Jio Jpam Interview Questions and Answers

Q1. What improvements to interfaces were introduced in Java 8 that were missing in Java 7, specifically regarding static and default methods?
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Q2. Explain internal working of HashMap ? How to synchronize it ?
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Q3. Given a list of employees with their ratings, how can you sort the employees based on their ratings using the Java 8 Streaming API?
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Q4. Will the program compile if the parent class throws a runtime exception while the child class throws an arithmetic exception?
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Q5. In a Spring Boot application with two databases, how can you configure JDBC to specify which database to use?
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Q6. How to use a jetty server in your spring boot application ?
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Q7. Difference between @RequestParam and @PathVariable ?
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Q8. How would you handle a scenario where one microservice is awaiting a response from another microservice that is taking an extended time to respond?
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Q1. Create one Spring boot controller from end to end. No need to create a spring boot project we just want to see the structure and end to end implementation.
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Q2. Write a java 8 program to get the characters from a string whose count is 2 or more than 2 e.g. input: baseball , output: b, a, l.
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Q3. Why you left your previous organization.
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Q4. What is the functional interface
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Q5. What are the OOPS concepts. and some questions related to inheritance.
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Q6. Asked about the project mentioned in CV (Client project) and asked its architecture.
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Q7. Various SQL join types
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Q1. Are you ready to relocate to job location
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Q2. Why are you leaving your previous organization.
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Q3. Expectation about salary
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Q1. Java 8 , java 11 and java 17 features?
Ans. 
Java 8 introduced lambda expressions, Java 11 added local-variable syntax for lambda parameters, and Java 17 included sealed classes and pattern matching.
• Java 8 introduced lambda expressions for functional programming.

• Java 11 added local-variable syntax for lambda parameters to simplify code.

• Java 17 included sealed classes to restrict inheritance and pattern matching for instanceof checks and type casts.
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Q2. Dispatcher servlet, design patterns
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Q3. @SpringbootApplication annotation, actuators
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Q4. String Coding question with java 8 features such as lambda function and stream api
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Q5. Number of words in a string
Ans. 
Count the number of words in a given string.
• Split the string by spaces and count the number of resulting elements.

• Handle edge cases like multiple spaces or empty strings.

• Consider punctuation marks as part of words unless specified otherwise.
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Q6. Microservice design patterns
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C++ ,Java , CAD , CNC programming, Data analytics

Q1. What product management ur doing
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Q2. Where did you undergo your technical traing
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Q3. Where did u place most of your focus when reviewing somebody else code
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Q4. What did you develop
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Q5. What was the project before you are doing
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Q1. Draw Shear force and bending moment diagram of a fixed beam.
Ans. 
Shear force and bending moment diagrams show internal forces and moments in a fixed beam.
• Shear force diagram shows the variation of shear force along the length of the beam.

• Bending moment diagram shows the variation of bending moment along the length of the beam.

• At supports of a fixed beam, shear force is maximum and bending moment is zero.

• At midspan of a fixed beam, bending moment is maximum and shear force is zero.
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Q2. What is the position of reinforcement of a cantilever beam.
Ans. 
Reinforcement of a cantilever beam is positioned at the bottom to resist tension forces.
• Reinforcement is placed at the bottom of the cantilever beam to resist tension forces.

• The reinforcement helps in preventing the beam from bending or breaking under load.

• Examples of reinforcement materials include steel bars or mesh.

• Proper positioning and sizing of reinforcement is crucial for the structural integrity of the beam.
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Q3. In railway crossing, which type of sleeper is used.
Ans. 
Concrete sleepers are used in railway crossings.
• Concrete sleepers are preferred over wooden sleepers in railway crossings due to their durability and strength.

• Concrete sleepers help in maintaining the stability and alignment of the tracks at railway crossings.

• Examples of concrete sleepers used in railway crossings include monoblock sleepers and twin block sleepers.
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Q1. Java streams on students
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Q2. Select 8 form A,A
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Q3. Basic java questions
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Q4. Hibernate questions and database questions
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Q1. Difference between hashmap and hash table
Ans. 
HashMap is non-synchronized and allows null values, while HashTable is synchronized and does not allow null values.
• HashMap is non-synchronized, meaning it is not thread-safe, while HashTable is synchronized and thread-safe.

• HashMap allows null values for both keys and values, while HashTable does not allow null keys or values.

• HashMap is generally preferred for non-thread-safe applications, while HashTable is used in mul
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Q2. Static block related questions
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Q3. Arraylist and linkedlist question
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