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Computer full notes of class 10

computer full notes of class 10

Short And Long Questions

Question 1 Answer.
Problem Solving: It is a process in which various steps are taken to solve a problem. By problem we mean any task which requires a solution. For example, “how to add two numbers” is a problem similarly, “hot to find the area of rectangle” is also a problem Now, taking various steps to solve these problems is called problem solving.

Steps involved in problem solving:
Problem solving involves the following eleven steps.

Defining the problem: It is the first step taken in solving a problem. In this step the whole problem is defined and studied briefly. It is identified what the problem is? and how it works? Also, all the inputs and outputs are identified.

Requirement Analysis: In this step the various users need/requirements are identified and collected. It is also specified that the solutions (or new system) will provide this and that facilities or features to the users.

Analyzing the problem: In this the problem is studied in details. The whole program is divided into several parts each part is call a sub-problem. Various possible solutions are found and the best solution is selected.

Design the problem: In this step a blue print or plan for the best solution is sketched. This step includes outputs design, inputs design, file design etc.

Writing algorithm: After designing the problem, algorithm is written/developed . An algorithm is a set of well defined steps towards the solutions.

Drawing flow charts: In this step the algorithm is converted into flowchart. A flowchart is a graphical or pictorial form of an algorithm that makes an algorithm more clearer and understandable to other persons. Thsi step is also called logical design. A flowchart consists of various standardized sysmbols.

Coding: In this step the algorithm or flowchart is converted in to a computer program. A computer program a list or series of instructions written in a computer language. So, in this step a list of instructions called program is written.

Testing and Debugging: In this step, the program is tested with dummy data. If some errors are found they are removed. Finding and removal of errors is called debugging.

Implementation: After testing and debugging the program, It becomes capable to work properly. So the program is put into operation or installed to do its work. This is called implementation of the program.

Maintenance of the program: With the passage of time, new user-needs may arise. So, the existing program is upgraded, extended and updated to meet the new hardware and software needs. This is called maintenance of the program.

Documentation: It is the last step involved in problem solving. It contains written information about the whole problem solving process (from problem definition to implementation). It also provides information about the problem, its working etc. In short, these are guidelines and instructions for the user to understand and the operation of the program easily.

Question 2 Answer.
Flowchart: A flowchart is a graphical or pictorial form of an algorithm drawn on paper that makes algorithm clearer.

Why we use flow chart: Flow chart are used due to the following reasons.

A. Flow chart is a graphical shape of an algorithm therefore, It represents all the steps taken towards the solution of a problem in a more clearer and understandable way.

B. It also makes an algorithm understandable to others persons.

C. It represents the order of stops of algorithm in a more better way.

D. It ensure that the algorithm is correct and implementable.

E. It makes writing of a program easier.

Algorithm: It is a set of well defined rules for solving a problem.

Finding sum & average of 3 numbers:

A. Input the numbers.

B. Add 1+2+3.

C. 1+2+3 / 3.

D. Print sum and average.

E. Stop.

Question 3 Answer.

Flowchart definition: A flowchart contains several standard symbols called flow chart symbols. Each flowchart symbol is used for unique purpose. Some commonly used flowchart symbols are as under:

Terminal box: It is a round rectangle which is sued to show the starting point or ending point of a flowchart.

Note: We will add all symbols with details in other post.

Computer full notes of class 10 chapter 1 Short And Long Questions End.

Computer full notes of class 10 chapter 2 starts

Short And Long Questions

Question 1 Answer.
Basic language: BASIC stands for “All-purpose symbolic Instructions Code”. BASIC language is a high level computerlanguage. It is a very easy and friendly computerlanguage, Because its instructions consist of ordinary English words (such as READ, PRINT, IF, THEN, END) and common mathematical symbols (Such as +, -, /, =, <, > etc).

History of BASIC language: In 1963 kurtz developed BASIC at dart mouth college USA. As it was simple and easy language, So it becomes a popular languagevery quickly.

Question 2 Answer.
Program: A program is a list or set of instructions written to solve a particular problem of users.

Structure of a basic program: A basic program consists of a list of instructions. these instructions are called BASIC statements. The statements or instructions in a basic program must follow the following rules.

A. Each statement must begin with an unsigned positive integer (Example 10,20 etc) called “statement number” and line number.

