# Computer Science

## CBSE Board Class 12 Answer Key Computer Science 083

Computer Science 083 Term – II Answer Key Answer Key SECTION – A Question 1 – Answer LIFO, pop(), List.pop() Question 2 – Answer (i) VOiP = Voice Over Internet Protocol, PPP – Point-to-Point Protocol    (ii) PAN Question 3 – Answer Attribute – the columns of a relation are the attributes that are also […]

## Class 11 Computer Science Ch 10 Tuples and Dictionary in Python NCERT Book Exercise Solution

Chapter – 10 : Tuples and Dictionary Summary (A Quick Recap) • Tuples are immutable sequences, i.e., we cannot change the elements of a tuple once it is created. • Elements of a tuple are put in round brackets separated by commas. • If a sequence has comma separated elements without parentheses, it is also

## Class 11 Computer Science Ch 11 Societal Impacts NCERT Book Exercise Solution

Ch 11 Societal Impacts Summary (A quick recap) • Digital footprint is the trail of data we leave behind when we visit any website (or use any online application or portal) to fill-in data or perform any transaction. • A user of digital technology needs to follow certain etiquettes like net-etiquettes, communicationetiquettes and social media-etiquettes.

## Class 11 Computer Science Ch 9 Lists in Python NCERT Book Exercise Solution

Chapter – 9 : Lists Summary (A Quick Recap) • Lists are mutable sequences in Python, i.e., we can change the elements of the list. • Elements of a list are put in square brackets separated by comma. • A list within a list is called a nested list. • List indexing is same as

## Class 11 Computer Science Ch 8 Strings in Python NCERT Book Exercise Solution

Chapter – 8 : Strings Summary (A Quick Recap) • A string is a sequence of characters enclosed in single, double or triple quotes. • Indexing is used for accessing individual characters within a string. • The first character has the index 0 and the last character has the index n-1 where n is the

## Class 11 Computer Science Ch 7 Functions in Python NCERT Book Exercise Solution

Chapter – 7 : Functions in Python Summary (A Quick Recap) • In programming, functions are used to achieve modularity and reusability. • Function can be defined as a named group of instructions that are executed when the function is invoked or called by its name. Programmerscan write their own functions known as user defined

## Class 11 Computer Science Ch 6 Flow of Control NCERT Exercise Solution

Chapter – 6 : Flow of Control NCERT Book Exercise Solution Summary (A Quick Recap) • The if statement is used for selection or decision making. • The looping constructs while and for allow sections of code to be executed repeatedly under some condition. • for statement iterates over a range of values or a

## Class 12 Computer Science Ch 11 Data Communication NCERT Book Exercise Solution

Class 12 Computer Science Ch-11 Data Communication NCERT Book Exercise Solution (Scroll down to view the solution) A Quick Review – Summary • Data communication refers to the exchange of data between two or more networked or connected devices like laptops, PC, printers, routers etc. • Sender, receiver, messages, channel and protocols are major components

## Class 12 Computer Science Ch 10 Computer Network NCERT Book Exercise Solution

Class 12 Computer Science Ch-10 Computer Network NCERT Book Exercise Solution A Quick Review – Summary • A computer network is an interconnection among two or more computers or computing devices. • A computer network allows computers to share data and resources among each other. • Networking devices are used to connect multiple computers in

## Class 12 Computer Science Structured Query Language SQL NCERT Book Exercise Solution

Class 12 Computer Science Ch-9 Structured Query Language (SQL) NCERT Book Exercise Solution A Quick Review • Database is a collection of related tables. MySQL is a ‘relational’ DBMS. • DDL (Data Definition Language) includes SQL statements such as, Create table, Alter table and Drop table. • DML (Data Manipulation Language) includes SQL statements such

## Class 12 Computer Science Chapter 8 Database Concepts NCERT Exercise Solution

Quick Review – Summary File : A file in a file system is a container to store data in a computer.Disadvantage of File System : File system suffers from Data Redundancy, Data Inconsistency, Data Isolation, Data Dependence and Controlled Data sharing.DBMS : Database Management System (DBMS) is a software to create and manage databases. A

Class 12 Computer Science 083 Term 1 Examination Question Paper with Answer Key Download pdf CBSE Term 1 Examination Computer Science Question Paper – Code 083 Download Pdf Answer Key 1. B, D 2. C 3.  D 4 . C 5. C 6.  C 7. D 8. C 9. B 10. D 11. A 12.

## Class 12 Computer Science File Handling in Python MCQs Set 9

Python File Handling File Handling in Python MCQ’s Set – 9 Multiple Choice Questions Directions (Q.No 161-166) : Solve the question 161 to 166, to complete the function CountRec() A file “STUDENT.DAT” has structure (admission_number, Name, Percentage). A function countrec() in Python that would read contents of the file “STUDENT.DAT” and display the details of

## Class 12 Computer Science File Handling in Python MCQs Set 8

Python File Handling File Handling in Python MCQ’s Set – 8 Multiple Choice Questions Directions (Question Number 141 to 143) : Sumit want to write a list in file “test.dat” file. He has written some codes, but it is not complete. Complete these statements. Code is given below. 141. Write the valid alias name of

## Class 12 Computer Science File Handling in Python MCQs Set 7

Python File Handling File Handling in Python MCQ’s Set – 7 Multiple Choice Questions 121. The full name of a file or a directory is also called ________. a) folder name b) path c) pathname d) None of these 122. The _____ are from the topmost level of the directory structure. a) absolute paths b)

## Class 12 Computer Science File Handling in Python MCQs Set 6

Python File Handling File Handling in Python MCQ’s Set – 6 Multiple Choice Questions Answer Que Number 101 to 105 on the basis of given instructions and code. Your teacher has given you a method/function FilterWords() in python which read lines from a text file NewsLetter.TXT, and display those words, which are lesser than 4

## Class 12 Computer Science File Handling in Python MCQs Set 5

Python File Handling File Handling in Python MCQ’s Set – 5 Multiple Choice Questions 81. Find the output of the given code . a) anjeev b) 6 c) six d) None of these 82. Find the output of the given code . a) 23456 b) 5 c) Error d) None of these 83. Find the

## Class 12 Computer Science File Handling in Python MCQs Set 4

Python File Handling File Handling in Python MCQ’s Set – 4 Multiple Choice Questions 61. file_object.readline( ) How much bytes reads by the above statement? a) reads only one line at a time from the current cursor position b) reads only 20 bytes from current cursor position. c) Reads the entire file. d) None of

## Class 12 Computer Science File Handling in Python MCQs Set 3

Python File Handling File Handling in Python MCQ’s Set – 3 Multiple Choice Questions 41. The default file-open mode is ___________. a) read b) write c) append d) None of these 42. Write a command to open a file named “mybio.txt” in write mode? a) fileobject = open (“mybio.txt”, “w”) b) fileobject = open(“mybio.txt”) c)

## Class 12 Computer Science Python Functions – Working with Functions MCQs Set – 6

Python Functions – Working with Functions MCQ’s Multiple Choice Questions [MCQs] Set – 6 101. Find the output: a) 64 36 16 4 b) 49 25 9 1 c) 7 5 3 1 d) None of these 102. Find the output: a) 6 13 12 b) 2 5 10 c) 12 13 6 d) None