Class 12 Computer Science (083) Multiple Choice Questions (2023-24)- SOLVED #class12ComputerScience #eduvictors

Class 12 Computer Science (083) Multiple Choice Questions (2023-24)- SOLVED 

Q1. Which of the following is an invalid datatype in Python?

(a) Set 

(b) None 

(c) Integer 

(d) Real

Class 11 Informatics Practices - Introduction to Databases- Questions and Answers on MySQL (Part 1) #eduvictors #class11IP #class12IP #class11ComputerScience

 Class 11 Informatics Practices
Introduction to Databases
 Questions and Answers on MySQL
(Part 1)

Q1. What is database?

Answer: A database is an organized collection of data. The data are typically organized to model aspects of reality in a way that supports processes requiring this information. The term "database" can both refer to the data themselves or to the database management system.

Class 12 - Stacks in Python - Computer Science (Question and Answers) #cbseTerm2 #class12CoputerScience #PythonNotes #eduvictors

Class 12 - Stacks in Python - Computer Science (Question and Answers)

Q1: What is a data structure?

Answer: A data structure defines a mechanism to store, organise and access data along with operations (processing) that can be efficiently performed on the data.

Q2: What are the two main types of data structures?

Answer: 

1. Primitive Data Structure

2. Non-Primitive Data Structure

Worksheet on Database Management Systems - Class 10 / Class 11/Class 12 - Information Technology /Computer Science / Informatics Practices

Worksheet on Database Management Systems

Class 10 - Information Technology  

Class 11/Class 12 - Computer Science / Informatics Practices 

Directions: Fill in the blanks with suitable words.

1 _______ is a collection of related information.

2 _______ are the basic building blocks of a database. 

3 Table is also known as ________

4 In a table, columns are also called ________ and rows are called _________.

CBSE Class 12 - Computer Science/Informatics Practices - Python - A Quick Revision (#eduvictors)(#Class12ComputerScience)(#Class12InformaticsPractices)

Python - A Quick Revision

CBSE Class 12 - Computer Science / Informatics Practices

Q1: What is python?

Answer: Python is an object-oriented high-level computer language developed by Guido Van Rossum in 1990s. It was named after a British TV show namely ‘Monty Python’s Flying circus’.


Q2: What are the major advantages of Python language?

Answer: Python is a very powerful interpreted language (executes the code line by line at a time).
Some advantages of python are:
    Easy to use
    Expressive language
    Cross-platform
    Free and open sources

CBSE Class 12 - Computer Science Sample Question Paper + Solution- (2018-19)(#cbsepapers)(#eduvictors)

CBSE Class 12 - Computer Science
 Sample Question Paper + Solution- (2018-19)

Computing represents a convergence of operations that have been mechanized to varying stages in the past. Computer science is full of opportunities to be creative. Algorithms are solutions designed to solve problems. The Computer Science Examination is a three-hour-long that attempts to cover the material you would learn in a class 12 chemistry course.

Here follows the class 12  Computer Science sample question paper along with the marking scheme and answers for your assessment.

CBSE Class 12 - Computer Science - SQL Commands and Functions - Summary(#cbsenotes)(#eduvictors)

SQL Commands and Functions 

Summary

SQL (Structured Query Language) is a standardized language used to create, maintain, modify, and query relational databases. When a user wants to get some information from a database file, he can issue a SQL query.

Types of SQL commands OR Processing capabilities of SQL:
① Data Definition Language Commands (DDL Commands)
② Data Manipulation Language Command (DML Commands)
③ Transaction Control Language Command (TCL commands)
④ Data Control Language (DCL Commands)


DDL Commands
All the commands used to create, modify or delete physical structure of an object like a table. e.g., Create, Alter, Drop.

DML Commands
DML contains commands that can be used to manipulate the database objects and to query the databases for information retrieval.
e.g Select, Insert, Delete, Update etc.

TCL commands
TCL include commands to control the transactions in a database system. The commonly used commands in TCL are COMMIT, ROLLBACK etc.

Data Control Language (DCL)
This language is used for controlling the access to the data. Various commands like GRANT, REVOKE etc are available in DCL.

Class 9- 12/NTSE/CTET/Entrance Examination- Computer Awareness Quiz (#eduvictors)(#cbsenotes)

Computer Awareness Quiz

Here is a list of computer awareness based quizzes that help you prepare for various entrance examinations.

MCQs on Computer fundamentals and Computer awareness Quizzes links are provided here:

Computer Awareness Quiz

Computer Awareness Quiz Set-1

Computer Awareness Quiz Set-2

Computer Awareness Quiz Set-3

Computer Awareness Quiz Set-4

Windows Operating System Quiz

MS Office Quiz

Database Systems Quiz

Computer Fundamentals Quiz

Class 10 - Foundation of Information Technology - Chapter 01 - Internet Basics - Very Short Questions and Answers (#cbsenotes)(#eduvictors)

Internet Basics

Very Short Questions and Answers

Class 10 - Foundation of Information Technology

Question 1: Why is the Internet is so popular? 

Answer: Due to its extensible use and sharing of data, the Internet becomes so popular.


Question 2: Mention any two major uses of the Internet. 

