Celebal Technologies QA Automation Engineer Interview Questions and Answers

Q1. Mainly related to JAVA programming
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Q2. Selenium project reviews
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Q1. Reverse the string
Ans. 
Reverse a given string
• Create a new empty string to store the reversed string

• Iterate through the original string from end to start and append each character to the new string

• Return the reversed string
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Q2. Scenario based questions
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In this first round it was of 45mins which included MCQ question and 1 coding question.

Q1. 1.Difference Between Const,Var,Char. 2.Oop's concept with example 3.JavaScript is async or sync language and explain the reason. 4.How to create a simple object in JavaScript. 5.Find element and Find Eleme...read more
Ans. 
Answers to common interview questions for Automation Test Engineer position.
• Const is used for constant values that cannot be reassigned, var is used for variable declaration, and char is a data type for storing characters in programming languages.

• OOPs concepts include inheritance, encapsulation, polymorphism, and abstraction. Example: Inheritance allows a class to inherit properties and methods from another class.

• JavaS...read more
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Q2. What is Type coercion?
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Type coercion is the process of converting one data type to another in programming.
• Type coercion can happen implicitly or explicitly in programming languages.

• Implicit type coercion occurs when the language automatically converts data types during operations.

• Explicit type coercion occurs when the programmer manually converts data types using functions or operators.

• Example: In JavaScript, the addition operator (+) can pe...read more
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Q3. What is Inheritance? Polymorphism?
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Inheritance is a mechanism in object-oriented programming where a class inherits properties and behaviors from another class. Polymorphism allows objects of different classes to be treated as objects of a common superclass.
• Inheritance allows for code reusability by defining a new class based on an existing class.

• Polymorphism enables flexibility in programming by allowing objects to be treated as instances of their pare...read more
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Q4. API Error code with explaination?
Ans. 
API error codes are unique identifiers used to indicate specific errors in an API response.
• API error codes are typically numeric or alphanumeric codes that correspond to specific errors in the API.

• Each error code should have a corresponding explanation in the API documentation to help developers understand the issue.

• Examples of API error codes include 400 Bad Request, 401 Unauthorized, and 404 Not Found.
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Q1. Introduce Yourself? Why should we hire you? What is your relevant experience? Tell me about yourself? What are your salary expectations?
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Q1. LOCATE X PATH , GET WINDOW HANDLE
Ans. 
Locate element using Xpath and retrieve window handle in automation testing.
• Use findElement method with By.xpath to locate the element using Xpath.

• Use getWindowHandle method to retrieve the window handle.
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Q2. TYPES OF WAITS WITH THEIR SYNTAX
Ans. 
Types of waits in automation testing with their syntax
• Implicit Wait: driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);

• Explicit Wait: WebDriverWait wait = new WebDriverWait(driver, 10); wait.until(ExpectedConditions.visibilityOfElementLocated(By.id("elementID")));

• Fluent Wait: Wait wait = new FluentWait(driver).withTimeout(Duration.ofSeconds(10)).pollingEvery(Duration.ofSeconds(2)).ignoring(NoSuchElementEx
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Q1. Write Java code to find square root without Math.sqrt()
Ans. 
Use Newton's method to find square root without Math.sqrt() in Java.
• Initialize a variable to store the guess value of square root

• Iterate until the difference between the guess and actual square root is within a desired threshold

• Update the guess value using the formula: guess = (guess + number/guess) / 2
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Q2. Write Java code to add digits of a number until the sum is a single digit
Ans. 
Java code to add digits of a number until the sum is a single digit
• Create a function that takes an integer as input

• Use a while loop to keep adding the digits until the sum is a single digit

• Convert the number to a string to easily access individual digits
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Q3. Write a Java code to print a particular pattern
Ans. 
Java code to print a particular pattern using loops
• Use nested loops to iterate through rows and columns

• Print specific characters based on the row and column index

• Example: Printing a pyramid pattern
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Q1. HTTP error code : 203 ?
Ans. 
HTTP error code 203 indicates that the server successfully processed the request, but is returning information that may be from another source.
• HTTP 203 is a non-standard error code that is not defined in the HTTP/1.1 standard.

• It is typically used to indicate that the server successfully processed the request, but is returning information from a different source.

• This status code is not commonly used and may not be suppo
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Q2. Arraylist vs linklist
Ans. 
ArrayList is a resizable array implementation, LinkedList is a doubly linked list implementation.
• ArrayList is faster for accessing elements by index, LinkedList is faster for adding/removing elements in the middle.

• ArrayList uses less memory as it only stores elements, LinkedList uses more memory as it stores elements and pointers.

• ArrayList is better for random access, LinkedList is better for sequential access.

• Example:...read more
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Q1. How do you check property is already initialized or not in Selenium
Ans. 
To check if a property is already initialized in Selenium, you can use the 'isDisplayed' method.
• Use the 'isDisplayed' method to check if the property is visible on the web page

• If the property is visible, it is likely initialized

• If the property is not visible, it may not be initialized
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Q2. What is Generics

Ans. 

Generics in programming allow for the creation of classes, interfaces, and methods that operate on specified types.

• Generics provide type safety by allowing the specification of types at compile time.

• They enable the creation of reusable code that can work with different data types.

• Examples include List in C# and ArrayList in Java.

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