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TextBook Solutions for Uttarakhand Board Class 12 Computer And Communication Technology Computer Science With Python Chapter 8 Exception Handling & Generate Functions
Question 1
Write Addnew(Book) and Remove(Book) methods in Python to Add a new Book and Remove a Book from a List of Books, considering them to act as PUSH and POP operations of the data structure Stack.
Solution
class stack:
Book=[]
def Addnew(self):
Name=input('Enter Book Name :')
stack.Book.append(Name)
def Remove(self):
if (stack.Book==[]):
print 'Stack Empty'
else:
print 'Deleted Book is : ',stack.Book.pop()
Question 4
Observe the following table CANDIDATE carefully and write the name of the RDBMS operation out of (i) SELECTION (ii) PROJECTION (iii) UNION (iv) CARTESIAN PRODUCT, which has been used to produce the output as shown in RESULT ? Also,find the Degree and Cardinality of the RESULT.
TABLE: CANDIDATE
| No | NAME | STREAM |
| C1 | AJAY | LAW |
| C2 | ADITI | MEDICAL |
| C3 | ROHAN | EDUCATION |
| C4 | RISHAB | ENGINEERING |
RESULT
| No | NAME |
| C3 | ROHAN |
Easy
Question 5
Observe the following table carefully and write the names of the most appropriate columns, which can be considered as (i) candidate keys and (ii) primary key.
| Id | Product | Qty | Product | Transaction Date |
| 101 | Plastic Folder 12' | 100 | 3400 | 2014-12-14 |
| 104 | Pen Stand Standard | 200 | 4500 | 2015-01-31 |
| 105 | Stapler Medium | 250 | 1200 | 2015-02-28 |
| 109 | Punching Machine Big | 200 | 1400 | 2015-03-12 |
| 103 | Stapler Mini | 100 | 1500 | 2015-02-02 |
Easy
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