Gateway for Preparing Interviews
What is use of parseQueryString Parses a query string and builds a hashtable of key-value pairs, where the values are arrays of strings. The query string should have the form of a string packaged by the GET or POST method. What Class.forName will do while loading drivers It is used to create an instance of … Read more
What are the advantages of Web Services? The advantages of Web Services are: i. It is simple to build and supported by a variety of platforms. ii. It can extend its interface and add new methods without affecting the client’s operations. iii. It is stateless and firewall-friendly. What is Garbage collection? Garbage collection is used … Read more
What are the similarities between React and React Native? The most common similarities between React and React Native are: React Lifecycle Methods React Components React States and Props Redux Libraries What are the advantages of React Native? React Native provides many advantages for building mobile applications. Some of the essential benefits of using React Native … Read more
How to allow only registered users to comment on WordPress? If you don’t want a comment from a new user on your blog, check the option “Users must be registered and logged in to comment” from Discussions under the Settings option. How to reset password in WordPress? If you forget or lost the password of … Read more
Why 32 bit version of MongoDB are not preferred ? Because MongoDB uses memory mapped files so when you run a 32-bit build of MongoDB, the total storage size of server is 2 GB. But when you run a 64-bit build of MongoDB, this provides virtually unlimited storage size. So 64-bit is preferred over 32-bit. … Read more
What is PPC? PPC stands for pay-per-click. It is a type of search engine marketing in which you have to pay a fee each time your advertisement is clicked by an online user. Search engines like Google, Bing, etc., offer pay-per-click advertising on auction basis where the highest bidder gets the most prominent advertising space … Read more
What can javascript programs do? Generation of HTML pages on-the-fly without accessing the Web server. The user can be given control over the browser like User input validation Simple computations can be performed on the client’s machine The user’s browser, OS, screen size, etc. can be detected Date and Time Handling. What does the delete … Read more
What invokes a thread’s run() method After a thread is started, via its start() method or that of the Thread class, the JVM invokes the thread’srun() method when the thread is initially executed. When a thread is created and started, what is its initial state A thread is in the ready state after it has been created and started. How … Read more
What is the difference between the JDK 1.02 event model and the event-delegation model introduced with JDK 1.1? The JDK 1.02 event model uses an event inheritance or bubbling approach. In this model, components are required to handle their own events. If they do not handle a particular event, the event is inherited by (or … Read more
What is the use of SHOW option in IMP command? The SHOW option specifies when the value of show=y, the DDL within the export file is displayed. How to add foreign keys in MySQL? The foreign key is used to link one or more tables together. It matches the primary key field of another table … Read more