Third Edition Computer Whiz Class 5th

Lesson #1

Generations of Computers

Exercise

ANSWER THE FOLLOWING QUESTIONS:

vacuum tube

 Why did vacuum tubes need to be replaced?

Ans: A vacuum tube need to be replaced because it get

 overheated and often break down.

Q2.Which device was used in second-generation 

computers?  Is why it is a successful venture?

Ans: Transistor was used in second-generation computers.

Yes, it was a successful venture.

Q3.Why was the invention of integrated circuit an important milestone?

Ans: Because it carries electronic signals that tell the computer what to do .It can read and flow billions of instructions per seconds.

transister

Q4.What is a circuit board?

Ans : A board with several chips is called a circuit board.

  

                     

Lesson #2

Peripheral devices

ANSWER THE FOLLOWING QUESTIONS

peripheral devices

Q1: What is a peripheral?

Ans: A device that is not a part of the main processing system but is

 used with the computer is called peripheral device.

Q2: Why is the term integrated used to describe some peripherals?

Ans: Because they are located inside the system unit.

Q3: What is a GUI?

barcode reader

Ans: Graphical user interface is used in graphics programs to draw pictures.

Q4: What are barcode used for?

Ans: Barcode readers are used to read barcodes printed on grocery items and books. It is used for storing data about product.

Q5: Describe MICR technology in your own words?

Ans: The magnetic ink character reader (MICR) system uses special

MICR

 ink and characters. It mostly used in banks.

Lesson #3                   

More about programming languages

ANSWER THE FOLLOWING QUESTIONS

Q1: How do algorithms different from flow charts?

Ans: An algorithm is an organized set of steps to solve a particular problem but a flow chart is a collection of shapes that shows the flow of information in a program.

Q2: Discuss the importance of syntax in programming?

Ans : Syntax is a set of rules for  a language .Syntax tells the programmer how words and symbols should be arranged in a statement .

Q3: What is the difference between numerical data and string data?                   

Ans: Numeric data consists of numbers used for calculations. String data consists of letters numbers and special characters.

Q4: Which commands are commonly used in programming languages?

Ans : Commands such as CLS and SAVE are used in programming languages .

Lesson #4

Introduction to GW-BASIC

ANSWER THE FOLLOWING QUESTIONS    

Q1: What is GW-BASIC?

Ans : GW-BASIC is a simple programming language .

Q2: Define command and statement?

Ans : A command is an instruction given to  the computer to perform a specific action .A statement is an instructions that tells the computer to perform an action in the current program.

Q3: What is the significance of syntax?

Ans: Syntax is a set of rules for a language.

Lesson #5                    

More about word processing

ANSWER THE FOLLOWING QUESTIONS

Q1: What is the Alignment feature used for?

Ans: Alignment feature is used to align a paragraph to the right, left and center etc.

Q2: Why is the setting for a gutter margin used for printing books?

Ans: Gutter margin helps to prevent a text from being hidden when the pages are       bound.

Q3: Explain text wrapping.

Ans: Text wrapping is takes place when text moves automatically to the next line as it is typed.

Q4: When do we use the Paste Special feature?

Ans: The Paste Special feature is used to paste text in the same format as the destination document.

Q5: When is the Bullet feature used for?                                       

Ans: A Bullet feature is used to create a bullet list.