LogicMonitor Interview Questions, Process, and Tips

My 1st Round was Coding round where there were leetcode medium-hard problem one was on linked list that check if it returns any boolean value and another one was there is array divide it into parts and nums and it had string given as input both were hard questions but i managed to clear it .

Q1. SQL Basic Concepts - Indexing, Joins, DDL, DML, Difference between SQL and NO-SQL
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Q2. Java - Garabge Collection, Package, Interface, OOPS Concepts, Difference between package and interface why we need interface? java oops based program on object and classes, prepare DSA
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Q1. Scenario based question like i have a shop and i have multiple white shoes so create pair using hasmap and write algorithm, code for fancy number
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Q2. Based on resume, projects and internship
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First round will be coding test which will have Core java questions

Q1. Type of Class Loaders available in java
Ans. 
Java has three types of class loaders: Bootstrap Class Loader, Extension Class Loader, and System Class Loader.
• Bootstrap Class Loader loads core Java classes located in the bootstrap classpath.

• Extension Class Loader loads classes from the extensions directory.

• System Class Loader loads classes from the classpath specified by the CLASSPATH environment variable.
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Q2. Coding question related find 3nd highest number with single loop and minimum time complexity.
Ans. 
Use a single loop to find the 3rd highest number in an array with minimum time complexity.
• Iterate through the array and keep track of the three highest numbers encountered so far.

• Update the three highest numbers as you iterate through the array.

• Return the third highest number once the loop is completed.
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Q3. What is diff between cyclicBarrier and countDownLatch?
Ans. 
CyclicBarrier allows a group of threads to wait at a barrier until all threads have reached it, while CountDownLatch allows one or more threads to wait until a set of operations being performed in other threads completes.
• CyclicBarrier is reusable, while CountDownLatch is not.

• CyclicBarrier allows all threads to wait for each other, while CountDownLatch allows one thread to wait for others.

• CyclicBarrier resets automatica...read more
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Q4. What is diff between JPARepository and CURDRepository?
Ans. 
JPARepository is a Spring Data interface for JPA-based repositories, while CRUDRepository is a generic interface for CRUD operations.
• JPARepository extends CRUDRepository and provides additional JPA-specific methods.

• CRUDRepository is a generic interface for CRUD operations on a repository.

• JPARepository is typically used for JPA-based repositories, while CRUDRepository can be used for any type of repository.

• JPARepository...read more
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Q1. Second round is pending
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Good DSA knowledge requires

Q1. Merge sorted array
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Q1. Java questions, troubleshooting
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Q2. Merge sorted array
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Q1. Techno managerial
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Not applicable for details disclosure

Q1. General questions
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Basic 2 ,3 Java programs. Moderate level.

Q1. Core Java theory questions. Questions focused on multithreading. Basic spring boot questions.
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Q2. How to handle authentication in Spring Boot
Ans. 
Authentication in Spring Boot is handled using Spring Security which provides various authentication mechanisms.
• Use Spring Security to configure authentication in Spring Boot

• Define a custom UserDetailsService to load user-specific data for authentication

• Use annotations like @EnableWebSecurity and @EnableGlobalMethodSecurity to secure endpoints

• Configure authentication providers like in-memory, JDBC, LDAP, etc. in the ap
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Q3. Transient keyword
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Q1. Core Java programs. Core Java theory questions
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Q2. How many ways in Java we can handle deadlock or ways to handle synchronisation in Java.
Ans. 
In Java, deadlock can be handled by using techniques like avoiding nested locks, using timeout, and using the java.util.concurrent package.
• Avoid nested locks to prevent potential deadlocks.

• Use timeout when acquiring locks to prevent indefinite waiting.

• Utilize java.util.concurrent package classes like ReentrantLock and Semaphore for more advanced synchronization control.
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Q1. Basic salary related questions
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