Interview Questions and Answers for 'L' | Search Interview Question

Interview Questions and Answers - Order By Newest

Q1991. Write a program to make an array act as a set.

Core Java

Ans. public Set convertArrayToList(T array[]) {
Set set = new HashSet<>(Arrays.asList(array));
return set;
}

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Q1992. Write a unit test case using java 8.

JUnit

Ans. public List convertAllToUpperCase(List words) {
return words.stream().map(String::toUpperCase).collect(Collectors.toList());
}

@Test
public void testAllToUpperCase() {
List expected = Arrays.asList("JAVA8", "STREAMS");
List result = convertAllToUpperCase(Arrays.asList("java8", "streams"));
assertEquals(expected, result);
}

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Q1993. How would you design the database schema for an event?

Database

Ans. Broad question, but if the company need velocity, think about use a NO SQL instead of regular SQL databases.

Also prefers materialized views instead of joins to fetch data quickly.

Regarding the database design, there are very good design tools for professional database (to develop proper indexes and good database design) one of the best is QuickDBD

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Q1994. What are your goals: personal, business, financial

General

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Q1995. What are the advantages and disadvantages of Lambda Expression ?

Core Java

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Q1996. When you build an angular application, what type of file it creates which we can deploy?

Angular JS

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Q1997. How you debug and troubleshoot slowness with a REST call?

Rest

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Q1998. Give an example of a time when someone provided critical feedback on your work

General

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Q1999. If you see bad code, would you rewrite it?

General

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Q2000. Can the value of a static variable be changed ?

Core Java

Ans. Yes the value of a static variable can be changed. It's the final keyword that restrict the modification of value not static.

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Q2001. Difference between XSS and CSRF ?

Security

Ans. SRF attack requires an authenticated session, whereas an XSS attack doesn’t.
XSS doesn’t require any user interaction.CSRF is restricted to the actions the victim can perform.
XSS requires a vulnerability to happen, whereas CSRF relies on tricking the user to click a link or access a page.
CSRF can only send an HTTP request but cannot view the response. XSS can send and receive HTTP requests and responses to extract the required data.

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Q2002. How can we create an arraylist of unique values ?

Core Java

Ans. We can put the value in a set to enforce uniqueness and then dum those value into an arraylist.

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Q2003. How do you evaluate a product while migrating to open source ?

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Q2004. Write a Program to find out negative numbers in a list.

Design

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Q2005. Which set of technologies do you use in your company ?

General

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Q2006. Difference between Let and Var in Javascript ?

JavaScript

Ans. Var scopes the variable to the nearest function whereas Let scopes the variable to nearest block.

For example -

function printNumbers() {
for(var i = 1; i < 3: i++){
console.log(i);
}

console.log(i); // works fine and will print 3 as i has a function scope and not local loop scope
}

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Q2007. What is the difference between Angular JS (version 1x) and Angular (version 2x) ?

Angular

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Q2008. What is HMR or Hot Module Replacement in Angular ?

Angular JS

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Q2009. What is arrow function in Typescript ?

TypeScript

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Q2010. Interface vs Abstraction

Core Java

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Q2011. Explain your current project architecture.

Architecture

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Q2012. Explain Servlet config

Java EE

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Q2013. What is the difference between field and property in Typescript ?

TypeScript

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Q2014. How to debug multi server deployed application ?

Debugging

Ans. Choose the server from the list of defined servers under J2EE Server.
Choose the project to debug.
Click Apply to save changes.
Click Debug to start the server and run the application.

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Q2015. What are the advantages of using TypeScript over Javascript ?

TypeScript

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Q2016. What do you think of TypeScript?

TypeScript

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Q2017. How to manage transactions in distributed applications?

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Q2018. What is the different between collection and Stream Api ?

Core Java

Ans. data under collection are actually stored in memory so that they can be retrieved when needed whereas data in streams are not stored and hence we need to construct it again when needed.

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Q2019. Have you ever done audit logging using log4j ?

Log4j

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Q2020. What will you do if your build fails and you need to fix it in an hour ?

Build Management

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