ITCS-P1

Exercise Solutions

1. Full Forms of Abbreviations

Abbreviation Full Form
CPU Central Processing Unit
RAM Random Access Memory
CBIS Computer Based Information System
GIGO Garbage In Garbage Out
CD Compact Disc
DVD Digital Versatile Disc
KB Kilobyte
MB Megabyte
GB Gigabyte
EB Exabyte
CBE Computer Based Education
CAD Computer Aided Design

2. Multiple Choice Questions

  1. The word computer is derived from the Latin word Computare.
    Answer: d. Computare

  2. Which unit of time is equal to one billionth of a second?
    Answer: c. nanosecond

  3. When the input is wrong, then the output will also be wrong, it is termed as:
    Answer: c. GIGO

  4. Repeatedly working capability of a computer is known as:
    Answer: c. diligence

  5. What is the most crucial component of a computer system, often referred to as the "brain"?
    Answer: c. CPU

  6. Which of the following is NOT a key characteristic of computers?
    Answer: c. Intelligence

  7. In which area of application are computers not commonly used?
    Answer: d. Traditional Craftsmanship

3. Appropriate Technical Terms

Question Technical Term
A combination of hardware and software to perform tasks. Computer System
An electronic device that processes and stores information according to a set of instructions. Computer
Terminology which describes that incorrect input data will always lead to incorrect output. GIGO
Features of computer which shows that computers can be used for a wide range of tasks. Versatility
The ability of computer to perform tasks automatically without human intervention. Automation
Data and instruction entered into the computer. Input
Meaningful information displayed from the computer. Output
Ability of computer to store data and information for future use. Storage

4. Short Answer Questions

a. Define a computer in your own words.

A computer is an electronic device that accepts data, processes it according to instructions, stores it and produces meaningful information as output.

b. List any four characteristics of computers.

  • Speed
  • Accuracy
  • Diligence
  • Versatility

c. Give an example of how computers are used in healthcare.

Computers are used in healthcare to store patient records, prepare medical reports and operate medical equipment.

d. How has the use of computers impacted education?

Computers have improved education by making online learning, digital classrooms, research and communication easier and faster.

e. Why is computer called a diligence machine? What is GIGO?

A computer is called a diligence machine because it can perform repetitive tasks continuously without getting tired or losing accuracy.

GIGO stands for Garbage In Garbage Out. It means if incorrect data is entered into a computer, the output will also be incorrect.

f. Convert as indicated:

i. 23 MB = ? KB 

1 MB = 1024 KB
23 MB = 23 × 1024
      = 23552 KB

Answer: 23552 KB

ii. 620 KB = ? Bytes 

1 KB = 1024 Bytes
620 KB = 620 × 1024
       = 634880 Bytes

Answer: 634880 Bytes

5. Long Answer Questions

a. Explain the function of computer system with block diagram.

A computer system works through four major units:

  • Input Unit
  • Processing Unit (CPU)
  • Storage Unit
  • Output Unit

The input unit accepts data from the user. The CPU processes the data according to instructions. The storage unit stores data and information for future use. Finally, the output unit displays the processed information.

Block Diagram of Computer System

+-------------+      +-------------+      +-------------+
| Input Unit  | ---> |     CPU     | ---> | Output Unit |
+-------------+      +-------------+      +-------------+
                            |
                            |
                    +---------------+
                    | Storage Unit  |
                    +---------------+

b. Explain any three application areas of the computer.

1. Education

Computers are used in schools and colleges for online learning, preparing notes, research and conducting exams.

2. Healthcare

Hospitals use computers for maintaining patient records, medical diagnosis and operating modern medical devices.

3. Banking

Banks use computers to maintain customer accounts, perform online transactions and manage ATM services.