Subject

Computer and Communication Technology

Class

CBSE Class 12

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

Download the PDF Sample Papers Free for off line practice and view the Solutions online.
Advertisement

 Multiple Choice QuestionsShort Answer Type

Advertisement

21.

Considering the following definition of class FACTORY, write a method in Python to search and display the content in a pickled file FACTORY.DAT,where FCTID is matching with the value '105'.

class Factory:
	def __init__(self,FID,FNAM):
		self.FCTID = FID # FCTID Factory ID
		self.FCTNM = FNAM # FCTNM Factory Name
		self.PROD = 1000 # PROD Production
	def Display(self):
		print self.FCTID,':',self.FCTNM,':',self.PROD


import pickle
def ques4c( ):
	f=Factory( )
	file=open('FACTORY.DAT','rb')
	try:
		while True:
			if=pickle.load(file)
			if f.FCTID==105:
				f.Display()
			except EOF Error:
				pass
	file.close()
116 Views

Advertisement
22.

Observe the following table MEMBER 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.

NO MNAME STREAM
M001 JAYA SCIENCE  
M002 ADIYTA HUMANITIES 
M003 HANSRAJ SCIENCE
M004 SHIVAK COMMERCE

RESULT

NO MNAME  STREAM
M002  ADIYTA HUMANITIES 
96 Views

23.

State DeMorgan’s Laws of Boolean Algebra and verify them using truth table.

91 Views

24.

Draw the Logic Circuit of the following Boolean Expression using only NOR Gates:
( A+B).(C+D)

70 Views

Advertisement
25.

Derive a Canonical POS expression for a Boolean function G, represented by the following truth table:

X Y X G(X,Y,Z) 
0 0 0 0
0 0 1 0
0 1 0 1
0 1 1 0
1 0 0 1
1 0 1 1
1 1 0 0
1 1 1 1
86 Views

26.

Reduce the following Boolean expression to its simplest form using K-Map:
E(U,V,Z,W)= Σ (2,3,6,8,9,10,11,12,13)

65 Views

27.

Differentiate between communication using Optical Fiber and Ethernet Cable in context of wired medium of communication technologies.

87 Views

 Multiple Choice QuestionsLong Answer Type

28.

Write SQL queries for (i) to (iv) and find outputs for SQL queries (v) to (viii), which are based on the tables.

DVD

DCODE  DTITLE   DTYPE 
F101 Henry Martin  Folk
C102 Dhrupad Classical
C101 The Planets Classical
F102 Universal Soldier Folk
R102 A day in life Rock


MEMBER

MID

NAME

DCODE

ISSUEDATE

101

AGAM SINGH

R102

2017-11-30

103

ARTH JOSEPH

F102

2016-12-13

102

NISHA HANS

C101

2017-07-24

  1. To display all details from the table MEMBER in descending order of ISSUEDATE.
  2. To display the DCODE and DTITLE of all Folk Type DVDs from the table DVD.
  3. To display the DTYPE and number of DVDs in each DTYPE from the table DVD.
  4. To display all NAME and ISSUEDATE of those members from the table MEMBER who have DVDs issued (i.e ISSUEDATE) in the year 2017.
  5. SELECT MIN(ISSUEDATE) FROM MEMBER;
  6. SELECT DISTINCT DTYPE FROM DVD;
  7. SELECT D.DCODE,NAME,DTITLE
  8. FROM DVD D, MEMBER M WHERE D.DCODE=M.DCODE; SELECT DTITLE FROM DVD
  9. WHERE DTYPE NOT IN ( ' Folk ' , ' Classical ' );

 

145 Views

Advertisement
29.

Hi Standard Tech Training Ltd is a Mumbai based organization which is expanding its office set-up to Chennai. At Chennai office compound, they are planning to have 3 different blocks for Admin, Training and Accounts related activities. Each block has a number of computers, which are required to be connected in a network for communication, data and resource sharing.

As a network consultant, you have to suggest the best network related solutions for them for issues/problems raised by them in (i) to (iv), as per the distances between various blocks/locations and other given parameters.

Hi Standard Tech Training Ltd is a Mumbai based organization which is

Shortest distances between various blocks/locations:

 

Admin Block to Account Block 300 meters
Accounts Block to Training Block  150 meters
Admin Block to Training Block 200 meters
MUMBAI Head Office to CHENNAI Office 1300 KM

Number of computers installed at various blocks are as follows:

Training Block  150  
Accounts Block 30
Admin Block 40

(i) Suggest the most appropriate block/location to house the SERVER in the CHENNAI office (out of the 3 blocks) to get the best and effective connectivity. Justify your answer.
(ii) Suggest the best wired medium and draw the cable layout (Block to Block) to efficiently connect various blocks within the CHENNAI office compound.
(iii) Suggest a device/software and its placement that would provide data security for the entire network of the CHENNAI office.
(vi) Suggest a device and the protocol that shall be needed to provide wireless Internet access to all smartphone/laptop users in the CHENNAI office.

110 Views

Advertisement