Liferay Interview Questions and Answers

Q1. What is a pointer to pointer
Ans. 
A pointer to pointer is a variable that stores the memory address of another pointer variable.
• It is used to create dynamic data structures like linked lists and trees.

• It allows multiple levels of indirection.

• It is denoted by ** in C and C++.

• Example: int **ptr;

• Example: ptr = &p; where p is a pointer variable.
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Q2. Class, object, inheritance, polymorphism,dbms
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Q1. Tell me about yourself
Ans. 
I am a motivated and enthusiastic individual with a strong passion for learning and gaining practical experience in the field of [Intern position].
• I am currently pursuing a degree in [relevant field] at [university]

• I have completed internships at [company/organization] where I gained valuable skills in [relevant skills]

• I am proficient in [relevant software/tools] and have experience in [relevant tasks/responsibilities]

• ...read more
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Q2. Your education background
Ans. 
I have a Bachelor's degree in Computer Science and currently pursuing a Master's degree in Data Science.
• Bachelor's degree in Computer Science

• Currently pursuing a Master's degree in Data Science
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Q3. How soon you can join
Ans. 
I can join within 2 weeks.
• I have completed all my academic commitments and can start immediately.

• I just need to give a two-week notice to my current employer.

• I am flexible and can adjust my start date based on your requirements.
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Q1. Technical skills? What do you know about DBMS
Ans. 
DBMS stands for Database Management System. It is a software system that allows users to define, create, maintain and control access to databases.
• DBMS is used to manage large amounts of data efficiently.

• It provides a way to store, retrieve and manipulate data in a structured way.

• Examples of popular DBMS include MySQL, Oracle, and Microsoft SQL Server.

• DBMS can be used in various applications such as banking, healthcare,...read more
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Q1. Communication and behavioral skills
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Q2. Introduction, Skill set, Relevant experience
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Q1. AWS - EC2, Lambda, VPC, Route53, Cognito, Cloudwatch, Kinesis, API Gateway
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Q2. ITIL - problem management, recently handled outages. SLA vs SLO. KPIs
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Q1. DevOps - SDLC explanation, Apache Tomcat, Linux Administration, Docker and Shell scripting
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Q2. Git, Python, Monitoring tools
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Q1. Salary expectations and other benefits discussion
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Q1. Salary Negotiation and salary structure explanation
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Q1. Normal question about past experience
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Q2. When you can join and all
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SQL test on Select query, insert, create

Q1. What are the main principles of the Java
Ans. 
Main principles of Java include object-oriented programming, platform independence, and automatic memory management.
• Object-oriented programming: Java is based on classes and objects, allowing for encapsulation, inheritance, and polymorphism.

• Platform independence: Java code can run on any platform that has a Java Virtual Machine (JVM) installed.

• Automatic memory management: Java uses garbage collection to automatically m
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Q2. What is the different between == and equals method
Ans. 
The == operator compares the memory addresses of two objects, while the equals method compares the content of two objects.
• The == operator is used to compare the memory addresses of two objects in Java.

• The equals method is used to compare the content of two objects in Java.

• Example: String str1 = new String("hello"); String str2 = new String("hello"); str1 == str2 will return false, but str1.equals(str2) will return true
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