a _____.
small image on the screen that represents a program or document
sequence of keystrokes and instructions that a user records and saves
document that contains the formatting necessary for a specific document type
collection of drawings, diagrams, and photographs that can be inserted into a document
What does an EXOR gate do?
Give a high output when only one of its inputs are high
Give a low output when one or more of its inputs are high
Give allow output when only one of its inputs are high
Synchronous DRAM (SDRAM) chips are faster than DRAM chips because they ___.
are synchronized to the system clock
transfer data twice for each clock cycle
do not have to be re-energized as often
use pipelining techniques
On a network, the major difference between the server and client computers is that the server ordinarily has ____.
less power, less storage space, but expanded communication capabilities
more power, more storage space, but decreased communication capabilities
more power, more storage space, and expanded communication capabilities
less power, less storage space, and decreased communication capabilities
A pointing device includes: Select one or more:
screen
monitor
touchpad
keyboard
mouse
Installing a program is the process of setting up the program to work with the computer, mobile device, printer, and/or other hardware.
True
False
All of the following are advantages of using computers except _____. Select one:
the consistency
the communications
the impact on labor force
the speed
The USB (universal serial bus) and FireWire bus are _____.
a bus designed to improve the speed with which 3-D graphics and video transmit
the most common and slowest expansion bus
a high-speed expansion bus that connects higher speed devices
a bus that eliminates the need to install cards into expansion slots
An equivalent representation for the Boolean expression A' + 1 is
A
A'
0
1
A file is _____. Select one:
an on-screen work area that has a graphical user interface
a horizontal space that contains a window’s title
a named collection of stored data, instructions, or information
an instruction that causes a program to perform a specific action
The quality of a scanner is measured by the number of bits it stores in a pixel and the number of pixels per inch; the higher each number the _____ the scanner. Select one
better the quality, but the more expensive
poorer the quality, and the less expensive
poorer the quality, but the more expensive
better the quality, and the less expensive
Convert the hexadecimal number A3C5 to binary number:
1010 0011 1100 0101
1110 0011 1100 1010
1110 0011 1100 0101
1010 0010 0011 1010
A _____ is an icon on the desktop that provides a user with immediate access to a program or file
shortcut
kernel
buffer
spooler
What does HTML stand for? Select one:
Hyperlinks and Text Markup Language
Home Tool Markup Language
Hyper Text Markup Language
The _____ combines the features of the traditional notebook computer with the simplicity of pencil and paper.
Tablet PC
desktop computer
Memory stores _____. Select one:
the data being processed and the resulting information
application programs that carry out a specific task
the operating system and other system software
all of the above
