Lonar Consulting Services Senior Software Engineer Interview Questions and Answers

Questions are asked from hackerrank . Difficulty level medium .
Prepare for SQL too.

Q1. Your projects, system design
Add your answer

Q1. What are services in Drupal?
Ans. 
Services in Drupal are reusable objects that perform specific functions, such as database queries or sending emails.
• Services are defined in YAML files and can be accessed throughout a Drupal site.

• They are used to encapsulate reusable functionality and promote code reusability.

• Examples of services in Drupal include the database service for interacting with the database, the mail service for sending emails, and the logge
Answered by AI
Add your answer
Q2. How to debug in Drupal?
Ans. 
Debugging in Drupal involves using tools like Devel module, watchdog(), and error logs.
• Enable Devel module for debugging information

• Use watchdog() function to log messages to Drupal's watchdog log

• Check error logs for PHP errors and warnings

• Use dpm() function to print variables for debugging purposes
Answered by AI
Add your answer

Q1. Questions on java , spring boot , containarisation tools, coding, SOLID principles
Add your answer

5 coading questions were asked in it

Q1. Manegerial round
Add your answer

Spark, python related questions

Q1. Previous project, scenario based problem to solve
Add your answer

Q1. Package, preffered location
Add your answer

Q1. What is the difference between List and Tuple?
Ans. 
List is mutable and Tuple is immutable in Python.
• List can be modified after creation while Tuple cannot be modified.

• List uses square brackets [] while Tuple uses parentheses ().

• List is used for homogenous data while Tuple is used for heterogenous data.

• List is slower than Tuple in terms of performance.

• Example of List: [1, 2, 3] and Example of Tuple: (1, 'hello', 3.14)
Answered by AI
View 1 more answer
Q2. What is __init__ ? Follow up question why is __ (double underscore) used?
Add your answer
Q3. A SQL query based on group by and order by DESC LIMIT 1 in order to fetch highest row of a group in a dataset given by panelist.
Add your answer
Q4. A simple query on SQL using group by and aggregate function.
Add your answer
Q5. Panelist asked about my previous work experience and projects I worked upon earlier and the technologies used.
Add your answer
Q6. Question on how do we create table using SQL Alchemy in Flask (since I had used Python Flask in one of my previous projects and had highlighted it pretty well on my resume).
Add your answer
Q7. How is memory managed in Python?
Ans. 
Python uses automatic memory management through garbage collection.
• Python uses reference counting to keep track of memory usage.

• When an object's reference count drops to zero, it is deleted.

• Python also uses a garbage collector to handle circular references.

• Memory allocation is handled by the Python memory manager.

• Python provides tools like the 'gc' module for managing memory usage.
Answered by AI
Add your answer

Q1. Question on List operation.
Add your answer
Q2. Do you know numpy pandas?
Ans. 
Yes, numpy and pandas are Python libraries used for data analysis and manipulation.
• NumPy is used for numerical operations on arrays and matrices.

• Pandas is used for data manipulation and analysis, providing data structures like DataFrame.

• Both libraries are commonly used in data science and machine learning.

• Example: import numpy as np; import pandas as pd;
Answered by AI
Add your answer
Q3. A question to count number of times a letter occurs in a sentence and then also find the maximum occurring letter.
Add your answer
Q4. Difference between generator and iterator?
Ans. 
Generator generates values on the fly while iterator iterates over a collection of values.
• Generator is a function that returns an iterator.

• Generators use 'yield' keyword to return values one at a time.

• Iterators are objects that implement the 'next' method to return the next value in a collection.

• Iterators can be created from arrays, strings, maps, sets, etc.

• Generators are useful for generating large sequences of values...read more
Answered by AI
Add your answer
Q5. What is the selling point about you why should we consider you over other candidate?
Add your answer

Q1. Why are you looking for a change?
Add your answer
Q2. What are your salary expectations?
Add your answer

Q1. Spark architecture pyspark coding sql coding
Add your answer

Q1. Spark architecture sql window functions,aggreate functions pyspark data frame coding
Add your answer

Few MCQ's and along with couple of SQL scenario questions

Q1. More of the project experience, skillset acquired and willing to learn or not
Add your answer

Q1. More of a skillset related and also the attitude
Add your answer

Q1. Compensation related and also the benefits
Add your answer