Best SQL Interview Questions
We have SQL and Python Interview. Questions taken from the top tech companies and universities to help you prepare for interviews . 500+. Page 3. OVERVIEW.
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How to prepare for an SQL interview?
The above questions will help you to prepare for an SQL interview and get an idea of what type of questions are asked. You can also go for a certification course to improve your skills and knowledge. Naukri Learning offers a plethora of online database courses to help you become an expert and crack the interviews easily.
Will SQL come up during a data analyst job interview?
As you prepare to interview for data analyst jobs, you can expect that SQL will come up during the job interview process. With this guide, you’ll learn more about SQL technical screenings, what type of screening you might encounter, and some common types of questions that come up during these interviews.
Are SQL skills necessary for a job?
RDBMS is one of the most commonly used databases to date, and therefore SQL skills are indispensable in most of the job roles. In this SQL Interview Questions article, I will introduce you to the most frequently asked questions on SQL (Structured Query Language).
How many SQL jobs are on LinkedIn?
At the time of writing, more than 230,000 jobs on LinkedIn included SQL in the listing. Since it’s such a critical skill, it’s common for data analyst interviews to include a SQL technical screening. This portion of the interview tasks you with solving real-world problems using SQL.
Java Interview QuestionsiJava Interview Questions
Java Interview QuestionsiiContents
1 Object Oriented Programming (OOP)1
1.1 Encapsulation
11.2 Polymorphism
11.3 Inheritance
11.4 Abstraction
21.5 Differences between Abstraction and Encapsulation
22 General Questions about Java3
2.1 What is JVM ? Why is Java called the Platform Independent Programming Language?
32.2 What is the Difference between JDK and JRE ?
32.3 What does the "static" keyword mean ? Can you override private or static method in Java ?
32.4 Can you access non static variable in static context ?
32.5 What are the Data Types supported by Java ? What is Autoboxing and Unboxing ?
42.6 What is Function Overriding and Overloading in Java ?
42.7 What is a Constructor, Constructor Overloading in Java and Copy-Constructor
42.8 Does Java support multiple inheritance ?
42.9 What is the difference between an Interface and an Abstract class ?
42.10 What are pass by reference and pass by value ?
53 Java Threads6
3.1 What is the difference between processes and threads ?
63.2 Explain different ways of creating a thread. Which one would you prefer and why ?
63.3 Explain the available thread states in a high-level.
63.4 What is the difference between a synchronized method and a synchronized block ?
73.5 How does thread synchronization occurs inside a monitor ? What levels of synchronization can you apply ?
73.6 What"s a deadlock ?
73.7 How do you ensure that N threads can access N resources without deadlock ?
7Java Interview Questionsiii4 Java Collections8
4.1 What are the basic interfaces of Java Collections Framework ?
84.2 Why Collection doesn"t extend Cloneable and Serializable interfaces ?
84.3 What is an Iterator ?
84.4 What differences exist between Iterator and ListIterator ?
84.5 What is difference between fail-fast and fail-safe ?
94.6 How HashMap works in Java ?
94.7 What is the importance of hashCode() and equals() methods ?
94.8 What differences exist between HashMap and Hashtable ?
94.9 What is difference between Array and ArrayList ? When will you use Array over ArrayList ?
94.10 What is difference between ArrayList and LinkedList ?
104.11 What is Comparable and Comparator interface ? List their differences.
104.12 What is Java Priority Queue ?
104.13 What do you know about the big-O notation and can you give some examples with respect to different data
structures ? 104.14 What is the tradeoff between using an unordered array versus an ordered array ?
104.15 What are some of the best practices relating to the Java Collection framework ?
114.16 What"s the difference between Enumeration and Iterator interfaces ?
114.17 What is the difference between HashSet and TreeSet ?
115 Garbage Collectors12
5.1 What is the purpose of garbage collection in Java, and when is it used ?
125.2 What does System.gc() and Runtime.gc() methods do ?
125.3 When is the finalize() called ? What is the purpose of finalization ?
125.4 If an object reference is set to null, will the Garbage Collector immediately free the memory held by that object ?
