Big O is a language and metric for describing the efficiency of algorithms. en.wikipedia.org/wiki/Big_O_notation

Public domain image by Eric Rowell on Wikimedia Commons w.wiki/4ytE see also www.bigocheatsheet.com

Actual interviewing strategies and example questions. I need this. Actually, I used to read this woman's blog, but I never really utilized this book. I probably need to study for AT LEAST a month...

Cracking the Coding Interview – Unscripted Videos free download. In the Cracking the Coding Interview series, Danny is put through a full technical interview, including one behavioral and two technical questions: Watch as Danny designs a solution to these problems. Mid-video pop-ups will...

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Cracking the Coding Interview

www.crackingthecodinginterview.com

Cracking the Tech Career

www.crackingthetechcareer.com

Cracking the PM Interview: How to Land a Product Manager Job in Technology www.crackingthepmcareer.com

🔑 In this reel, I’ve explained **HashMap in Java** in the simplest way 🚀

What is HashMap?

⚡ How it stores key-value pairs

🔍 Why it’s faster than other collections

💡 Real-life examples for better understanding

Master HashMap and you’ll crack a lot of Java interview questions with ease 💯

💡 Java Interview Question:

👉 How can you find leap years using the Java Stream API?

This is a popular Java interview question to test your understanding of Streams and functional programming.

Here’s the clean Java code 👇

import java.util.List;

import java.util.stream.Collectors;

public class LeapYearStream {

public static void main(String[] args) {

List years = List.of(1999, 2000, 2004, 2010, 2020, 2023);

List leapYears = years.stream()

.filter(y -> (y % 4 == 0 && y % 100 != 0) || (y % 400 == 0))

.collect(Collectors.toList());

System.out.println(leapYears);

}

}

🎯 Explanation:

Stream processes a list of years one by one

filter() applies the leap year condition

A leap year is divisible by 4 and not by 100 OR divisible by 400

collect() gathers all leap years into a list

Clean, readable, and interview-friendly

✅ Perfect for:

✔️ Java Interviews

✔️ Java 8+ Stream API Learners

✔️ Backend Developers

✔️ Java + Spring Boot Developers

👉 Save this post for Java revision

👉 Follow @ashokitschool for more Java + SQL + Full Stack content

#JavaInterviewQuestions #JavaStreams #LeapYear #StreamAPI #BackendDeveloper #JavaDeveloper #SpringBoot #AshokIT #CodingInterview #LearnJava #ProgrammingTips #JobReadySkills #FullStackDeveloper

💡 Java Interview Question:

👉 How can you find leap years using the Java Stream API?

This is a popular Java interview question to test your understanding of Streams and functional programming.

Here’s the clean Java code 👇

import java.util.List;

import java.util.stream.Collectors;

public class LeapYearStream {

public static void main(String[] args) {

List years = List.of(1999, 2000, 2004, 2010, 2020, 2023);

List leapYears = years.stream()

.filter(y -> (y % 4 == 0 && y % 100 != 0) || (y % 400 == 0))

.collect(Collectors.toList());

System.out.println(leapYears);

}

}

🎯 Explanation:

Stream processes a list of years one by one

filter() applies the leap year condition

A leap year is divisible by 4 and not by 100 OR divisible by 400

collect() gathers all leap years into a list

Clean, readable, and interview-friendly

✅ Perfect for:

✔️ Java Interviews

✔️ Java 8+ Stream API Learners

✔️ Backend Developers

✔️ Java + Spring Boot Developers

👉 Save this post for Java revision

👉 Follow @ashokitschool for more Java + SQL + Full Stack content

#JavaInterviewQuestions #JavaStreams #LeapYear #StreamAPI #BackendDeveloper #JavaDeveloper #SpringBoot #AshokIT #CodingInterview #LearnJava #ProgrammingTips #JobReadySkills #FullStackDeveloper

Here’s the clean SQL query 👇

SELECT employee_id,

employee_name,

department_id

FROM employees

WHERE department_id IN (

SELECT department_id

FROM departments

WHERE location = 'HYDERABAD'

);

🎯 Explanation:

The subquery executes first and returns a list of department_ids

The outer query filters employees whose department_id matches that list

The subquery is non-correlated (it does not depend on the outer query)

IN is used when the subquery returns multiple values

Clean and easy to read — very common in interviews

✅ Perfect for:

✔️ SQL Interviews

✔️ Backend Developers

✔️ Java + Spring Boot Learners

✔️ Data Analysts

✔️ Reporting & Business Queries

👉 Save this post for SQL revision

👉 Follow @ashokitschool for more SQL + Java + Full Stack content

#SQLInterviewQuestions #SQLTips #INOperator #SubquerySQL #NonCorrelatedSubquery #BackendDeveloper #JavaDeveloper #AshokIT #CodingInterview #LearnSQL #DatabaseConcepts #ProgrammingTips #JobReadySkills #FullStackDeveloper

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