Answer: The two major uses of the Internet are as follows:

1. For the students and educational purposes, the Internet is widely used to gather information so as to do the research.

2. We can send/receive the mail all over the world.


Question 3: Write two advantages of using the Internet.

Answer: Advantages of using the Internet are as follows:

1. It is used for communication, entertainment, searching for information and for providing many types of services.

2. It provides the facility of E-mail.

CBSE Class 12 - Computer Science - C++ Standard Headers - Questions and Answers (#cbsenotes)(#eduvictors)

 C++ Standard Headers

(Q & A)

Q1: What is the purpose of a header file in a program?

Answer: Header files provide function prototypes, definitions of library functions, declaration of data types and constants used

with the library functions.

Q2: What is the purpose of the following header files?

a) iostream.h b) stdio.h c) ctype.h

d) string.h e) math.h f) stdlib.h

Answer: 

iostream.h: Defines stream classes for input/output streams

stdio.h  : Standard input and output

ctype.h  : Character tests

string.h : String operations

math.h   : Mathematical functions such as sin() and cos()

stdlib.h : Utility functions such as malloc() and rand()

Entrance Exam/BCA/BBA/Class 11/Class 12 - Computer Awareness Quizzes (#eduvictors)(#cbsenotes)(#bcaentrance)

Computer Awareness Quizzes

Computer Awareness MCQs are available at eduvictors.com that may help you prepare for BCA/BBA entrance tests and Computer Science related examinations.

CBSE Class 12 - Final Examination Date Sheet - (2017-18) (#eduvictors)(#cbsenotes)

CBSE Class 12 - Final Examination Date Sheet - (2017-18)

CBSE Class 12 - Computer Science - Sample Question Paper - (2017-18) (#eduvictors)(#cbsepapers)

CBSE Class 12 - Computer Science -
Sample Question Paper - (2017-18)

CBSE Class 12 - Computer Science/ Informatics Practices - Database Concepts - Important Terms (#cbseNotes)

Basic Database concepts - Important Terms

Data:
Raw facts and figures which are useful to an organization. We cannot take decisions on the basis of data.


Information:
Well processed data is called information. We can take decisions on the basis of information.


Field:
Set of characters that represents specific data element.


Record:
Collection of fields is called a record. A record can have fields of different data types.


File:
Collection of similar types of records is called a file.


Data Model:
Data models capture the nature of and relationships among data and are used at different levels of abstraction as a database is conceptualized and designed.

CBSE Class 12 - Computer Science - C++ Practical Pointer Handling Snippet-13 Reverse Array of Strings (Pointers)

C++ Practical
Pointer Handling Snippet-13
Reverse Array of Strings (Pointers)  

Question: Suppose 7 names are stored in an array of pointers names[] as shown below:

char* names[] = {"Anand", "Naureen", "Banjot", "Wahid", "Sheena", "Shahid", "Sonakshi"};

Write a program to reverse the order of these names


Answer:

CBSE Class 10 - C++ Practical Pointer Handling Snippet-12 Swap Integers Using Pointers (#cbseNotes)

C++ Practical
Pointer Handling Snippet-12
Swap Integers Using Pointers 

Question: Write a function using pointers to swap two integers. *


Answer:

CBSE Class 12 - Computer Science - C++ Practical String Processing Snippet-11 Sub-String Handling (#cbseNotes)

C++ Practical
String Processing Snippet-11
Sub-String Handling 

Question: Write a substr() that will scan a string for the occurrence of a given sub-string
The prototype of the function would be:
    char* substr(char* str1, char* str2);
The function should return a pointer to the element in str1 where str2 begins.
If str2 does not occur in string1 then substr() should return a NULL
 e.g. if str1 = "Ena Meena Deeka" and str2 = "Meena"
then substr() should return address of 'M' in str1
write main() that uses the function substr()

Answer:

CBSE Class 12 - Computer Science - C++ Practical Binary File Processing Snippet-10 Copy Records (#cbseNotes)

C++ Practical
Binary File Processing Snippet-10
Copy Records 

Question: Given a binary file TELEPHON.DAT, containing records of the following class Directory

class Directory
  {
    char name[20];
    char address[30];
    char areacode[5];
    char phonenum[15];
    public:
      void register();
      void show();
      int checkcode(char AC[])
      { return strcmp(areadcpde, AC); }
   };

 Write a function COPYABC() in C++ that would copy all the records have areacode as "123" from TELEPHON.DAT to TELEBACK.DAT

Answer:

C++ Practical Text File Processing Snippet-9 - Count A Particular Word (#cbseNotes)

C++ Practical
Text File Processing Snippet-9
Count A Particular Word 

Question :  Write a function in C++ to print the count of the word "is" as an independent word in a text file DIALOG.TXT
e.g. if the content of the file is:
      "This is his book. Is this book good?"
then the output of the program should be 2

Answer:

CBSE Class 12 - C++ Practical Class Design and Binary File Handling - Snippet-7 (#cbseNotes)

C++ Practical
Class Design and Binary File Handling Snippet-7

Question :  Write a program in c++ to create a binary file and write objects of class BOOK to it and display them on screen after reading from the file.

Answer: