Apptomate Digital Softwaretest Engineer Interview Questions and Answers

Q1. Whatever written in cv keep it in mind
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Q1. One to one round with manager
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Q1. Final salary discussion
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Q1. What is polymorphism
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Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.
• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to be used for different data types or classes.

• Examples include method overloading and method overriding in object-oriented programming.
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Q2. Find missing number from nth number array.
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Find missing number from nth number array.
• Iterate through the array and calculate the sum of all numbers

• Calculate the sum of numbers from 1 to n using the formula n*(n+1)/2

• Subtract the sum of array from the sum of numbers from 1 to n to find the missing number
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Q3. Explain inheritance and it types
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Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.
• Inheritance allows a class to reuse code from another class.

• Types of inheritance include single inheritance, where a class inherits from only one parent class, and multiple inheritance, where a class inherits from multiple parent classes.

• Example: Class B inherits from Class A, so Class B can access
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Q4. Find 2nd max elements from aaray
Ans. 
Find 2nd max element from array of strings
• Sort the array in descending order

• Skip the first element (max element)

• Return the second element
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Coding Test was on Coderbyte. Consisted 4 questions. 1 coding and 3 of web developement.

Q1. General HR questions.
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Q1. General Techinal questions
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Q1. Spark architecture.
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Q2. Narrow and wide transformations
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Q1. Strecture of sql statement
Ans. 
SQL statements are used to interact with databases by performing operations like querying, updating, and deleting data.
• SQL statements are made up of keywords like SELECT, INSERT, UPDATE, DELETE, etc.

• They are structured in a specific order, with clauses like WHERE, ORDER BY, GROUP BY, etc.

• Tables are referenced using their names, and conditions are specified to filter data.

• Joins can be used to combine data from multiple
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Q1. 1.diffrence between javaScript and nodejs
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JavaScript is a programming language used for web development, while Node.js is a runtime environment for executing JavaScript code outside of a web browser.
• JavaScript is primarily used for client-side scripting, while Node.js is used for server-side scripting.

• JavaScript is executed in a web browser, while Node.js is executed on a server.

• Node.js provides additional modules and libraries for server-side development, suc...read more
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Q2. 2.Tell me the angular lifecycle
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Angular lifecycle consists of eight different phases.
• The first phase is ngOnChanges() which is called when a component receives data-bound input properties.

• The second phase is ngOnInit() which is called once the component is initialized.

• The third phase is ngDoCheck() which is called during every change detection run.

• The fourth phase is ngAfterContentInit() which is called after the component's content has been projecte...read more
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Q3. 3. what is the use of ORM Tool
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ORM tool is used to map object-oriented programming language to a relational database management system.
• ORM tool helps in reducing the amount of code required to interact with the database.

• It provides an abstraction layer between the application and the database.

• ORM tool helps in managing the database schema and relationships between tables.

• It allows developers to work with objects instead of SQL statements.

• Examples of...read more
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Q4. 4. What is form control build.
Ans. 
Form control build refers to the process of creating and customizing form controls in web development.
• Form controls are elements like text boxes, radio buttons, and dropdown menus that allow users to input data on a website.

• Developers can use HTML, CSS, and JavaScript to build and style form controls to fit the needs of their website or application.

• Form control build also involves adding validation and error handling t
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Q1. What programming language are you most proficient?
Ans. 
I am most proficient in Java.
• Extensive experience in developing applications using Java

• Strong understanding of object-oriented programming principles

• Familiarity with popular Java frameworks like Spring and Hibernate
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Q2. .NET, Angular and Sql Server
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Q1. How would you design a system that needs to handle million of records
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I would design a system using scalable architecture, efficient data storage, and optimized query processing.
• Utilize a distributed database system like Cassandra or Hadoop for storing large volumes of data

• Implement data partitioning and sharding to distribute the data across multiple servers

• Use indexing and caching mechanisms to optimize query performance

• Employ load balancing techniques to evenly distribute incoming req...read more
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