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Code d'Examen: JK0-U31
Nom d'Examen: CompTIA (CompTIA E2C Strata IT Technology Exam)
Questions et réponses: 276 Q&As
Code d'Examen: IK0-002
Nom d'Examen: CompTIA (I-NET+ CERTIFICATION)
Questions et réponses: 221 Q&As
Code d'Examen: MB0-001
Nom d'Examen: CompTIA (CompTIA Mobility+ Certification Exam)
Questions et réponses: 287 Q&As
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NO.1 Which of the following terms refers to an anti-virus software file that is updated from time to
time to protect a computer from new viruses?
A. Definition
B. Modules
C. Service pack
D. Hotfix
Answer: A
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Explanation:
Definition is an anti-virus software file that should be updated at regular intervals to protect a
computer from new viruses. This file is also known as virus definition file. The virus definition file
contains information
about the latest viruses, which helps identify new viruses and protect computers from them.
Answer option D is incorrect. Hotfix is a collection of files used by Microsoft for software updates
that are released between major service pack releases. A hotfix is about a problem, occurring under
specific circumstances, which cannot wait to be fixed till the next service pack release. Hotfixes are
generally
related to security problems. Hence, it is essential to fix these problems as soon as possible. Answer
option C is incorrect. A service pack is a collection of Fixes and Patches in a single product. A service
pack can be used to handle a large number of viruses and bugs or to update an operating system
with advanced and better capabilities. A service pack usually contains a number of file replacements.
Answer option B is incorrect. This term does not refer to any anti-virus software file.
Reference: "http.//en.wikipedia.org/wiki/Computer_virus"
NO.2 Which of the following devices is used for accessing the data on Secure Digital (SD)
card, MMC card, and CompactFlash (CF)?
A. E-book reader
B. Memory card reader
C. Smart card reader
D. Barcode reader
Answer: B
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Explanation:
A memory card reader is a device, typically having a USB interface, for accessing the data on a
memory card such as a CompactFlash (CF), Secure Digital (SD) or MultiMediaCard (MMC). Answer
option C is incorrect. Smart card readers are used to read smart cards. It is used as a
communications medium between the smart card and a host. Answer option D is
incorrect. A barcode reader (or barcode scanner) is an electronic device for reading printed
barcodes. Answer option A is incorrect. There is no such device as e-book reader.
NO.3 Which of the following can be used to accomplish authentication? Each correct answer
represents a complete solution. Choose all that apply.
A. Biometrics
B. Encryption
C. Password
D. Token
Answer: A,C,D
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Explanation:
The following can be used to accomplish authentication.
1.Password
2.Biometrics
3.Token A password is a secret word or string of characters that is used for authentication, to prove
identity, or gain access to a resource. What is authentication? Authentication is a process of
verifying the identity of a person, network host, or system process. The authentication process
compares the provided credentials with the credentials stored in the database of an authentication
server. What is biometrics?Biometrics is a method of authentication that uses physical
characteristics, such as fingerprints, scars, retinal patterns, and other forms of biophysical qualities
to identify a user. Nowadays, the usage of biometric devices such as hand scanners and retinal
scanners is becoming more common in the business environment. A token may be a physical device
or software token that an authorized user of computer services is given to ease authentication.
Answer option B is incorrect. Encryption can be used to accomplish security and not authentication.
NO.4 Which of the following transmits all ATSC HDTV standards and supports 8-channel digital audio?
A. DVI
B. S-Video
C. SVGA
D. HDMI
Answer: D
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Explanation:
HDMI stands for High-Definition Multimedia Interface. It is a standard, uncompressed, and all-digital
audio/video interface. HDMI is capable of delivering the highest quality digital video and multi-
channel digital audio on a single cable. It provides an interface between any audio/video sources,
such as a DVD player or a computer and a digital television (DTV) or video monitor. HDMI transmits
all ATSC HDTV standards and supports 8-channel digital audio, with extra bandwidth to
accommodate future enhancements. HDMI has two types of connectors. Type A and Type B.
Type A and Type B connectors use 19 pins and 29 pins, respectively. The Type B connector is
designed for very high-resolution displays that are expected in near future. Answer option B is
incorrect. S-Video, also known as Y/C video, stands for Super-Video. It is a technology for video
transmission. Using this technology, the video is transmitted into two separate signals.
One is used for color, and the other for brightness. Sometimes S-Video signals are considered as a
type of component video signal. However, its quality is inferior to other complex component video
schemes such as RGB. This technology produces sharper images than those produced by composite
video, which carries the entire set of signals in a single line. For using S- Video, the device sending
the signal must support S-Video output and the device receiving the signal needs to have an
S-Video input jack. Answer option A is incorrect. DVI stands for Digital Visual Interface. It is a
standard for high speed, high resolution digital display invented by Digital Display Working Group
(DDWG). DVI accommodates analog and digital interfaces with a single connector. New video cards
have DVI as well as VGA ports built into them. Most of LCD monitors come with a 15-pin VGA
connection cable, even if they are capable of handling digital signals coming from DVI connections.
However, some monitors come with both types of cables. DVI has three main categories of
connectors. They are. DVI-A, DVI-D, and DVI-I. DVI-A is an analog-only
connector, DVI-D is a digital-only connector, and DVI-I is an analog/digital connector. DVI-D and DVI-I
connectors are of two types. single link and dual link. DVI supports UXGA and HDTV with a single set
of links. Higher resolutions such as 1920 x 1080, 2048 x 1536, or more can be supported with dual
links. Answer option C is incorrect. A VGA or SVGA connector is a 15-pin, three rows, female
connector, on the back of a PC used for connecting monitors. Reference:
"http.//en.wikipedia.org/wiki/High-Definition_Multimedia_Interface"
NO.5 You are handling IT support for a sales company. One of the sales representatives complains
that his laptop does not have a network card. You wish to add one via an expansion slot. What type
of expansion card should you use?
