Before getting into an example, we should know what singleton design pattern is. A singleton is a design pattern that restricts the instantiation of a class to only one instance. Notable uses include controlling concurrency and creating a central point of access for an application to access its data store.This ... Read More

Generally, the default behavior of map and multimap map is to store elements is in ascending order. But we can store element in descending order by using the greater function.The map in descending order:Functions are used here -m::find() – Returns an iterator to the element with key value ‘b’ in ... Read More

You can use subquery to order randomly and display name in asending order. The rand() is used for random, whereas ORDER BY is used to display name records in ascending order. The syntax is as follows −select *from (    select *from yourTableName order by rand() limit anyIntegerValue; ) anyVariableName ... Read More

To implement a keyword search in MySQL, you can use LIKE operator. The syntax is as follows −SELECT *FROM yourTableName where yourColumnName Like ‘%anyKeywordName%’ or yourColumnName Like ‘%anyKeywordName%’;To understand it further, let us first create a table. The following is the query to create a table −mysql> create table KeywordSearchDemo ... Read More

To begin auto increment from a specific point, use ALTER command. The syntax is as follows −ALTER TABLE yourTableName auto_increment = anySpecificPoint;To understand the above concept, let us create a table. The query to create a table is as follows −mysql> create table AutoIncrementSpecificPoint −> ( ... Read More

As per DIP package Intel 8257 DMA controller chip is a 40-pin programmable Integrated Circuit. The pin diagrams of physical and functional are indicated below. The DMA controller chip 8257 works in two modes namely −Slave Mode andMaster Mode.Likely the processor also works in two modes namely active mode and ... Read More

In this program we will see how to convert binary numbers to its BCD equivalent.Problem StatementA binary number is store dat location 800H. Convert the number into its BCD equivalent and store it to the memory location 8050H.DiscussionHere we are taking a number from the memory, and initializing it as ... Read More

In this program we will see how to search an element in a block of bytes using 8085.Problem StatementWrite 8085 Assembly language program to search a key value in a block of data using linear search technique.DiscussionIn this program the data are stored at location 8002H to 8007H. The 8000H ... Read More

We know from the study of the description of 8257 that it consists of 40 pins and the condition when it works in Slave Mode and Master mode. From the microprocessor point of view, the I/O port is a chip which is used exclusively for DMA control application and is ... Read More

In this program we will see how to convert BCD numbers to binary equivalent.Problem StatementA BCD number is stored at location 802BH. Convert the number into its binary equivalent andstore it to the memory location 802CH.DiscussionIn this problem we are taking a BCD number from the memory and converting it ... Read More