Tag: java

Questions Related to java

Where is metadata stored in MySQL?

java

  1. In the MySQL databasemetadata

  2. In the MySQL databasemetasql

  3. In the MySQL databasemysql

  4. None of the above is correct.

Show answer
Correct Option: C

Which JDBC driver Type(s) can be used in either applet or servlet code?

java

  1. Both Type 1 and Type 2

  2. Both Type 1 and Type 3

  3. Both Type 3 and Type 4

  4. Type 4 only

Show answer
Correct Option: C

AI Explanation

To answer this question, we need to understand the different types of JDBC drivers and their compatibility with applet and servlet code.

Option A) Both Type 1 and Type 2 - This option is incorrect because neither Type 1 nor Type 2 JDBC drivers can be used in either applet or servlet code.

Option B) Both Type 1 and Type 3 - This option is incorrect because although Type 1 JDBC drivers can be used in applet or servlet code, Type 3 JDBC drivers cannot.

Option C) Both Type 3 and Type 4 - This option is correct because both Type 3 and Type 4 JDBC drivers can be used in either applet or servlet code.

Option D) Type 4 only - This option is incorrect because Type 4 JDBC drivers can be used in applet or servlet code, but it is not the only type that can be used.

The correct answer is C) Both Type 3 and Type 4. This option is correct because both Type 3 and Type 4 JDBC drivers can be used in either applet or servlet code.

What is sent to the user via HTTP, invoked using the HTTP protocol on the user's computer, and run on the user's computer as an application?

java

  1. A Java application

  2. A Java applet

  3. A Java servlet

  4. None of the above is correct.

Show answer
Correct Option: B

AI Explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) A Java application - This option is incorrect because a Java application is typically executed on a server and not sent to the user's computer via HTTP.

Option B) A Java applet - This option is correct because a Java applet is sent to the user's computer via HTTP, invoked using the HTTP protocol, and run on the user's computer as an application.

Option C) A Java servlet - This option is incorrect because a Java servlet is executed on a server and not sent to the user's computer via HTTP.

Option D) None of the above is correct - This option is incorrect because option B, a Java applet, is the correct answer.

The correct answer is B) A Java applet. This option is correct because it is sent to the user via HTTP, invoked using the HTTP protocol on the user's computer, and run on the user's computer as an application.

What isnottrue of a Java bean?

java

  1. There are no public instance variables.

  2. All persistent values are accessed using getxxxand setxxxmethods.

  3. It may have many constructors as necessary.

  4. All of the above are true of a Java bean.

Show answer
Correct Option: C

A JSP is transformed into a(n):

java

  1. Java applet.

  2. Java servlet.

  3. Either 1 or 2 above.

  4. Neither 1 nor 2 above.

Show answer
Correct Option: B

AI Explanation

To answer this question, you need to understand the role of JSP (JavaServer Pages) and its transformation process.

JSP is a technology used to create dynamic web pages. It allows developers to embed Java code within HTML pages, which is then executed on the server side. JSP pages are transformed into Java servlets during the compilation process.

Option A) Java applet - This option is incorrect because JSP pages are not transformed into Java applets. Java applets are client-side programs that run within a web browser and are embedded within HTML pages.

Option B) Java servlet - This option is correct. JSP pages are transformed into Java servlets. Servlets are server-side programs that run on a web server and generate dynamic content to be sent back to the client.

Option C) Either 1 or 2 above - This option is incorrect because JSP pages are specifically transformed into Java servlets and not Java applets.

Option D) Neither 1 nor 2 above - This option is incorrect. JSP pages are transformed into Java servlets, so option D is not the correct answer.

The correct answer is B) Java servlet. This option is correct because JSP pages are transformed into Java servlets during the compilation process.

Which JDBC driver Type(s) can you use in a three-tier architecture and if the Web server and the DBMS are running on the same machine?

java

  1. Type 1 only

  2. Type 2 only

  3. Both Type 3 and Type 4

  4. All of Type 1, Type 2, Type 3 and Type 4

Show answer
Correct Option: D

What programming language(s) or scripting language(s) does Java Server Pages (JSP) support?

java

  1. VBScript only

  2. Jscript only

  3. Java only

  4. All of the above are supported

Show answer
Correct Option: C

AI Explanation

To answer this question, you need to understand what Java Server Pages (JSP) is and the programming languages or scripting languages it supports.

Java Server Pages (JSP) is a technology used for developing web applications. It allows for the dynamic generation of web pages based on Java code. JSP files are HTML files with embedded Java code.

The correct answer is C) Java only. JSP supports only the Java programming language. It allows developers to embed Java code directly into the HTML code of the JSP file. This embedded Java code can be used to generate dynamic content, perform calculations, access databases, and more.

Options A) VBScript only and B) Jscript only are incorrect because JSP does not support these scripting languages. JSP is specifically designed to work with Java.

Option D) All of the above are supported is incorrect because JSP does not support VBScript or Jscript.

Therefore, the correct answer is C) Java only.

What servlet processor was developed by Apache Foundation and Sun?

java

  1. Apache Tomcat

  2. Apache Web server

  3. Sun servlet processor

  4. None of the above is correct.

Show answer
Correct Option: A

AI Explanation

To answer this question, you need to understand the concept of servlet processors and the technologies developed by Apache Foundation and Sun.

Option A) Apache Tomcat - This option is correct. Apache Tomcat is a servlet container developed by the Apache Foundation in collaboration with Sun Microsystems. It is an open-source software implementation of the Java Servlet, JavaServer Pages (JSP), and WebSocket technologies.

Option B) Apache Web server - This option is incorrect. Apache Web server, also known as Apache HTTP Server, is a web server software developed by the Apache Software Foundation. While it can be used to serve static web pages, it is not specifically designed as a servlet processor.

Option C) Sun servlet processor - This option is incorrect. While Sun Microsystems, now Oracle Corporation, has contributed to the development of Java technologies, there is no specific servlet processor named "Sun servlet processor."

Option D) None of the above is correct - This option is incorrect. The correct answer is Apache Tomcat, which is the servlet processor developed by the Apache Foundation and Sun Microsystems.

The correct answer is A) Apache Tomcat. This option is correct because Apache Tomcat is the servlet processor developed by the Apache Foundation and Sun Microsystems.

What is invoked via HTTP on the Web server computer when it responds to requests from a user's Web browser?

java

  1. A Java application

  2. A Java applet

  3. A Java servlet

  4. None of the above is correct.

Show answer
Correct Option: C

How many copies of a JSP page can be in memory at a time?

java

  1. One

  2. Two

  3. Three

  4. Unlimited

Show answer
Correct Option: A