Computer Repairing and Maintenance Grade 10 Computer Engineering 2073 Paper Solution

 

SEE 2073

Group A

1.       Write any two special key found in our keyboard.

àThe special key found on keyboard are:

·         Folder control Key

·         Audio control Keys such as Turn up and down the volume

 

2.       Define boot disk.

à A boot disk is a removable data storage medium used to load and boot an operating system or utility program.

 

3.       What is the function of system case?

àFunction of system case is to serve as a protective structure for the rest of the internal components where they will be assembled.

 

4.       Samikshya heard two beep sound when turning her computer on. What is the problem on her computer?

àProblem is either failed RAM modules or they are not seated properly.

 

Group B

5.       Write any four units used for memory measurement.

àFour units used for memory measurement are:

·         Bit (Binary Digit)

·         Nibble

·         Byte

·         Kilobyte (KB)

·         Megabyte (MB)

·         Gigabyte (GB)

·         Terabyte (TB)

 

6.       Differentiate between LCD and CRT monitor

à

CRT	LCD
CRT is much larger than an LCD	LCD monitors are much thinner than CRT monitors
Although a CRT can have display issues there is no such thing as a dead pixel on a CRT monitor.	LCD monitors can encounter dead pixels, which causes small black or other colored dots in the display.
A CRT monitor are heavy than LCD monitor	LCD monitors can be pretty light, weighing as little as 8 to 10 pounds.
The price of most CRT monitors is very cheap.	LCD monitors are a newer technology and have mo   re demand so will be more expensive than a CRT.
The frame around the glass screen of the monitor causes the viewable area of the screen to be smaller than an LCD.	The frame around the glass screen of the monitor causes the viewable area of the screen to be smaller than an LCD.
Because of the older technology most CRT monitors will not have as good as quality as picture as most LCD displays.	Depending on the quality of the LCD monitor, the picture quality can be quite superb and amazing, almost like looking out a window.
A 17" CRT monitor will use as much as 80 watts, depending on the age.	LCD monitors are very energy efficient. A 19" LCD monitor only uses about 17 to 31 watts on average

 

7.       Give any two example of virus and two example of antivirus software.

àExample of virus:

·         Netsky

·         ILOVEYOU

·         Melissa

·         MyDoom.

Example of Antivirus:

·         Norton antivirus

·         Avast antivirus

·         Kaspersky antivirus

·         Panda antivirus

 

8.       Write any two importance of backup.

àTwo importance of backup are:

·         Easy Recovery: Backup is the most reliable, easiest, and the safest way to restore your lost files after data loss.

·         Peace of Mind: When you take regular backups or automate the backup tasks, it gives you a sense of data security. And thus, you don’t have to worry about various factors that often lead to data loss.

·         Saves Business: Data is the most important asset for business. A study shows that 60% business can’t survive even 6 months after data loss. With regular backup, one can ensure data security and business continuity in the event of data loss.

 

9.       Write any two importance of book disk.

àTwo importance of boot disk are:

·         For Hardware or software troubleshooting

·         Installing a full-scale operating system

·         Accessing the operating system when passwords are lost

·         Data recovery to restore damaged, corrupted or inaccessible data

10.   Write any two function of SMPS.

àFunction of SMPS are:

·         To convert alternating current to direct current using rectifiers and vice-versa using invertors. Similarly AC-AC using frequency changer and DC-DC using convertors.

·         To step up or step down unregulated input voltage to produce regulated output voltage.

·         To invert and produce multiple dc output voltage for required parts using various converters.

·         Protection from short circuit and over load.

·         SMPS regulate and provide reliable output irrespective of variation in input voltage for proper functioning of your computer.

 

 

11.   Define resolution. Give standard value for monitor resolution.

à The number of horizontal and vertical pixels on a display screen is called Resolution. The standard value for monitor resolution is 1920 x 1080

12.   What is disk partitioning? Name two letter that can't be used for hard disk partitions.

à Disk partitioning or disk slicing is the creation of one or more regions on secondary storage, so that each region can be managed separately. Two letters that can't be used for hard disk partition are A and B.

