Computer Repairing and Maintenance Grade 10 Computer Engineering 2074 Paper Solution

SEE 2074

Group A

1         Write the full form of DVD.

àDigital Versatile Disc.

 

2         Write the full form of SMPS.

àThe full form of SMPS is Switched Mode Power Supply.

 

3         What is socket?

àSocket is a connection that allows a computer processor to connect to a motherboard.

 

4         What is the use of antivirus software?

àAn antivirus software, as the name indicates, is a program that works against a virus. It detects or recognizes the virus, and then after detecting the presence of the virus, it works on removing it from the computer system.

 

5         Define storage media>

àIt is a storage device is any hardware capable of holding information either temporarily or permanently.

 

6         What is UPS?

àAn uninterruptible power supply or uninterruptible power source (UPS) is an electrical apparatus that provides emergency power to a load when the input power source or mains power fails.

 

7         Write the full form of PCI.

àThe full form of PCI is Peripheral Component Interconnect.

 

8         What is hard disk?

àA hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical data storage device that uses magnetic storage to store and retrieve digital data using one or more rigid, rapidly rotating platters coated with magnetic material.

 

9         What is the voltage of Vss of processor?

àVoltage of Vss of processor is 0 v.

 

10     What is interface?

à An interface is a shared boundary across which two or more separate components of a computer system exchange information. For example, IDE and SATA are disk drive interfaces for computer hard drives and ATAPI is an early interface for CD-ROM drives.

 

11     Write any two names of antivirus?

àTwo antivirus are:

·         Norton Antivirus

·         Kaspersky Antivirus

·         AVG Antivirus

·         Avast Antivirus

·         Panda Antivirus

 

12     What is backup?

à A backup is a copy of important data that is stored on an alternative location, so it can be recovered if deleted or it becomes corrupted.

 

13     What is virus scanning?

à A virus scanning is the process of using anti-virus software to scan and identify viruses in a computing device.

 

14     Define 'cooling'?

àCooling refers to the dissipation of large amounts of heat, which is created while a computer system is running.

 

15     What is 'Boot time error message'?

àThe error message which is generated by BIOS during booting of computer is called boot time error message.

 

16     What is troubleshooting specific component?

à The components that are used for identifying and resolving a problem, error or fault within a software or computer system.

 

17     What is System configuration?

à Configuration is the manner in which components are arranged to make up the computer system.

 

Group 'B'

18     Why is graphics card used?

àIt is used to increase the video memory of a computer, and make its display quality more high-definition. It makes the computer more powerful and gives it the capacity to do more high-level works. It is very much important for gaming and video editing on a PC.

 

19     What is media size matching?

àIt is the process of matching the size of medium to the amount of data you need to backup.

 

20     What is secondary storage?

àIt is a non-volatile device that holds data until it is deleted or overwritten.

                Example: HDD, Pen drive etc.

 

21     Why blue ray disk is used for storing data?

àSince the wavelength of blue light is shorter than that of red light, more data can be packed on to a Blu-ray disc, thus the blue light can be used to ‘resolve’ smaller areas of data on the disc. What this means is that the physical areas where data is recorded on the surface of a Blu-ray disc are comparatively smaller than CDs and DVDs. This means that more data can be recorded using the same surface area with a Blu-ray disc than with the other optical disc formats.

 

22     List the types of monitors available in the market.

àThe types of monitor available in the market are:

·         CRT(Cathode Ray Tube) monitors

·         LCD(Liquid Crystal Display) monitors

·         LED(Light Emitting Diode) monitors

 

23      Write any two names of power supply.

àTwo names of Power supply are:

·         AC-DC supply

·         DC-DC supply

 

24     Differentiate between CD-R and CD-RW.

à

CD-R ( Compact Disk-recordable)	Compact Disc-ReWritable.
Data can be stored only once in CD-R.	Data can be stored multiple times in it.
It cannot be erased.	It can be erased.
It is cheaper than CD-RW.	It is costly among all CD types.
It is effective for long term back-ups.	It is the best for transferring data.

 

 

25      Write two symptoms of virus infection.

àTwo symptoms of virus infection are:

·         Unexpected pop windows appearing

·         Slow performance

·         Missing or extra files

·         Sudden crashes or freezes

·         Unexpected error message.

·         Advertisements

·         Unwanted programs starting automatically.

 

26      What is motherboard? List any two types of motherboard.

àMotherboard is a printed circuit board containing the principal components of a computer or other device, with connectors for other circuit boards to be slotted into. Types:

·         ATX(Advanced Technology extended)

·         LPX(Low profile Extension)

 

27      What may be the cause that your system produces continuous beep sound?

àThe Cause may be following:

·         RAM is not inserted properly

·         Power supply problem

·         Something wrong with CPU.

·         Video card failure

·         Keyboard Controller Failure.

