Class 10th Chapter - 9 Promblem and Promblem Solving

Chapter -9

Computer can solve variety of problems from the easiest to the most complex ones.
To solve a problem it needs to be given a complete set of instructions.
We can solve any problem using the steps mentioned:

1. Define the problem.
2. Identify the input, output and constraint of the problem.
3. Identify different alternatives of solving the problem.
4. Choose the best possible alternative from the above list.
5. Prepare detailed stepwise instruction set of the identified alternative.
6. Compute results using this instruction set.
7. Check correctness of the answer obtained.
Steps 1 to 5 are performed by person who needs the solution, while step 6 and 7 are performed by a computer.

A flowchart is a technique in which we use pictorial representation of every action that we perform within the machine process that solves a problem.

A set of symbols, showing different actions, is used to represent a flowchart.

The symbols are also called components of flowcharts.

Start and End : The Start and End components are used to show the beginning and the end of a flowchart.
eg :-

Arrow : Observe that in both figure 9.1 and 9.2 we have shown arrows coming in and going out of the symbols
eg :-

Process : Process is the core part of any solution procedure. A process is actually, a sequence of actions
eg :-

Decision : A logical decision of a process is represented by a diamond shaped symbol as shown in figure 9.4. It is also called a test symbol.

Connector: A circle symbol is used to represent a connector. At times it is possible that a flowchart becomes to large to fit into a single page or it may not be possible to use an arrow to link two processes

1) Which of the following symbol is used to begin a flow chart ?

(a) ( Start)
(b) / Start
(C) Start Start
(d) Start

(2) Which of the following refers to a list of instructions in a proper order to solve a
problem called ?

(a) Algorithm
(b) Flowchart
(c) Sequence
(d) Roadmap

(3) Which of the following symbol is used to test conditions in a flowchart ?

(a) Diamond
(b) Circle
(c) Arrow
(d) Square

(4) Which of the following symbol is used to represent output in a flowchart ?

(a) Square
(b) Circle
(c) Parallelogram
(d) Triangle

(5) Which of the following is the standard terminal symbol for a flowchart ?

(a) Circle
(b) Diamond
(c) Rounded Rectangle
(d) Square

(6) Which of the following refers to the purpose of Algorithm and Flowchart ?

(a) Know the memory capacity
(b) Identify the base of the number system
(c) Direct the output to the printer
(d) Specify the problem completely and clearly

(7) Which of the following is not a problem solving technique ?

(a) Pseudo code
(b) Flowchart
(c) Algorithm
(d) Sequence

(8) Which of the following is a pictorial representation of a problem solving technique ?

(a) Pseudo code
(b) Flowchart
(c) Algorithm
(d) Computer program

(9)An arrow symbol in flowchart is used to show

(a) The flow of an action
(b) The sequence of action
(c) The start of actions
(d) The completion of an action

(10) Which of the following refers to the core part of any solution ?

(a) Input
(b) Output
(c) Process
(d) Algorithm

(11) Which of the following symbol represents a Process ?

(a) Rectangle
(b) Square
(c) Circle
(d) Diamond

(12) Which of the following is used to distinguish different connector pairs in flowchart ?

(a) Arrows are used
(b) Alphabets or other characters are used
(c) Circles are used
(d) Diamonds are

Link to download MCQ :-

1. Given the school result data, analyses the performance of the students on #different parameters, e.g subject wise or class wise.

1. Given the school result data, analyses the performance of the students on #different parameters, e.g subject wise or class wise. Solution :- # x-axis is shows the subject and y -axis # shows the markers in each subject # import pandas and matplotlib import pandas as pd import matplotlib.pyplot as plt # Simple Line Chart with setting of Label of X and Y axis, # title for chart line and color of line subject = ['Physic','Chemistry','Mathematics', 'Biology','Computer'] marks =[80,75,70,78,82] # To draw line in red colour plt.plot(subject,marks,'r',marker ='*') # To Write Title of the Line Chart plt.title('Marks Scored') # To Put Label At Y Axis plt.xlabel('SUBJECT') # To Put Label At X Axis plt.ylabel('MARKS') plt.show() Output :-

Class 10th Chapter 7 Functions in Calc

Functions in Calc Calc provide built-in standard functions for mathematical, logical, statistical, date and time, financial and other calculations on numbers and text. The process of inserting a function is similar for all functions.That is, to use a function we need to enter a correct spelling of the function along with necessary arguments. This is known as syntax of the functions. t is possible to loose the grip on it and easy to introduce errors. To avoid this, you may take help of function wizard. The Calc support some more functions that support logical decision making. These functions are AND, OR, and NOT. (1) In which of the following ways we can enter a function in Calc ? (a) Directly typing function name in a cell nan (b) Function wizard or selecting from tool bar (c) A and B both (d) Depends on functions (2) A function can start with which of the following options ? (a) '='sign (b) Alphabets (c) Numbers (d) Any of these (3) Which of the following is not a logical...

11. Write a Java program to input basic salary of an employee and calculate its Gross salary according to following:

11. Write a Java program to input basic salary of an employee and calculate its Gross salary according to following: Basic Salary <= 10000 : HRA = 20%, DA = 80% Basic Salary <= 20000 : HRA = 25%, DA = 90% Basic Salary > 20000 : HRA = 30%, DA = 95% Static Solution :- class salary { public static void main(String args[]) { double basic=20000.50,gross,da,hra; if(basic <=10000) { da = basic * 0.8; hra = basic *0.2; } else if(basic <=20000) { da = basic * 0.9; hra = basic *0.25; } else { da = basic * 0.95; ...

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