 

13.   Name two power protection devices.

àTwo power protection devices are:

·         UPS – Uninterruptible Power Supply

·         Surge suppressors

·         Voltage stabilizers

·         Spike Guard

·         Volt Guard

 

14.   What is cache memory? Write its one function.

à Cache memory is a small-sized type of volatile computer memory that provides high-speed data access to a processor and stores frequently used computer programs, applications and data. The function of cache memory is to hold those parts of data and program which are most frequently used by the CPU.

 

15.   Write any two significance of video card.*

àTwo significance of video card are:

·         Overall System Performance Increase

·         Better Gaming Experience

 

16.   The display of a laptop is very dim. What is the problem and solution to it?

à

Causes:

·         Low brightness

·         Adaptive brightness is turn on

·         Outdated or buggy graphics drivers.

·         Faulty hardware

·         An outdated BIOS

·         System isn’t getting a steady current

Solution:

·         Adjust brightness

·         Turn off adaptive brightness

·         Update graphics drivers

·         Hardware problems

·         Update The BIOS

·         Examine power sockets, ports, and wires

 

Group C

17.   Define form factor. Explain system case form factor.

à Form factor is a hardware design aspect that defines and prescribes the size, shape, and other physical specifications of components

, particularly in electronics. System case form factor are described below:

·         Full Tower: Full tower are generally big with a height that is about more than 30 inches. The number of internal drive bays inside these cases can be between 6 and 10. This case is usually used for high powered servers. It also supports the different types of motherboard, making it very expensive.

·         Mid Tower: Mid tower cases are most widely used computer cases. Unlike a full tower case, a mid-tower case will work in a smaller space as these cases are about 18 to 24 inches high. These case usually contain 2 to 4 internal drive bays and a similar number of external bays. These cases also have cable management options

·         Mini Tower: Since more people want their pc case to be portable but at the same time they don’t want to sacrifice their expansion capability, the mini tower was created. Mini tower cases normally stand at a height of 12 to 18 inches. These cases usually have up or 2 or sometimes 3 internal drive bays. Expandability is the problem with these cases.

 

18.   What is system bus? Explain its types.

àSystem bus the pathway composed of cables and connectors used to carry the data from one part of a computer to another. Types of system buses:

·         Address Bus: Carries the addresses of data (but not the data) between the processor and memory

·         Data Bus: Carries data between the processor, the memory unit and the input/output devices

·         Control Bus: Carries control signals/commands from the CPU (and status signals from other devices) in order to control and coordinate all the activities within the computer

 

19.   What are the steps to be taken to prevent from computer virus?

àAlready done

 

20.   What is media rotation? Why is it important? Write it demerits.*

à

 

21.   Write the possible causes and solution if your computer could not detect CD drive.

àCauses:

·         The driver of CD drive is damaged, outdated or missing.

·         CD DRIVE is not inserted properly on cd player.

·         Drive itself may be dead.

·         Improper BIOS setting

·         The registry is corrupted and needs to be changed.

Solutions:

·         Update or reinstall CD/DVD Driver

·         Connect data cables properly

·         Replace the CD drive

·         Correct the BIOS setting

·         Fix corrupted registry entries or create a registry subkey

 

22.   Write the steps to change the resolution of a computer.

à The steps to change the resolution of a computer:

1.       Go to Windows Settings (Windows key + i) –> System –> Display

2.       Near the bottom of this menu, you will find a section labeled “Resolution.” Click on the arrow next to the resolution that’s currently set to see a drop-down of available options.

3.        Select the resolution that you believe best fits your needs. Windows also shows the recommended screen resolution according to your monitor compatibility and refresh rate. These are preset sizes and can’t be changed or customized.

4.       After selecting your desired resolution, hit the Apply button. Windows will give you 15 seconds to check the new resolution. If it creates any issues, you can revert within the 15-second timeframe by clicking the Revert button. Otherwise, press Keep Changes button. After that, the new resolution takes effect permanently.