Q1. Fill in the blanks with suitable words:
a. software
b. mouse
c. set of instructions
d. hertz
e. clock rate
f. communication systems
Q2. Match the following column:
Data → Raw fact
GIGO → Accuracy
Computer game → Entertainment
CAI → Teaching aid
Q3. Sate whether the following statements are True and False:
a. True
b. False
c. False
d. False
Q4. Write full forms of the following:
a. CPU : Central Processing Unit
b. GHz : Giga Hertz
c. GIGO : Garbage In Garbage Out
d. E-mail : Electronic mail
e. CD : Compact Disk
f. DVD : Digital Versatile Disk
g. CAI : Computer Aided Instruction
h. CBT : Computer-Based Training
i. ICU : Intensive Care Unit
j. ECG : Electrocardiograph
k. GUI : Graphical User Interface
Q5. Write the technical terms for the following statements:
a. Diligence
b. Versatile
c. GIGO
d. Data
Q6. Select the correct answer from the given options.
a. iii. Input, Processing and Output
b. iv. All
c. i. GIGO
d. ii. Output
Q7. Write very short answer of the following questions:
a. What is data?
Ans: Raw facts or symbols also known as unprocessed information collected from various sources is known as data. For example Ram, 7, student.
b. What is the measurement unit of clock speed of computer?
Ans: The measurement unit of clock speed of computer is in hertz. It can be measured in MHz or GHz.
c. Write any one use of computer in medical field.
Ans: All the laboratory tests such as X-RAY, CT-SCAN etc. are performed by computers.
d. Which unit of computer is used to process data?
Ans: Central Processing Unit(CPU) is used to process data.
e. Is computer, an electronic device?
Ans: Yes, computer is an electronic device.
f. What is GIGO?
Ans: If the input data are incorrect, the output will also be incorrect, this principle is referred as GIGO.
g. Why is computer called versatile machine?
Ans: Computer is called versatile machine because it can perform different kinds of tasks one by one simultaneously.
Q8. Write short answer of the following questions:
a. Define Computer and draw the figure of computer.
Ans Computer is an electronic machine, that accepts the data and instructions from the user, processes the data according to given set of instructions, stores and gives the information.
For fig see on page number 6
b. How are computers used in education and entertainment?
Computers in Education
Computers are widely used in the field of education. Teachers can explain difficult topics more clearly and easily to their students using computer-based presentations. Students can learn different subjects more clearly and easily with the help of computer. Open universities are launching their distance learning programs through computer-based training (CBT) which is also called Computer Aided Instructions (CAI).
Computers in Entertainment
Computer can be taken as a good means of entertainment. We can play games, watch movies and listen music on the computer. In movies special effects are added to make it like real. Cartoon and animation movies are developed with the help of computer.
c. Explain the working system of a computer with an example.
Ans: Computer perform its task on the basic principle of Input Process and Output (IPO). Computer takes raw data as input through the input devices such as keyboard, mouse, joystick, etc and computer process the input data according to the given set of instructions and after processing, input data, computer gives the meaningful information as output.
[Data: 7, 9, 11 ] → [ Addition ] → [ 27 ]
(Input) → (Process) → (Output)
d. List any four characteristics of a computer.
Ans: The four characteristics of a computer are:
i. Accuracy ii. Diligence iii, Versatility iv. Automation
e. List any five application fields of a computer.
Ans: The five application fields of a computer are:
i. Home ii. Education iii. Medicine and Health iv. Entertainment v. Industry
f. Why is computer called an information processing machine?
Ans: Computer converts raw data into meaningful information by performing various actions on the given data so it is known as information processing machine (IPM).
g. Write short notes on :
a. Accuracy:
Computer is an accurate machine. It doesn't make any mistakes, if the data and instructions given to the computer are correct, it always gives correct result or output. If the input data are incorrect, the output will also be incorrect, which is also known as Garbage In Garbage Out (GIGO).
b. Diligence:
Computer is a diligent machine. It can continuously work for a long time without creating any error. It can perform same task again and again without getting bored. It performs the calculations with the same accuracy and speed though it works for long time.
c. Versatility:
Computer is a flexible machine. It can perform different kinds of tasks one by one simultaneously. It can perform the several tasks such as calculations, drawing pictures, playing game, playing music, writing letters, sending e-mail, etc. We can use the same computer in different fields for different tasks.
d. Computer in Medicine and Health:
Computers are used for diagnosing illnesses, monitoring the condition of patients, keeping the necessary records. It can be used in the different units such as ICU, ECG, Operation Theater, Recovery Room, Medical Ward, etc. All the laboratory tests are performed by computers. Computers are used to monitor patients continuously.
h. What is an online payment gateway?
Ans: An online payment gateway is a service which allows users/customers to do direct financial transactions by using credit card over the internet and other modes. For Example Esewa, Khalti, IME pay etc.
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