B. Two statements can not have the same statement number.

C. The statement number of the next instructions must be greater than the statement number of the previous instructions.

D. Each statement ends with a carriage Returns (Enter/ CR/).

E. Each statement number msut be followed by a keyboared (such as READ, PRINT, INPUT, IF etc).

F. The last statement in a BASIC program must be the END statement. In other words, Each BAsic program ends with the END statement.

Question 3 Answer.
Arithmetic operators: These are the operators which perform mathematical operations such as addition, subtraction, multiplication, division etc.
Following are the arithmetic operators in BASIC language.

Operators | Purpose of functions

+  It is used for addition.

–  It is used for subtraction.

*  It is used for multiplication.

/  It is used for division.

MOD  It is used to give remainder after division.

^  It Carret (“A” without the mid line) operator is used for power or exponentiation.

( )  parenthesis “( )” are used to change the priorities of operators.

Question 4 Answer.
Variable: It is a name of a memory location whose value may change during program execution.

Types of variables: there are two types of variables
A. Numeric Variables
B. String Variables

Numeric variables: Those variables which can store numeric value are called numeric variables.

String variables: Those variables which can store string variable names end with a dollar sign ($).

Computer full notes of class 10 chapter 2 Short And Long Questions End.

Computer full notes of class 10 chapter 3 starts

Short And Long Questions

Question 1 Answer.
Transfer of control: To jump from one part of a program to an other part is called transfer of control or jumping.

Types of transfer of control: There are two types of tranfer of control.
A. Conditional Jumping
B. Unconditional Jumping

Unconditional Jumping: To jump from one part of a program to another part without any condition is called unconditional transfer of control or unconditional jumping.

Conditional jumping: To jump from one part of program to another part of a program when certain condition is satisfied or becomes true is called conditional transfer of control.

Question 2 Answer.
GOTO STATEMENT: The GOTO statement is an unconditional transfer of control statement which is used to jump from one part of a program to another without any condition.

ONGOTO: ON-GOTO statement is another unconditional transfer of control statement which is used to jump to one part of a program from several available options (parts).

Question 3 Answer.
IF-THEN-ELSE-STATEMENT: The IF-THEN-ELSE statement is another conditonal transfer of control statement. It is used to take one action if the condition is true, and take another action if the condition is false So, unlike IF-THEN statement it takes an action whether the condition is true or false.

Question 4 Answer.
ON-ERROR-GOTO-STATEMENT:
Purpsoe: ON-ERROR-GOTO statement is used to transfer of control to another part of a program when an error occurs.

Syntax: Line# ON ERROR GOTO line#.

Resume statement: Resume means to restart. “Resume statement” tranfers control back to the point where execution should resume after the detection and correction of error.

Question 5 Answer.
Loop: A loop is a set of statements which are executed repeatedly. The process to execute a set of statements repeatedly is called looping.

Types of loops:
There are two types of lopps in BASIC.
A. For Next loop
B. While – Wend loop

Question 6 Answer.
Nested loop: When one loop occurs within the body of another loop or one loop lyes inside another Loop, then it is called nested loop.

Computer full notes of class 10 chapter 3 Short And Long Questions End.

Computer full notes of class 10 chapter 4 starts

Short And Long Questions

Question 1 Answer.
Array: A subscripted variable that has upper and lower bands as its ending and starting positions and that subscripted value may range between these two bounds is called an Array.

Use of Array: Arrays are one of the most commonly used structures which are used in the computer proframming as a data structure for the manipulation and organization of huge amounts of data.

Types of Arrays: There are two types of Arrays.
A. One-Dimensional Array
B. Two-Dimensional Array.

One-Dimensional Array: A subscripted variable in which a single variable is used to represent the subscripts of the array and ranges between the lower and upper bounds of the array is called one-dimensional array. An exapmple of such arrays in the real life may be a matrix consisting of rows or columns only.

Two-Dimensional Array: A two dimensional array consists of two subscripts in which, the first subscripts represents the number of rows between the lower and upper bounds of rows values and the second represents the number of columns between the lower and upper bounds of column values.

Question 2 Answer.
DIM statement: Dim statement is used to declare an array.

OMITTING DIM STATEMENT: If the number of elements is 11 or less than 11 (in case of one-dimensional array) and 121 (11 rows and 11 array) then there is no need to declare the array by using DIM statement because BASIC accomplish this autumatically.

Computer full notes of class 10 chapter 4 Short And Long Questions End.

English full notes are also available check it out.

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