Select The Diploma in Information Technology (DIT) Papers

Computer Network 2nd Term 2021
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Ms- Access DIT Part 2nd 1st Term Exam 2014
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DIT Part 2nd Solved Exam paper of Graphic Designing
Solved exam papers of IT DIT part 1st Exam 2103
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DIT Exam paper of Data Base 2014
DIT Exam paper of MS Access 2014
DIT Exam paper of Graphic Design 2014
DIT(Part 1st) Solved Exam Paper 1st Term Exam 2012 IT
DIT(Part 1st) Solved Exam Paper 1st Term Exam 2012 IT
Exam Paper of Office Automation for DIT Part First 2013
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Exam paper of Operating System DIT Part First 2013

Solve Paper of Information and Communication Technology

DIT part 1st (1st Term Exam 2012)

  Time Allowed: 3            Hours Max Marks=100                                                                 

Not:- Attempt any five questions. At least two qustion from each part. All questions carry equal marks. Mobile Phone & Programmable calculator arc not allowed.

Q1. Define Information technology ? Explain function of IT in electronic data processing?

Answer:
Information technology is combination of two technologies Computer Technology and Telecommunication technology. Where computer technology storing information, protecting information, processing the information and on the other hand telecommunication technology related with transmitting the information.

There are following major components of IT.

1. Computer science
2. Telecommunication engineering
3. Computer engineering
1.Computer science (or computing science): -

Capturing The Input Data:

The input is primly step for EDP. The data can be captured directly in the paperless machine-readable form rather then its store first in manual form. For example you can get the user input directly form on line form. User use his ATM or Credit Card , thumbs expression system, capturing the price with bar cod reader.

Manipulating the data:

Data manipulation is the process of taking data and manipulating it in a method to be easier read or organized. For example Arranging the data, Arithmetic manipulation in which calculation are involve. This will be easily done by the help of IT. There are many query languages which provide very enhance manipulation system. Word processor also one the example of manipulation in EDP. Managing the output result
When data is gather and manipulating according to the desire output. The data is ready to presented. The output is display on the screen and data is saved on the file, which can be printed on a print attached. To get the hard copy of it.

Q2. Explain the Components of Computer system in detail with the help of diagram?

Answer:
Every computer is made up of four-basic units which are following.  
1. Input Unit
2. Output unit
3. Central Processing Unit (CPU)
4. Memory Unit

Input unit: -

The basic unit, which provides communication between the user and the computer, is the input unit. This unit describes a device, used to transfer information into a computing system. It performs following three functions.

1- It accepts data from user.
2-Converts that data into electrical signals, which can be later, used in arithmetical calculations.
3- Coded data is then moved to the system for processing.

The data can be fed into a computer by using different types of input devices. The commonly used input devices are Keyboard, MOUSE etc.

Central Processing Unit (CPU)

CPU is short form central processing unit. The central processing unit is responsible for performing all of the mathematical and logical calculations that are required for a computer to function properly means that work of CPU is Data Processing. The function of CPU is consist on four steps to perform processing function. The first step in this cycle is to fetch a instruction from a software program's memory. Once the CPU fetches the instruction, its second step is to decode the instruction. By decoding the instruction, the CPU is able to organize the information from the instruction in a manner that allows the CPU to complete the next step, which is executing.

Memory Unit:

Memory unit responsible for storing the information permanently and temporary during the processing. Computer memory is mainly divided in to two types.

Primary Memory
Secondary Memory

Primary Memory:

Primary memory stores the information in form of binary coded data. Primary memory holds the input data (before processing), result for output purpose (after processing) and also provides the permanents storage as requested. It is usually refer to main memory and also known as Internal Memory.
Main memory consists on RAM, ROM, and Cache Memory. Secondary Memory: The Secondary Memory is also known as auxiliary storage or external storage which store the permanently.

Out Put Unit:

The out put unit give the output of our input after processing. This is final step , which presents the results of the machine operations in printed or other visual form. It is a device that receives results from a CPU. It can be a communicating link between a computer and people. It. is used to transfer information out of a computing system.

Q3. What is Hard copy output device (printer) Describe the various type of Printers?

