Class 11th Chapter :- 10 Working with table

Primary key
The table which contains primary key is known as master table.

Foreign key
It can be defined as field or combination of fields whose values are borrowed from another table. Foreign key field cannot contain a value that does not exist in its related primary key field.

Conceptually there can be three major types of relationship between any tables of the database.
• One to One
• One to Many
Many to Many

Base has very important and interesting feature called Field Properties. Field properties determine how the values in the field are stored and displayed.

Default value: Many times it may happen, that we want to store some predefined default value automatically in a particular field at the time of entering a new record in the table.

Choose the most appropriate option from those given below :

(1) Which of the following operations cannot be performed on a record in database?
(a) Insert
(b) Delete
(c) Hide
(d) Update

(2) Which of the following represents maximum levels of sorting provided by Base
Wizard?

(a) 3
(b) 4
(c) 5
(d) 6

(3) Which of the following refers to data redundancy?
(a) Deletion of data
(b) Repetition of data
(c) Decomposition of tables
(d) Relationships of tables

(4) Given a relation, Teacher Subject (Tcode, Scode, Standard), which of the following
fields can be an appropriate foreign key field?

(a) Tcode
(b) Scode
(c) Tcode,Standard
(d) Tcode, Scode

(5) Which of the following statement is incorrect?
(a) Every table must have a primary key.
(b) Primary key can be combination of fields.
(c) Data type of Primary key and Foreign key should be same.
(d) Names of Primary key and Foreign key should be same.

(6) Which of the following type of relationship exists between Student and Teacher in
a school?

(a) One to One
(b) One to Many
(c) Many to Many
(d) No relationship exists

(7) Which of the following type of relationship exists between Student and Class Teacher
in a school?

(a) One to One
(b) One to Many
(c) Many to Many
(d) No relationship exists

(8) Which of the following options are possible to implement referential integrity?
(a) No Action
(b) Set Null
(c) Delete table
(d) Update Cascade

(9) Auto Value property can be set for field with which of the following datatype?

(a) Text
(b) Image
(c) Integer
(d) Boolean

(10) Which of the following statement is true for Default field property in Base?
(a) Default value can be numeric value only.
(b) Default value once set can be changed later.
(c) Default value cannot be greater than 500.
(d) Default value should be greater than value set in Length.

(11) Which of the following property is equivalent to NOT NULL?
(a) Length
(b) Default
(c) Required
(d) Format

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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