125.5 What is structure of Java Heap ? What is Perm Gen space in Heap ?
125.6 What is the difference between Serial and Throughput Garbage collector ?
135.7 When does an Object becomes eligible for Garbage collection in Java ?
135.8 Does Garbage collection occur in permanent generation space in JVM ?
136 Exception Handling14
6.1 What are the two types of Exceptions in Java ? Which are the differences between them ?
146.2 What is the difference between Exception and Error in java ?
146.3 What is the difference between throw and throws ?
146.4 What is the importance of finally block in exception handling ?
146.5 What will happen to the Exception object after exception handling ?
146.6 How does finally block differ from finalize() method ?
15Java Interview Questionsiv7 Java Applets16
7.1 What is an Applet ?
167.2 Explain the life cycle of an Applet.
167.3 What happens when an applet is loaded ?
167.4 What is the difference between an Applet and a Java Application ?
167.5 What are the restrictions imposed on Java applets ?
167.6 What are untrusted applets ?
177.7 What is the difference between applets loaded over the internet and applets loaded via the file system ?
177.8 What is the applet class loader, and what does it provide ?
177.9 What is the applet security manager, and what does it provide ?
178 Swing18
8.1 What is the difference between a Choice and a List ?
188.2 What is a layout manager ?
188.3 What is the difference between a Scrollbar and a JScrollPane ?
188.4 Which Swing methods are thread-safe ?
188.5 Name three Component subclasses that support painting.
188.6 What is clipping ?
188.7 What is the difference between a MenuItem and a CheckboxMenuItem ?
188.8 How are the elements of a BorderLayout organized ?
198.9 How are the elements of a GridBagLayout organized ?
198.10 What is the difference between a Window and a Frame ?
198.11 What is the relationship between clipping and repainting ?
198.12 What is the relationship between an event-listener interface and an event-adapter class ?
198.13 How can a GUI component handle its own events ?
198.14 What advantage do Java"s layout managers provide over traditional windowing systems ?
198.15 What is the design pattern that Java uses for all Swing components ?
199 JDBC20
9.1 What is JDBC ?
209.2 Explain the role of Driver in JDBC.
209.3 What is the purpose Class.forName method ?
209.4 What is the advantage of PreparedStatement over Statement ?
209.5 What is the use of CallableStatement ? Name the method, which is used to prepare a CallableStatement.
209.6 What does Connection pooling mean ?
21Java Interview Questionsv10 Remote Method Invocation (RMI)22
10.1 What is RMI ?
2210.2 What is the basic principle of RMI architecture ?
2210.3 What are the layers of RMI Architecture ?
2210.4 What is the role of Remote Interface in RMI ?
2210.5 What is the role of the java.rmi.Naming Class ?
2310.6 What is meant by binding in RMI ?
2310.7 What is the difference between using bind() and rebind() methods of Naming Class ?
2310.8 What are the steps involved to make work a RMI program ?
2310.9 What is the role of stub in RMI ?
2310.10What is DGC ? And how does it work ?
2310.11What is the purpose of using RMISecurityManager in RMI ?
2410.12Explain Marshalling and demarshalling.
2410.13Explain Serialization and Deserialization.
2411 Servlets25
11.1 What is a Servlet ?
2511.2 Explain the architechure of a Servlet.
2511.3 What is the difference between an Applet and a Servlet ?
2511.4 What is the difference between GenericServlet and HttpServlet ?
2511.5 Explain the life cycle of a Servlet.
2511.6 What is the difference between doGet() and doPost() ?
2611.7 What is meant by a Web Application ?
2611.8 What is a Server Side Include (SSI) ?
26quotesdbs_dbs17.pdfusesText_23
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