Answer:
The output device which provide the Hard copy of our document is called Printer. Printer prints whatever is on the monitor onto paper. Printers can print words, numbers, or pictures.
The two main types of printer are impact and non-impact printer.
Impact Printers: Impact Printers use a print head containing a number of metal pins, which strike an inked ribbon placed between the print head and the paper. Some print heads have only 9 pins to make the dots to build up a character; some have 24 pins, which produce a better resolution.

Non-impact printers

This type of printer that does not operate by striking a head against a ribbon. Examples of non-impact printers include laser and ink-jet printers. The term non-impact is important primarily in that it distinguishes quiet printers from noisy (impact) printers.
The main types of non-impact printer are:

Thermal printer:

Characters are formed by heated elements being placed in contact with special heat sensitive paper forming darkened dots when the elements reach a critical temperature. Paper tends to darken over time due to exposure to sunlight and heat. The s standard of print produced is poor. Thermal printers are widely used in battery-powered equipment such as portable calculators. A fax machine uses a thermal printer

Laser Printers:

Use a laser beam and dry powdered ink to produce a fine dot matrix pattern. This method of printing can generate about 4 pages of A4 paper per minute. The standard of print is very good and laser printers can also produce very good quality printed graphic images

Ink Jet Printer :

Characters are formed as a result of electrically charged or heated ink being sprayed in fine jets onto the paper. Individual nozzles in the printing head produce high resolution (up to 400 dots per inch or 400 dpi) dot matrix characters. Inkjet printers use color cartridges, which combine magenta, yellow and cyan inks to create color tones. A black cartridge is also used for crisp monochrome output. This method of printing can generate up to 200 cps and allows for good quality, cheap color printing.

Q4. Define software? describe the system software in detail?

Answer:
Computer software are collection of programs where program are instruction to given to computer to perform any specific task. There are two type of software system software which are design to control the hardware and manage the computer system for example operation system and drivers on the other side Application software are are those program which perform some specific task such that word processor , multimedia software etc.

System software:

System software are those programs which have some instructions which control the Hardware and also other software such that applications in computer. we can say that system software are interface between hardware and user applications. The function of System software are performs the responsibility of overall supervision of input, processing and output of data. It keeps track of all the peripherals equipment attached with the computer, and monitors their activities. System software are divided into following categories:

Operating Systems: -

The operating system provide an interface in which user can perform basic function on computer such that I/O function. The OS create a link between user and computer and manage all the application and hardware resources.

Device Drivers: -

When you purchase a new peripheral hardware device, such as a CD-ROM drive, a mouse or a printer, you need to install software that tells the computer how to use the device. This type of system software is called Device Driver.

Utility Programs:

Utility program are those program which are designed to help analyze, configure, optimize or maintain a computer. For example backup, data recovery, file de fragmentation, disk repair, and virus protection.

Translator:

Translator are also system program that converts source program into object program. When programmer write the instruction in any computer language then Translators convert these instructions in machine code , because computer can only understand machine language.

Q5. Convert the following :

(110111)2 = (?)10
(752)8 = (?)2
(11101111)2 = (?)16
(A284 ) 16 = (?)2

Q6. Explain main memory in detail?

Answer:
Memory is electronic circuitry that holds data and program instructions until they processed. Memory devices responsible for storing the information permanently and temporary basses during the processing.

Computer memory is mainly divided in to two types.
1- Primary Memory
2- Secondary Memory

Primary (main ) Memory:

Primary memory which is also called main memory stores the information in form of binary coded data. Primary memory holds the input data before processing and the information after the processing and also provides the permanents storage as requested. It is also called Internal Memory.

