Chapter 1: Computer System: Introduction
Book’s exercise page number14
Multiple Choice Questions:
1. Calculator
ii. Compare
iii. Compatible
iv. Computare
b. The measurement unit which is equal to one billionth of second
is....
i. millisecond
ii. microsecond
iii.nanosecond
iv.picosecond
c. When input is wrong, then output will also be wrong, it is
termed as
i. FIFO
ii. LIFO
iii. GIGO
iv. BUG
d. Repeatedly working capability of computer is known as
i.Storage
ii. Speed
iii.diligence
iv. versatility
e In hospitals, computers are used in
i.. Lab
ii. ICU
iii. Operation
iv. All of the above
f. Which of the following is known as electronic brain of
computer?
i. Scanner
ii.Web Cam
iii.CPU
iv. Microphone
g.How many megabytes make one gigabyte?
i. 1010
ii. 2000
iii. 2048
iv. 1024
Short
Answer Questions:
a)
Define Computer and list its features.
A
computer is an electronic device that accepts data as input, processes it
according to instructions, and gives output in a meaningful form.
Features:
1. Speed
2. Accuracy
3. Storage capacity
4. Versatility
5. Connectivity
6. Automation
b)
Why computer is called diligence machine? What is GIGO?
A computer is called a diligence machine
because it never gets tired, bored, or loses concentration. It can perform
repetitive tasks continuously without fatigue.
GIGO: Garbage In Garbage Out → If incorrect
data is entered, the computer gives wrong output.
c)
Explain working principles of computer with block diagram.
Working
Principle: A computer works on the IPO cycle:
1.
Input → Data entered into the system
2.
Process → CPU processes data using instructions
3.
Output → Results are displayed
4.
Storage → Data and results are stored for future use
Block
Diagram:
Input
→ Processing (CPU: ALU + CU) → Output
↓
Storage
d)
Describe "The use of computer in education field".
Computers are widely used in education for:
1. E-learning and online classes
2. Digital libraries and research
3. Computer Aided Instruction (CAI)
4. Virtual labs and simulations
5. Communication between teachers and
students
e)
Mention any four uses of computer. State different units of storage in
computer.
Uses:
1. Banking and finance
2. Education
3. Health sector
4. Entertainment
Storage Units:
1 Bit = smallest unit
1 Byte = 8 bits
1 KB = 1024 Bytes
1 MB = 1024 KB
1 GB = 1024 MB
1 TB = 1024 GB
f)
Convert as indicated:
5 MB = 5 × 1024 KB = 5120 KB
120 KB = 120 × 1024 Bytes = 122,880 Bytes
Long Answer
Questions
a)
Explain the various characteristics of computer.
1.
Speed – Can perform millions of calculations per second.
2.
Accuracy – Produces error-free results if input is correct.
3.
Automation – Works automatically once programmed.
4.
Versatility – Can perform different tasks simultaneously.
5.
Connectivity – Connects with global networks.
6.
Storage – Can store large amounts of data for long time.
7.
Diligence – Does not get tired or bored.
b)
Explain any four modern applications of computer.
1.
Medicine – Diagnosis, patient records, robotic surgery.
2.
Education – Online learning, digital resources, virtual labs.
3.
Business – Online transactions, data management, e-commerce.
4.
Science & Research – Weather forecasting, space research, simulations.
c)
Prepare a presentation about "Computer modern application" and
demonstrate in your class as a group discussion.
d)
Make a block diagram of digital computer and demonstrate in your classroom.
Input Devices
↓
----------------CPU----------------
| | |
Control Unit ALU (Processing) Registers
↓
Primary Storage
↓
Output Devices
↓
Secondary Storage
e)
Make a list of different features of computers and discuss with your friends.
Features: Speed, Accuracy, Automation,
Versatility, Connectivity, Diligence, Storage capacity, Programmability.
f)
Prepare a presentation about different benefits of computer and demonstrate in
your class as a group discussion.