Microland Senior Engineer L1 Interview Questions and Answers

Q1. What are closures
Ans. 
Closures are functions that have access to variables from their containing scope even after the scope has closed.
• Closures allow functions to access variables from their outer function even after the outer function has finished executing.

• They are commonly used in event handlers, callbacks, and asynchronous programming.

• Closures help in maintaining state in functional programming.
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Q2. What is virtual DOM
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Virtual DOM is a lightweight copy of the actual DOM used for efficient updates in web development.
• Virtual DOM is a concept used in frameworks like React to improve performance by minimizing actual DOM manipulations.

• When changes are made to the virtual DOM, a comparison is done with the actual DOM to determine the minimal updates needed.

• This approach reduces the number of costly DOM operations, resulting in faster rende
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Q3. What are the data types in JS
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Data types in JavaScript include number, string, boolean, object, function, undefined, and null.
• Number - represents numeric data, e.g. 10, 3.14

• String - represents textual data, e.g. 'hello', '123'

• Boolean - represents true or false values, e.g. true, false

• Object - represents complex data structures, e.g. { key: 'value' }

• Function - represents executable code, e.g. function() { }

• Undefined - represents a variable that has ...read more
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Q1. Write react code for counter
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React code for a simple counter
• Create a functional component for the counter

• Use useState hook to manage the count state

• Render the count value and buttons to increment and decrement the count
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Q1. Salary discussion
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Q1. What are the OOPS concepts
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Q2. MultiThreading, synchronization
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Q1. Tell me about yourself
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Q1. Explain about the rac
Ans. 
RAC stands for Real Application Clusters, a feature of Oracle Database that allows multiple instances to access a single database simultaneously.
• RAC enables high availability and scalability for Oracle databases.

• It allows multiple instances to run on different servers, providing load balancing and failover capabilities.

• RAC requires shared storage and a cluster interconnect for communication between instances.

• Examples o...read more
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Q2. Explain about the datagaurd
Ans. 
Data Guard is a high availability and disaster recovery solution provided by Oracle for Oracle databases.
• Data Guard ensures high availability, data protection, and disaster recovery for Oracle databases.

• It involves creating standby databases that are synchronized with the primary database to provide failover capabilities.

• Data Guard can be configured in various modes such as Maximum Availability, Maximum Performance, an...read more
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Q1. User management
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Q2. Previous organization work
Ans. 
I worked as a Senior Consultant at XYZ Company, where I led a team of consultants to provide strategic solutions to clients.
• Led a team of consultants to provide strategic solutions to clients

• Developed and implemented customized strategies to meet client needs

• Collaborated with cross-functional teams to deliver successful projects
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Q1. What is the use of datafiles
Ans. 
Datafiles are used to store data in a database system.
• Datafiles store actual data in a database system

• They are used to organize and manage data efficiently

• Datafiles can be used to store tables, indexes, and other database objects

• They are essential for the functioning of a database system
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Q2. Explain about the glodengate
Ans. 
GoldenGate is a data integration software product used for real-time data integration and replication.
• GoldenGate allows for real-time data movement between heterogeneous systems.

• It can be used for data replication, data synchronization, and data transformation.

• GoldenGate supports various databases such as Oracle, SQL Server, MySQL, etc.

• It provides high availability and data consistency during data integration processes
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Q1. Basic JS related question
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Q2. Angular Basic + Advance Question
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Aptitude test with aptitude based questions

Q1. What is variable hoisting.
Ans. 
Variable hoisting is a behavior in JavaScript where variable declarations are moved to the top of their scope during compilation.
• Variable declarations are hoisted to the top of their function or global scope.

• Only the declarations are hoisted, not the initializations.

• This can lead to unexpected behavior if variables are accessed before they are declared.
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Q2. What is closures in js
Ans. 
Closures in JavaScript allow functions to access variables from an outer function even after the outer function has finished executing.
• Closures are created whenever a function is defined within another function.

• Inner functions have access to the outer function's variables even after the outer function has returned.

• Closures are commonly used to create private variables and functions in JavaScript.

• Example: function outer...read more
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Q1. Tell me about yourself?
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Q2. Can you relocate to Bengaluru?
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Q1. How do you read an external text file
Ans. 
To read an external text file, you can use file handling techniques in programming languages like Python or Java.
• Use file handling functions like open(), read(), and close() in Python to read an external text file.

• In Java, use classes like FileReader and BufferedReader to read text files.

• Specify the file path and mode (read mode) when opening the file.

• Read the contents of the file line by line or as a whole, depending ...read more
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Q2. Write a java program to find the occurrences of characters
Ans. 
Java program to find occurrences of characters in a string
• Create a HashMap to store characters and their counts

• Iterate through the string and update the counts in the HashMap

• Print the characters and their counts from the HashMap
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Q1. What is Pricing condition
Ans. 
Pricing condition is a rule or criteria used to determine the price of a product or service.
• Pricing conditions can include factors such as quantity discounts, promotional offers, and contract terms.

• They are typically set in pricing tables within a company's ERP system.

• Pricing conditions are used to calculate the final price that a customer will pay for a product or service.

• Examples of pricing conditions include discoun...read more
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Q2. What is structure of Order
Ans. 
The structure of an Order typically includes customer information, product details, quantity, price, and payment information.
• Customer information (name, address, contact details)

• Product details (name, description, SKU)

• Quantity of each product ordered

• Price of each product

• Payment information (payment method, total amount)

• Order status (pending, shipped, delivered)
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Q3. How plant will be determine in Sales order
Ans. 
Plants in a sales order are determined based on the customer's requirements, availability, pricing, and shipping logistics.
• Plants are determined based on the customer's location and delivery preferences.

• Availability of the product at different plant locations is considered.

• Pricing and discounts may vary based on the plant from which the product is shipped.

• Shipping logistics such as distance, transportation costs, and d...read more
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