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Beginning Java EE 6 Platform with Glassfish 3: From Novice to Professional


   




Interview Questions and Answers for 'Platforms' - 16 question(s) found - Order By Newest

 Q1. What is cloud computing ?Cloud Computing2018-01-11 10:53:46

Ans. Cloud Computing is a way of using IT infrastructure with following traits -

1. On Demand Infrastructure
2. Broad Network Access
3. Resource Pooling
4. Rapid Elasticity
5. Measured Service

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   Like         Discuss         Correct / Improve     google cloud platform (GCP)  Amazon Web Services (AWS


  Q2. Write a method to check if input String is Palindrome?Core Java
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Ans. private static boolean isPalindrome(String str) {

if (str == null)
return false;

StringBuilder strBuilder = new StringBuilder(str);

strBuilder.reverse();

return strBuilder.toString().equals(str);

}

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   Like         Discuss         Correct / Improve     java   string   stringbuilder   stringbuilder   string class   code   palindrome     Asked in 38 Companies      Basic        frequent


 Q3. What are the platforms supported by Java Programming Language?Core Java
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Ans. Java runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX/Linux like HP-Unix, Sun Solaris, Redhat Linux, Ubuntu, CentOS, etc

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   Like         Discuss         Correct / Improve     java   jvm   platforms


 Q4. What is Java bytecode ?
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Ans. Java bytecode is the instruction set of the Java virtual machine. Each bytecode is composed by one, or two bytes that represent the instruction, along with zero or more bytes for passing parameters.

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   Like         Discuss         Correct / Improve     java   jvm   interpreter   platform independent     Asked in 1 Companies


 Q5. Is JVM a overhead ?
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Ans. Yes and No. JVM is an extra layer that translates Byte Code into Machine Code. So Comparing to languages like C, Java provides an additional layer of translating the Source Code.

C++ Compiler - Source Code --> Machine Code
Java Compiler - Source Code --> Byte Code , JVM - Byte Code --> Machine Code

Though it looks like an overhead but this additional translation allows Java to run Apps on all platforms as JVM provides the translation to the Machine code as per the underlying Operating System.


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   Like         Discuss         Correct / Improve     java   jvm   interpreter   platform independent   yes-no   advanced   architecture


 Q6. What is Byte Code ? Why Java's intermediary Code is called Byte Code ?
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Ans. Bytecode is a highly optimized set of instructions designed to be executed by the Java run-time system. Its called Byte Code because each instruction is of 1-2 bytes.

Sample instructions in Byte Code -

1: istore_1
2: iload_1
3: sipush 1000
6: if_icmpge 44
9: iconst_2
10: istore_2

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   Like         Discuss         Correct / Improve     java   jvm   interpreter   platform independent   byte code


 Q7. What is meant Java is "Write Once Run Anywhere" ?Core Java2017-05-07 15:14:51

Ans. It means that Java is compiled to byte code that is platform independent and hence can be run anywhere or any machine.

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   Like         Discuss         Correct / Improve     Write Once Run Anywhere  byte code  platform independent


 Q8. What is a platform ? Is Java a Software or Hardware platforms ?Core Java2017-05-13 08:59:23

Ans. Platform is the environment in which a program runs. Java provides a software platform for running JVM based applications and programs.

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   Like         Discuss         Correct / Improve     software platform


 Q9. Have you ever worked on Google Cloud Platform ?Google Cloud Platform2019-12-17 16:14:03

 This question is still unanswered. Can you please provide an answer.


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 Q10. Explain Virtual machines in Google Cloud Platform.Google Cloud Platform2020-01-06 11:37:29

 This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     Google cloud Platform  GCP


 Q11. Explain Identity management in GCP ?Google Cloud Platform2020-01-06 11:37:53

 This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     GCP


 Q12. How does cloud computing helps saves cost ?Cloud Computing2020-01-10 10:34:31

Ans. Cloud computing helps saving overall cost for infrastructure and service usage through following -

1. On demand Services and elasticity - You only pay for what you use. Less Ideal time.

2. Resource Pooling

3. Self Service - Less involvement of human resources

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   Like         Discuss         Correct / Improve     Google Cloud Platform (GCP)  Amazon Web Service (AWS


 Q13. Is Google App Engine , IAAS, PAAS or SAAS ?Google Cloud Platform (GCP)2020-01-10 10:47:39

Ans. It's PAAS ( Platform as a service )

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   Like         Discuss         Correct / Improve     Google App Engine


 Q14. What are the different types of Services GCP provides ?Google Cloud Platform (GCP)2020-01-10 11:01:37

Ans. Compute
Network
Storage
Big Data
Machine Learning

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 Q15. What is the difference between Billing Alerts and Budget Quotas in GCP ?Google Cloud Platform (GCP)2020-01-10 11:15:45

Ans. Alerts only let customer knows of any excessive usage whereas Quota restricts the usage beyond a certain point.

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   Like         Discuss         Correct / Improve     GCP Billing


 Q16. What are some GCP Billing and Budgeting services ?Google Cloud Platform (GCP)2020-01-10 11:27:55

Ans. Budgets and Alerts
Reports
Quotas

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   Like         Discuss         Correct / Improve     gcp billing



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