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Q1361. How can we enable promotion engine logs ?

IBM WCS

Ans. By making Debug=true within WCSPromotionEngineConfig.xml

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Q1362. What are the steps to create a new business policy ?

IBM WCS

Ans. Step 1 - Create a new policy definition by adding record in tables POLICY, POLICYDESC.
Step 3 - Associate commands to the new policy by adding records in POLICYCMD.
Step 2 - Associate the new policy with its terms and conditions by adding a record in relationship table POLICYTC.
Step 4 - Add reference to the policy in the repective contract xml file.

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Q1363. Define Business policy categories provided by WCS ?

IBM WCS

Ans. Catalog business policies

Catalog business policies define the scope and characteristics of the catalog of products for sale in a store including prices and the categorization of products in a store's catalog.

Payment business policies

Invoicing, payment, and refund business policies define how a store accepts payments, pays refunds, and the format of a store's invoices.

Returns business policies

Returns business policies define if refunds are accepted, the time period they are accepted for, and any re-stocking fees applied to returns.

Shipping business policies

Shipping business policies define the shipping providers a store can use and the charges associated with each type.

Referral interface business policies

Referral interface business policies define the relationship between a proxy store and a remote store.

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Q1364. Where do we specify the buyer seller relationship ?

IBM WCS

Ans. In the contract xml files.

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Q1365. Explain some of the features of Java ?

Core Java

Ans. Object Oriented - Java is object oriented but isn't purely object oriented as we have primitives along with objects.

Platform Independent - As JVM provides the translation to the Machine code as per the underlying Operating System.

Interpreted as well as compiled - Java files are compiled as class files and then class files are interpreted by JVM.

Runs on a Virtual Machine - Which is JVM that acts as an independent sub environment.

Multi-threaded - As applications can run on single thread as well as multi thread.

Modularity - Through usage of Classes , methods and Interfaces.

Robust

Usage in variety of Application types - Web , Gaming, BigData.

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Q1366. Name some of the Java Keywords ?

Core Java

Ans. Static , Final , Synchronized, private , public , protected, volatile, transient, super, this,import , abstract,native,default (effective java 8), new

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Q1367. Which operators in Java have highest precedence ?

Core Java

Ans. Braces, i.e () and [] have the highest precedence

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Q1368. Which class is the root class of all Exceptions in Java ?

Ans. Throwable

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Q1369. What is MAC Address ?

Networking

Ans. A media access control address is a unique identifier assigned to network interfaces for communications at the data link layer of a network segment. MAC addresses are used as a network address for most IEEE 802 network technologies, including Ethernet and Wi-Fi.

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Q1370. What is an exception and exception handling in Java ?

Core Java

Ans. An Exception in java is the occurrence during computation that is anomalous and is not expected.

Exception handling is the mechanism which is used to handle such situations.

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Q1371. What technical stuff you like to do in your free time ?

General

Ans. [Open Ended Answer]

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Q1372. What was the most difficult task in your last job ?

General

Ans. [Open Ended Answer]

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Q1373. What would you do if a customer asks you to make a change immediately that require some time for thinking and analysis ?

General

Ans. [Open Ended Answer]

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Q1374. What is a factory design pattern ?

Design

Ans. Factory Design Patterns is the pattern that recommends creation of separate Factory Object for creation of other object.

So its like saying - If you want to create an object of ClassA, Talk to FactoryObject ( which is an object of FactoryClass ). FactoryObject in itself encapsulates the inputs and logic required to make the decision regarding the creation and construction of object.

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Q1375. Given a 12-hour analog clock, compute in degree the smaller angle between the hour and minute hands

Ans. Zero Degree. Because the hour and minute hands overlap once in an hour.

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Q1376. How is hashcode calculated in java ?

or

What are the rules for hashcode calculation ?

Core Java

Ans. General contract of hashCode is:

1.Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer,

2.If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.

3.It is not required that if two objects are unequal according to the equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results.

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Q1377. Why main method is declared static ?

Core Java

Ans. static is the keyword that makes it accessible even without creating any object and using class name only. Making it non static would like creation of object upfront before calling the method.

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Q1378. What is Spring Security ?

Spring

Ans. Spring Security is a powerful and highly customizable authentication and access control framework. It is the de facto standard for securing Spring-based applications.

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Q1379. Create a Class Bank with the methods to deposit and Withdraw ?

Core Java

Ans. class Bank {
int balance;

Bank(){
balance = 0;
}

void deposit(int amount){
balance = balance amount;
}

int withdraw(int amount){
balance = balance - amount;
return balance;
}
}

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Q1380. Write code for LRU Cache

Core Java

Ans. https://www.geeksforgeeks.org/lru-cache-implementation/

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Q1381. Explain your experience with Java, spring and web services?

General

Ans. Have worked on Java 7 and Java 8, In Java 8 , Worked with streams , lambda expression and default methods.

Have worked on both Spring Mvc and Spring Boot, using Spring dependency injection, Rest services , AOP , JDBC and Hibernate integration.

Have worked on Rest services using Spring and Spring Boot. Have worked on SOAP web services too.

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Q1382. Can a constructor throw an exception ?

Core Java

Ans. Yes

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Q1383. Can constructor be synchronized in Java ?

Core Java

Ans. No, constructors can not be synchronized in Java. In fact using the keyword synchronized with a constructor results in compilation error.

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Q1384. Will finally run if we have return statement and it exits the method early ?

Core Java

Ans. finally will execute in all graceful situations - graceful executions as well as graceful exceptions. The only situation when finally block won't execute is when the app is abruptly stopped, killed or unplugged.

Sample Code for finally

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Q1385. Is there any relationship between Web.xml and Spring.xml ?

Spring

Ans. No, there is no relationship between web.xml and spring.xml but you have to configure spring.xml in web.xml in order initialize beans when application starts up

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Q1386. Why do you want to work here ?

General

Ans. I believe that the company would provide a good ground for my career growth and learning.

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Q1387. What are different ways for Servlet authentication ?

Java EE

Ans. HTTP Basic Authentication
HTTP Digest Authentication
HTTPS Authentication
Form Based Login

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Q1388. Why do you wan to stay in IT ?

General

Ans. Coding , Science and Mathematics has always fascinated me. I have curious mindset that continuously look for solutions.

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Q1389. How to make sure that no request are lost in client server application ?

Solution

Ans. By keeping some sort of storage at the client side for each request and then matching it up against the response received to make sure that the request was well received.

A queue can be used for this purpose.

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Q1390. Scale yourself on Java on the scale of 1 to 10

General

Ans. [Open Ended Answer]

The objective of the question is to check how efficient one is in the language so that appropriate level questions are asked. Don't tell too high number if you are being interviewed for a junior or mid level position as the interviewer may throw advance level questions.

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