CBSE > Class 11 > Computer Science | CBSE Board | Homework Help

A primary key must contain unique values. If the primary key consists of multiple columns, the combination of values in these columns must be unique. A primary key column cannot contain NULL values. It means that you have to declare the primary key column with the NOT NULL attribute. ... A table has only one primary key. Then FOREIGN KEY Constraint SQL FOREIGN KEY Constraint A FOREIGN KEY is a key used to link two tables together. A FOREIGN KEY is a field (or collection of fields) in one table that refers to the PRIMARY KEY in another table. The table containing the foreign key is called the child table, and the table containing the candidate key is called the referenced or parent table.

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How to capitalize all s letter in mississipi in python. Pls answer fast tomorrow is my c.s exam

Posted by Priya Dharshini ? 6 years, 6 months ago

CBSE > Class 11 > Computer Science

0 answers

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What is a structure

Posted by Ashish Sharma 6 years, 6 months ago

CBSE > Class 11 > Computer Science

2 answers

Ashish Sharma 6 years, 6 months ago

What the ****

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Soham Star 6 years, 6 months ago

Collection of heterogeneous data elements

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Imp chapter in ip class 11 plz reply fast after 2 day my paper is start

Posted by Ak Ak 6 years, 6 months ago

CBSE > Class 11 > Computer Science

2 answers

Priya Dharshini ? 6 years, 6 months ago

Important chapters are datahandiling,string,tupples,list,dictionary,mysql,datarepresentation,boolean logic

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Sanidhya Jadaun? 6 years, 6 months ago

Chapter 10 ,11,12 & 13 are very important chapters . They have important programming questions which usually comes in exam.so be prepared with these chapters......

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What is echo-printing ? What is guard code ?

Posted by Akshit Aggarwal 6 years, 6 months ago

CBSE > Class 11 > Computer Science

0 answers

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Convert (BE1)16 to binary

Posted by Aman Kant 6 years, 6 months ago

CBSE > Class 11 > Computer Science

1 answers

Akshit Aggarwal 6 years, 6 months ago

(101111100001)2

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Plzz give me sample paper of computer pseb board

Posted by Muskan Sekho 6 years, 6 months ago

CBSE > Class 11 > Computer Science

0 answers

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Write a program to accept 16 no in 2d array and then count total prime no. Present in each row individually

Posted by Avinash Kumar 6 years, 6 months ago

CBSE > Class 11 > Computer Science

0 answers

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Convert A6 to decimal

Posted by Aayushi Yadav 6 years, 6 months ago

CBSE > Class 11 > Computer Science

1 answers

Sanidhya Jadaun? 6 years, 6 months ago

166

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How to enter fibonacci series for n value of number

Posted by Medha Bhatt 6 years, 6 months ago

CBSE > Class 11 > Computer Science

2 answers

Sanidhya Jadaun? 6 years, 6 months ago

Condition : for(int i=2;i<n;i++)..{ n3=n1+n2;...cout<<n3;...n1=n2;...n2=n3;....}

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Sanidhya Jadaun? 6 years, 6 months ago

First take the value of n numbers from the user then assign the value of n1=0,n2=1, then print n1 & n2 in the order .Then take the below condition......................................for(int i=2 ; i<n ; i++)....{ n3=n1+n2;......cout<<n3;......n1=n2;......n2= n3;...}...................return 0; . . . . . .. . . . ..

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How to find the length of a string

Posted by Jayansh Chourasiya 6 years, 6 months ago

CBSE > Class 11 > Computer Science

1 answers

Prakhar J 6 years, 6 months ago

Using the function strlen () with the help of the header file ...........#include<string.h>......only for c++

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What are keywords

Posted by Pratham Shet 6 years, 6 months ago

CBSE > Class 11 > Computer Science

1 answers

Harsh Panchal 6 years, 6 months ago

A ward that tells you about the main idea or subject of something.??