There are following three type of main memory
A)- Random Access Memory (RAM):
RAM is an abbreviation for Random Access Memory. It usually refers to "temporary" memory, as when the system is shut down, the memory is lost. This is why the memory is referred to as being "random," as any piece of information can be circulated through the memory regardless of its location and its relation to any other information within the RAM. The ram store the data before and after the processing.
B)- CMOS Memory:
CMOS is short from Complementary Metal Oxide Semiconductor. This memory hold the data, but requires very little power to retain its contents a CMOS chip is usually powered by battery, CMOS stores data about computer configuration. All configuration such as how many floppy drives are there in computer or the size of hard disk etc, all this data retain in CMOS memory.
C)- ROM:
ROM is short from Read only memory. This memory consist on electronic chips that contains instructions to help a computer prepare for processing tasks. The instructions in ROM are written by the time of manufacturing and permanently store on this chip and you can not change them. When computer is turn on the first of all the instruction are executed are ROM instruction . ROM contains a small set of instructions to tell the computer how to access hard drive and load operating system.
D)- PROM : -
PROM is short for programmable read only memory. This type of memory also consist on a electronic memory chip on which data can be written only once. Once a program has been written onto a PROM it remains there forever. The difference between ROM and PROM is that a PROM is manufacturing as blank memory, whereas a ROM is programmed during the manufacturing process. To write data onto a PROM chip, you need a special device called a PROM programmer or a PROM burner.
e) -EPROM :-
An EPROM is short from erasable programmable read only memory. This is a special type of PROM that can be erased by exposing it to ultraviolet light. Once it is spread, it can be programmed. EPROM is a similar to a PROM, but is requires only electricity erased.

Q7. Define the following:
1-Virus Hoax
2-CAM
3-CAD
4-Softcopy

Answer:
Virus Hoax
virus hoax is an type of virus which come in form of a false warning (message ) about a computer virus. Typically this warning arrives through in an e-mail. The Hoax virus Typically use emotive language in the warnings message and encourage readers to forward the message to other people as soon as possible. The Hoax virus send a message to user users that vital system files are viruses and encourage the user to delete these file.>br> CAM
CAM means computer aided manufacturing. When we use the computers software to control and management of manufacturing processes then this process of manufacturing is called CAM. Such as automatically coordinated operations of conveyor systems, cutting and forming machines, and riveting and welding machines.
CAD
CAD means computer-aided design. CAD software is used by architects, engineers, draft man, artists, and others to create precision drawings or technical illustrations. CAD software can be used to create two-dimensional 2-D drawings and also three-dimensional 3-D drawings. For example AutoCAD, Design Cad 3D, Adobe Illustrator etc.
Soft Copy
Soft copy is an electronic copy of data, such as a file viewed on a computer's screen or file transfer to any one by e-mail as attachment. when you write a document in MS word and save it this called soft copy and when printed then its called hardcopy.

Q 8 Write a short note on The following:

1-Spreadsheet
2-Computer Crime
3-Anti virus
Answer:
Spreadsheet
Spreadsheet is a table of values arranged in rows and columns and Spreadsheet applications are computer programs that let you create and manipulate the data in shape of row and column and manipulate if you need and perform calculation. In a spreadsheet application, each value sits in a cell or Box. Each cell have a name called cell reference or Cell Address according to its placement for example, A1, A2, A3. There are a number of spreadsheet applications on the market, Lotus 1-2-3 and Excel being among the most famous. The more powerful spreadsheet applications support graphics features that enable you to produce charts and graphs from the data.
Computer Crime
Computer crime which also some time called cyber crime or e-crime or electronic crime. Computer crime refers to any crime that involves a computer and a network. When any one use the computer in the commission of a crime then its called computer crime or cyber crime.
Examples of computer crimes
Following are the some of the most popular example of cyber crime.
Making or distributing child pornography.
Hacking, threats, and blackmailing towards a business or person.
Creating Malware - Writing, creating, or distributing malware program
Some kind of Fraud through the computer online system for example Manipulating data, e.g. changing banking records to transfer money to an account.
Deceiving individuals to gain private or personal information about that person.
Distributed unsolicited e-mail to dozens or hundreds of different addresses which is called Spamming.
Unauthorized access to systems you have no permission to access.
Anti virus
Antivirus is a program which is specially design to prevent, detect and remove the malware virus infections from the computing devices. This program of antivirus often called Anti malware. When a virus is detected in your computer the the antivirus program displays a warning asking what action should be done, often giving the options to remove, ignore, or move the file. There are many antivirus program available in market such that "Norton Antivirus , Kaspersky , semantic antivirus





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