JanBask Interview Questions and Answers

Q1. What is the concept of a session in PHP?
Ans. 
A session in PHP is a way to store information (variables) to be used across multiple pages.
• Sessions are used to store user data on the server for later use

• Sessions are identified by a unique session ID, usually stored in a cookie

• Session data is stored on the server side, making it more secure than using cookies alone
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Q2. What is the difference between variables and constants in PHP?
Ans. 
Variables can be changed during the execution of a script, while constants cannot be changed once they are defined.
• Variables can be reassigned with new values, while constants cannot be changed once defined

• Constants are defined using the define() function, while variables are assigned using the $ symbol

• Constants are case-sensitive by default, while variables are case-insensitive
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Q3. What will be the output of the code below and why?
Ans. 
The code will output 'Hello World!' because the variable $x is set to true.
• The code will check if $x is true, which it is, so it will output 'Hello World!'

• The if statement will only execute if the condition is true, in this case $x is true.
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What are the differences between echo and print in PHP?

Q1. Questions were based QMS & ISMS and past experience
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Q1. Discussed about past experience
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Easy you will have enough time to solve the questions

Q1. Tell me about yourself
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Q2. Why you want to join our company
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Q1. Scenario of microservice saga pattern
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Q2. Given an integer array segregate odd and even numbers without using another array
Ans. 
Segregate odd and even numbers in an integer array without using another array
• Iterate through the array and maintain two pointers, one for odd numbers and one for even numbers

• Swap elements at the odd and even pointers until all odd numbers are on one side and even numbers on the other

• Example: Input array [3, 6, 8, 5, 4], Output array [6, 8, 4, 5, 3]
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Q1. Reverse the string and find occurance of character in java
Ans. 
To reverse a string and find the occurrence of a character in Java.
• Use StringBuilder to reverse the string.

• Use a loop to iterate through the string and count the occurrences of the character.

• Use the charAt() method to access individual characters in the string.
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Q2. Write screenshot script in selenium
Ans. 
To take a screenshot in Selenium, use the getScreenshotAs method
• Create a WebDriver instance

• Use the getScreenshotAs method to capture the screenshot

• Save the screenshot to a file using File class
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Q3. Write getter an setter method
Ans. 
Getter and setter methods are used to access and modify the values of private variables in a class.
• Create a method with the prefix 'get' followed by the variable name to retrieve its value.

• Create a method with the prefix 'set' followed by the variable name to set its value.

• Ensure the getter method returns the value of the variable and the setter method updates the variable with the passed value.
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Q4. Opps concept and its pillar
Ans. 
Object-oriented programming paradigm and its four pillars: Inheritance, Encapsulation, Abstraction, Polymorphism
• Inheritance: Allows a class to inherit properties and behavior from another class

• Encapsulation: Bundling data and methods that operate on the data into a single unit

• Abstraction: Hiding the complex implementation details and showing only the necessary features

• Polymorphism: Ability to present the same interface
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Q1. Mvvm and Mvc architectures
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Q2. Gave Code snippets to find the output
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Q3. Swift basics and concepts like memory management
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Q4. Oops concepts and solid principles
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The questions are quite simple.

Two SQL and two Python HackerRank questions.

Q1. What questions were asked regarding your resume project?
Ans. 
Questions were asked about the projects listed on my resume, focusing on the technologies used, challenges faced, and results achieved.
• Technologies used in the project

• Challenges faced during the project

• Results achieved from the project
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Q1. General questions
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Q1. About the project that I have worked
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Q2. Technical Experience
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Q1. Databinding in android
Ans. 
Databinding in Android allows for easier connection between UI components and data sources.
• Databinding eliminates the need for findViewById() calls in your code.

• It allows for easier access to data in your layouts using data binding expressions.

• Databinding can improve code readability and reduce boilerplate code.

• Example:
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Q2. What is the packaging process in android
Ans. 
Packaging process in Android involves compiling the code, resources, and assets into an APK file for distribution.
• Compile the Java code into .class files

• Compile the resources (XML files, images, etc.) into a binary format

• Package all the compiled files into an APK file using the Android Asset Packaging Tool (AAPT)

• Sign the APK file with a private key for security

• Align the APK file for optimization
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Q3. What is an MVVM design pattern
Ans. 
MVVM is a design pattern that separates the user interface from the business logic and data model.
• MVVM stands for Model-View-ViewModel

• Model represents the data and business logic

• View represents the user interface

• ViewModel acts as an intermediary between the Model and View

• MVVM helps in achieving separation of concerns and easier unit testing
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Q1. Most of the question related to architecture and system design
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Q1. Face to face interview with director
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In Aptitude test contains topics like time, percentages,data interpretation etc.

In this round It is 30 mins we have 25 MCQ questions to attempt it is in Java/Python based questions.

Q1. Tell me about your self
Ans. 
I am a recent graduate with a degree in engineering, passionate about problem-solving and eager to learn and grow in a professional setting.
• Recent graduate with a degree in engineering

• Passionate about problem-solving

• Eager to learn and grow in a professional setting
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Q2. Explain about your projects
Ans. 
I have worked on various projects including designing a solar-powered irrigation system and developing a mobile app for waste management.
• Designed a solar-powered irrigation system to help farmers in remote areas access water for their crops

• Developed a mobile app for waste management to help users locate nearby recycling centers and schedule pickups

• Implemented IoT sensors in the irrigation system to monitor soil moistur
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Q1. Group discussion
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Q2. How do you know about our company
Ans. 
Researched online, read about company culture, products, and recent news.
• Researched online to learn about company history and values

• Read about the products and services offered by the company

• Kept up to date with recent news and developments within the company

• Checked out employee reviews on platforms like Glassdoor
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Q1. Tell me about your self
Ans. 
I am a recent graduate with a degree in engineering, eager to learn and grow in a professional setting.
• Recent graduate with a degree in engineering

• Eager to learn and grow in a professional setting

• Strong problem-solving skills

• Experience with technical projects during studies
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Q2. General Questions
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