Gateway for Preparing Interviews
What are the main factors that can affect PPC bidding? Following are some factors that can affect PPC bidding: The budget of the advertiser. The time-span of advertisement. The popularity of the keyword. How competitive your keywords are
What is InputSplit in Hadoop? Explain. When a Hadoop job runs, it splits input files into chunks and assigns each split to a mapper for processing. It is called the InputSplit. What is a combiner in Hadoop? A Combiner is a mini-reduce process which operates only on data generated by a Mapper. When Mapper emits … Read more
What is the importance of hashCode() and equals() methods? How they are used in Java The java.lang.Object has two methods defined in it. They are – public boolean equals(Object obj) public int hashCode(). These two methods are used heavily when objects are stored in collections. There is a contract between these two methods which should … Read more
What are the different types of IoC (dependency injection There are three types of dependency injection: Constructor Injection(e.g. Spring): Dependencies are provided as constructor parameters. Setter Injection(e.g. Spring): Dependencies are assigned through JavaBeans properties (ex: setter methods). Interface Injection(e.g. Avalon): Injection is done through an interface. In your experience, why would you use Spring framework … Read more
What do you mean by automated testing? Testing by using software tools which execute test without manual intervention is known as automated testing. Automated testing can be used in GUI, performance, API, etc. How many test cases we can write in a day? We can tell anywhere between 2-5 test cases. First test case → … Read more
What is a SessionFactory? Is it a thread-safe object SessionFactory is Hibernate’s concept of a single datastore and is threadsafe so that many threads can access it concurrently and request for sessions and immutable cache of compiled mappings for a single database. A SessionFactory is usually only built once at startup. SessionFactory should be wrapped … Read more
What is required to become a data analyst? To become a data analyst, Robust knowledge on reporting packages (Business Objects), programming language (XML, Javascript, or ETL frameworks), databases (SQL, SQLite, etc.) Strong skills with the ability to analyze, organize, collect and disseminate big data with accuracy Technical knowledge in database design, data models, data mining … Read more
What is the difference between public and private key? The private key is used to encrypt or lock a message or transaction which is sent on the blockchain network. The sender can send a message using the public key of the receiver. On the other hand, the receiver can decrypt the message or the transaction … Read more
Explain the database system in Drupal. In Drupal database system, each type of information has its own database table. Different types of information will be stored in different database table. For example, nodes information is stored in nodes table. What are system requirements for Drupal installation? System requirements for Drupal 8: Web server: Apache, Nginx, … Read more
Name one advantage of JSP over Servlets Can contain HTML, JavaScript, XML and Java Code whereas Servlets can contain only Java Code, making JSPs more flexible and powerful than Servlets. However, Servlets have their own place in a J2EE application and cannot be ignored altogether. They have their strengths too which cannot be overseen. What … Read more