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Differentiate between call by value and call by reference

Posted by Singh Rajput 6 years, 7 months ago

CBSE > Class 11 > Computer Science

1 answers

Saif Imam 6 years, 7 months ago

In call by value function create its own copy of argument and use them.Any change that are made in actual parameter that will not reflect back to formal parameter and vice versa. In call by reference instead of making a separate copy of value adress is passed.so changes in actual parameter reflect formal parameter and vice versa.

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What is oop?

Posted by Harshita Verma 6 years, 7 months ago

CBSE > Class 11 > Computer Science

2 answers

Prakhar J 6 years, 7 months ago

Object oriented programming is a method of implementation in which programs are organized as cooperative collections of objects,each of which represents an instance of some classes,and whose classes are all members of a hierarchy of classes united via inheritance relationship

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Prakhar J 6 years, 7 months ago

oop is object oriented programming

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What is the process of translation of algorithm into a program called ?

Posted by Shayok Mukherjee 6 years, 7 months ago

CBSE > Class 11 > Computer Science

1 answers

Piyush Mahajan 6 years, 7 months ago

Coding

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Name the standard input, output and error devices in c ++

Posted by Chaithra Samatha 6 years, 7 months ago

CBSE > Class 11 > Computer Science

1 answers

Prakhar J 6 years, 7 months ago

Cin ( console input) , cout ( console output) and cerr ( console error) are the standard devices in c++

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Which syllabus (old/new) i should study in computer science for exams.

Posted by Pratik Anand 6 years, 7 months ago

CBSE > Class 11 > Computer Science

1 answers

B.V.Dharunika Namagiri??? 6 years, 7 months ago

The new syllabus with python and it depends on the topic which school chooses for your exam but do stay updated.

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Full name of virus

Posted by Afira Rais 6 years, 7 months ago

CBSE > Class 11 > Computer Science

2 answers

Sarvang Kumar 6 years, 7 months ago

Vital information resource under siege

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Abhishek Rai 6 years, 7 months ago

Vital Information Resource Under System, I think. You should google it.

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What is msql

Posted by Gulshan Kayyum 6 years, 7 months ago

CBSE > Class 11 > Computer Science

1 answers

Piyush Mahajan 6 years, 7 months ago

A database management system

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Why we give this name C++ not ++C?? Interesting question.

Posted by Daksh Singh Nayal 6 years, 7 months ago

CBSE > Class 11 > Computer Science

2 answers

Augastin Lazar 6 years, 7 months ago

It is because c++ has every features in 'c' plus some additional features

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Garama Garam Indian 6 years, 7 months ago

Because ++c&c++ both operators has different value

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Which is good video lecture of c++ of class11

Posted by Harshit Paneri 6 years, 7 months ago

CBSE > Class 11 > Computer Science

1 answers

Priya Dharshini ? 6 years, 7 months ago

For python u can refer telusko. For c++ i dont know.

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Queries in SQL for changing the values in a column?

Posted by Medha Bhatt 6 years, 7 months ago

CBSE > Class 11 > Computer Science

1 answers

Shubham Dhiman 6 years, 7 months ago

Try update command

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Please send me 30 programs of python different chapter so please send me its very urgent

Posted by Shivam Sharma 6 years, 7 months ago

CBSE > Class 11 > Computer Science

2 answers

Abhishek Rai 6 years, 7 months ago

Use CS with python by Sumita Arora. It's a great book and will never despair you.

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Priya Dharshini ? 6 years, 7 months ago

R u kidding how can we send 30 programms. Pls check in google

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Write a program to calculate factorial of an integer

Posted by Anushka Gupta 6 years, 7 months ago

CBSE > Class 11 > Computer Science

1 answers

Prakhar J 1 year, 9 months ago

Using for loop and inside it use post decrement operator.......

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What is the useful of array

Posted by Deepesh Dhangar 6 years, 7 months ago

CBSE > Class 11 > Computer Science

1 answers

Prakhar J 6 years, 7 months ago

In one array we can assign a series of number by assigning the size of it. But if we compare to strings, we will have to take different strings to assign different numbers.

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In python which programming is done interpeter or compler

Posted by Vismit Kuranagi 6 years, 7 months ago

CBSE > Class 11 > Computer Science