 

28     What do you mean by system case? Write its types.

à A computer case, also known as a computer chassis, tower, system unit, or cabinet, is the enclosure that contains most of the components of a personal computer usually excluding keyboard, display and mouse. Its types are:

·         Mid tower case

·         Mini Tower case

·         Full Tower case

Group 'C'

29      What is system BIOS? Write the function of BIOS and explain them.

àSystem BIOS is firmware used to perform hardware initialization during the booting process (power-on startup), and to provide runtime services for operating systems and programs.

The four main functions of a PC BIOS

·         POST - Test the computer hardware and make sure no errors exist before loading the operating system.

·         Bootstrap Loader - Locate the operating system. If a capable operating system is located, the BIOS will pass control to it.

·         BIOS drivers - Low-level drivers that give the computer basic operational control over your computer's hardware.

·         BIOS setup or CMOS setup - Configuration program that allows you to configure hardware settings including system settings such as computer passwords, time, and date.

 

30      Write about the construction and operation of HDD. Describe cylinder, sector and track also.

à HDD is a magnetic storage device. It consists of several platters which are usually made up of aluminum and are coated with magnetic material. HDD stores the data on these platters. The platters are stacked onto a spindle and rotated by a spindle motor at very high speeds. Each platters requires two read/write head, one for each side. Each read/write head is attached to separate arm, and controlled by common arm assembly.

When a the computer wants to retrieve data off of the hard drive, the motor will spin up the platters and the arm will move itself to the appropriate position above the platter where the data is stored. The heads on the arm will detect the magnetic bits on the platters and convert them into the appropriate data that can be used by the computer. Conversely, when data is sent to the drive, the heads will this time, send magnetic pulses at the platters changing the magnetic properties of the platter, and thus storing the information.

 

·         Track: A disk drive track is a circular path on the surface of a platter on which information is magnetically recorded and from which recorded information is read.

·         Cylinder: A cylinder is the  set of all of the tracks of equal diameter through each platter

·         Sector: The wedge shape section of circular track is called sector.

·         Head: Disk read/write heads are the small parts of a disk drive which move above the disk platter and transform the platter's magnetic field into electrical current (read the disk) or, vice versa, transform electrical current into magnetic field (write the disk).

31     Why backup scheduling is needed to computer? Which device and media do you use for backup? Explain any one.

à Backup scheduling is needed to computer for specifying which data sources and data gets backed up, when, and how often.

 I can use following devices for backup:

·         Tape Driver: The main advantage of using tape drives is they are reliable storage devices as data stored on the tape drives can be read securely even after decades of storage. Because of this, many enterprises (or large businesses) use tape drives as their main backup system.

·         Optical discs (CDs, DVDs and Blu-ray) are popular storage devices for home users. They are commonly used for system backup and restore as they are inexpensive and portable. However, optical discs are more prone to damage or scratches, and the data on the disc may become unreadable very easily. Optical discs require special hardware/software to read and write, and this may be a problem if your laptops or desktop PCs don’t have an optical drive or it does not support all drive formats.

·         SD cards, or memory cards, are small storage devices that are used to backup documents, pictures, video, or audio files. The advantages of using SD cards are they are compact, portable and provide easy access to data. They are widely used to save small amount of data on mobile phones, cameras, and computers. SD cards are more expensive than hard disks, CD or DVDs. In addition, SD cards can break easily, and you may lose data stored on it.

·         Hard disk drives (HDD) are the most popular data storage devices for home and business users. Hard drives are portable and affordable storage devices. They are available in different shapes and sizes with storage capacities ranging from megabytes to terabytes. You can easily connect a HDD to your computer and backup files to it.

·         Solid State Drive (SSD) is another storage device which is replacing hard disk drives. SSD's are much faster, more durable, and reliable than HDD's. However, SSD's are more expensive (although costs are decreasing) and the device cost can increase considerably with the storage capacity.

 

31 Write the causes and solution that your system could not recognize newly purchased scanner.

àCauses:

·         Incorrect installation of scanner drivers

·         The scanner not connected correctly.

·         Faulty port

·         Damaged Scanner

Solutions:

·         Reinstall the scanner driver software

·         Connect the scanner correctly.

·         Try connecting scanner to the fine port

·         Replace the scanner

 

32      What may be the causes of monitor failure? Write down the appropriate solution.

àCauses:

·         High or low resolution

·         Loose or faulty video cable.

·         Display card driver is not installed properly

·         SMPS doesn’t provide accurate power

·         CPU not fixed properly on socket

Solution:

·         Restart the computer is safe mode and reset the best resolution.

·         Tighten down the cable on both end or simply replace the cable.

·         Reinstall the display card driver properly.

·         Check the SMPS

·         Fix the CPU properly on the socket.

 

33     Write the causes and solution of system slowdown.

àCauses:

·         Virus Infection

·         Running many programs at the one time(Ram overload)

·         No free space in hard drive.

·         CPU fan doesn’t working properly

·         Low speed of CPU

·         No enough memory

Solutions:

·         Run a virus scan and keep up-to-date Anti-Virus.

·         Close the unnecessary programs.

·         Delete unnecessary files from the hard disk

·         Check the CPU fan

·         Replace the older CPU with the high speed CPU

·         Upgrade the memory