Mysql Interview Questions and Answers. MySQL questions are very usefull for freshers to learn easly. Learn Database Management System, purpose of. + Php+mysql Interview Questions and Answers, Question1: Who is the father of PHP and explain the changes in PHP versions? Question2: How can we. Today we're having a huge collection of MySQL interview questions to help both the freshers and experienced people searching for job.
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MySQL is an open source DBMS which is built, supported and distributed Top 50 MySQL Interview Questions & Answers .. Download PDF. MySQL is open source software which is available at any time and has no cost involved. MySQL is portable. GUI with command prompt. Administration is. Here is some most commonly asked interview qyestions collections about MySQL. Download Complete PHP Faqs in soundofheaven.info you are a PHP programmer or an.
You might be asked one of the in the future or similar to one of them. MyISAM is the default table that is based on the sequential access method. Sign Up or Log In using. If two rows will hawe the same value in col1 it will try to sort them according to col2 and so on. Learn More. Full Join would return rows when there is at least one match in the tables. IT Skills.
What does a special set of tags do in PHP? The output is displayed directly to the browser. If the specified file is included previous to the present call occurrence, it will not be done again. Once the Web server received the uploaded file, it will call the PHP script specified in the form action attribute to process them. PHP Interpreter treats numbers beginning with 0 as octal. Look at the similar PHP interview questions for more numeric problems.
How Can We Extract String "wisdomjobs. Second, the more secure the crypto is, the longer is the computation time to deliver the hash value. A high volume site might be significantly slowed down, if frequent md5 generation is required.
Database name: The major difference is the length of the hash generated. CRC32 is, evidently, 32 bits, while sha1 returns a bit value, and md5 returns a bit value. This is important when avoiding collisions. Yes, internally PHP will cast everything to the integer type, so numbers 10 and 11 will be compared.
And If Yes Then Why? If No Then Why? Session depends on browser. If browser is closed then session is lost. The session data will be deleted after session time out. If connection is lost and you recreate connection, then session will continue in the browser. PHP4 cannot support oops concepts and Zend engine 1 is used.
Can We Use Include abc. Yes we can include that many times we want, but here are some things to make sure of:. PHP and makeit. You can use functions: For this purpose, you can first read the data from one server into session variables. Then connect to other server and simply insert the data into the database. Rasmus Lerdorf. PHP 5.
Try this: The default session time in php is until closing of browser. An online payment gateway is the interface between your merchant account and your Web site.
It then passes the transaction off to your merchant bank for processing, commonly referred to as transaction batching. Here are the possible ways of php page redirection. Reply-to is where to delivery the reply of the mail. Return path is when there is a mail delivery failure occurs then where to delivery the failure notification.
The session support can be turned on automatically at the site level, or manually in each PHP page script:. Expression preceding the?
If the file is not found by require , it will cause a fatal error and halt the execution of the script. If the file is not found by include , a warning will be issued, but execution will continue. It opens the specified file, reads all characters in the file, and returns them in a single string.
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Health Care Skills. Finance Skills. All Courses. All Practice Tests. Set the cookie in past. Case Studio Smart Draw Question MySQL set can take zero or more values but at the maximum it can take 64 values Question Set char to occupy n bytes and it will take n bytes even if u r storing a value of n-m bytes Set varchar to occupy n bytes and it will take only the required space and will not use the n bytes eg.
There are many ways to accomplish the security tasks but the most common 7 ways are Validate Input. Never trust your user and always filter input before taking it to any operation. Provide access control. Turning off error reporting and exposing to the site for hackers. Instead use log file to catch exceptions Effective Data handling Question You should decide when to use temporary cookies and when to use persistent cookies based on their differences: Temporary cookies can not be used for tracking long-term information.
Persistent cookies can be used for tracking long-term information. Temporary cookies are safer because no programs other than the browser can access them. Persistent cookies are less secure because users can open cookie files see the cookie values. But require and include will do it as many times they are asked to do. Everything is passed by value. Here are three basic types of runtime errors in PHP: These are trivial, non-critical errors that PHP encounters while executing a script — for example, accessing a variable that has not yet been defined.
By default, such errors are not displayed to the user at all — although you can change this default behavior. These are more serious errors — for example, attempting to include a file which does not exist.
By default, these errors are displayed to the user, but they do not result in script termination. Fatal errors: These are critical errors — for example, instantiating an object of a non-existent class, or calling a non-existent function. Internally, these variations are represented by twelve different error types Question This will change the name of column: This will change the data type of a column: Data is stored in name. PHP5 supports oops concepts and Zend engine 2 is used.
Error supporting is increased in PHP5. Yes we can include that many times we want, but here are some things to make sure of: There are 2 ways to show some part of a text in red: There is at least 3 ways to logon to a remote server: The default session time in php is until closing of browser Question Make the following line uncomment like: It then passes the transaction off to your merchant bank for processing, commonly referred to as transaction batching Question Using Java script: The session support can be turned on automatically at the site level, or manually in each PHP page script: Turning on session support automatically at the site level: Set session.
Turning on session support manually in each page script: Size of the file: Job Recommendation Latest. Jobs in Meghalaya Jobs in Shillong.
View All Locations. Inner Join returns the rows if there is at least one match in both the tables. Left Join returns all the rows form the left table even if there is no match in the right table.
Right Join returns all the rows from the right table even if no matches exist in left table. Full Join would return rows when there is at least one match in the tables. Common MySQL functions are as follows: When the table is created, CHAR is used to define the fixed length of the table and columns. The length value could be in the range of Basically HEAP tables are in-memory and used for high speed temporary storages.
Learn MySql from Experts! Enrol Today. Storage tables are named as table types. The data is stored in the files using multiple techniques such as indexing, locking levels, capabilities and functions.
Primary key in MySQL is use to identify every row of a table in unique manner. For one table there is only one primary key. One of the candidate keys is the primary key and the candidate keys can be used to reference the foreign keys. Use of ENUM will limit the values that can go into a table.
For instance; the user can create a table giving specific month values and other month values would not enter into the table. Information that is provided on the slow query log could be huge in size.
The query could also be listed over thousand times. In such cases when the password is lost the user should start the DB with — skip-grants-table and then change the password. Thereafter with the new password the user should restart the DB in normal mode.
When the data disk is full and overloaded the way out is to create and soft link and move the. Therefore the process is usually slow. The process is faster in comparison. For this it is necessary reviewing the layered architecture and determining hardware and software configuration dependencies in respect of the application put to test.
While both are used to enforce uniqueness of the column defined but primary key would create a clustered index whereas unique key would create non-clustered index on the column. Transaction is logical unit of work where either all or none of the steps should be performed. BLOBs are binary large object holding huge data. Career-oriented Training.
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Learn for free! Subscribe to our youtube Channel. How and why use it? What are the features of MySQL? What is traditional Network Library for the system? What are the common MySQL functions?