A. MCA
B. PCMCIA
C. PCI
D. AGP
Answer: B
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Explanation:
PCMCIA is a widely used expansion card slot for laptops. What is PCMCIA card? Personal Computer
Memory Card International Association (PCMCIA) card is also known as PC card. The PC card uses a
small expansion slot and is primarily used in laptops. However, PC cards are also available in some of
the desktop computers. There are three types of PCMCIA cards. 1.Type I 2.Type II 3.Type III Answer
option C is incorrect. PCI slots are used in PC's, not laptops. Answer option D is incorrect. AGP is a
legacy
graphics slot for PC's. What is AGP (Accelerated Graphics Port)? AGP is a high speed 32-bit bus
designed for high performance graphics and video support. It allows a video card to have direct
access to a computer's RAM, which enables fast video performance. AGP provides a bandwidth of
up to 2,133 MB/second. Answer option A is incorrect. MCA is a legacy PC slot.
Reference:
http.//www.wisegeek.com/what-is-an-expansion-card.htm
NO.6 What is the maximum cable length to connect a device to an IEEE 1394a port?
A. 12 meters
B. 10 meters
C. 4.5 meters
D. 5 meters
Answer: C
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Explanation:
The maximum cable length to connect a device to an IEEE 1394a port is 4.5 meters. What is IEEE
1394? Institute of Electrical and Electronics Engineers (IEEE) 1394 is a standard for high-speed serial
bus that provides enhanced PC connectivity for a wide range of devices. These devices include
consumer audiovisual components, traditional PC storage devices, and handheld devices. IEEE 1394
is also known as Fire wire. Answer option D is incorrect. The maximum cable length to connect a
device to USB
1.1 and USB 2.0 ports is 5 meters. What is USB? Universal Serial Bus (USB) is a high speed bus
standard developed by Compaq, IBM, DEC, Intel, Microsoft, NEC, and Northern Telecom. It provides
the Plug and Play capability of Windows to external hardware devices. USB supports hot plugging,
which means that a USB device can be installed or removed while the computer is running. A single
USB port can be used to connect up to 127 peripheral devices, such as CD-ROM drives, tape drives,
keyboards, scanners etc. USB 1.1 has a maximum data transfer rate of 12 Mbps, whereas USB 2.0
has a maximum data transfer rate of 480 Mbps. USB 2.0 is fully backward compatible with USB 1.1.
NO.7 Which of the following is an international standard for energy efficient consumer products?
A. Energy Star rating
B. Standby mode
C. Trusted Computer System Evaluation Criteria (TCSEC)
D. Advanced Configuration and Power Interface (ACPI)
Answer: A
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Explanation:
Energy Star rating is an international standard for energy efficient consumer products. The Energy
Star rating is an international standard for energy efficient consumer products. Devices carrying
the Energy Star logo are products, such as computer devices, peripherals, kitchen appliances, etc.
These products generally use 20% to 30% lesser energy than required by the federal standards. The
Energy Star program was created by the 'United
States Environmental Protection Agency' (US EPA) as an attempt to reduce energy consumption and
greenhouse gas emission by power plants. The program has helped in spreading the use of LED
traffic lights, efficient fluorescent lighting, and power management systems for office equipments.
Answer option C is incorrect. Trusted Computer System Evaluation Criteria (TCSEC), frequently
referred to as the Orange Book, is the centerpiece of the DoD Rainbow Series publications. It is a
United States Government Department of Defense (DoD) standard that sets basic requirements for
assessing the effectiveness of computer security controls built into a computer system. TCSEC was
used to evaluate, classify and select computer systems being considered for the processing, storage
and retrieval of sensitive or classified information.
It was replaced with the development of the Common Criteria international standard originally
published in 2005. Answer option B is incorrect. The standby mode is a power saving feature for
computers. In this mode, a computer does not shut down completely. The computer goes to low
power state and, as a result, it consumes less power. When the computer resumes from the standby
mode, full power is restored to its devices. During the standby mode, if the power supply is
disconnected or interrupted, data might be lost. The standby mode is available automatically on
ACPI-enabled or APM-enabled computers. Users do not need to enable this mode manually. This
mode is not available in non-ACPI and non-APM based computers. Answer option D is incorrect. The
Advanced Configuration and Power Interface (ACPI) is a power- management specification
developed by Intel, Microsoft, and Toshiba. It enables an operating system to control the amount of
power supplied to each device attached to a computer by turning off peripheral devices when they
are not in use. It defines power management on a wide range of mobile,
desktop, and server computers and peripherals. It also enables manuurers to produce computers
that automatically power up as soon as a user touches the keyboard.
Reference: "http.//en.wikipedia.org/wiki/Energy_Star"
NO.8 Which of the following statements about a riser card is true?
A. It is used to connect a computer in a network.
B. It is used to connect extra microprocessors.
C. It provides extra memory for expansion cards.
D. It is used to extend slots for expansion cards.
Answer: D
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Explanation:
Riser card is a circuit board that is used to extend slots for expansion cards and provides the ability
to connect additional expansion
cards to the computer. These cards are used with LPX motherboards.
With the introduction of ATX motherboards, riser cards are rarely used. In ATX motherboards, the
expansion cards
connect directly to the computer motherboard instead of using riser cards. What is
LPX? LPX is a motherboard form or that is used in some desktop computers. In
LPX motherboards, expansion cards are inserted into a riser card that contains several
slots. Unlike other common form ors such as AT and ATX, the expansion cards in LPX
are not vertical, but parallel to the motherboard. The LPX form or is designed for
smaller cases, and usually it is used for connecting two or three expansion cards.
