10+ Interview Questions and Answers

As a Test Engineer, day-to-day activities involve test planning, test case creation, test execution, bug reporting, and collaborating with the development team.

• Creating test plans and strategies based on project requirements

• Designing and developing test cases to ensure comprehensive test coverage

• Executing test cases and documenting test results

• Identifying and reporting software defects or issues

• Collaborating with the development team to understand requirements and resolve iss...read more

Response codes indicate the status of a HTTP request. 200 & 201 are success codes, while 400 & 403 are client error codes.

• 200 - OK: Request was successful

• 201 - Created: Request was successful and a new resource was created

• 400 - Bad Request: The server cannot process the request due to a client error

• 403 - Forbidden: The server understood the request, but refuses to authorize it

Sort an array of strings without using inbuilt methods

• Iterate through the array and compare each element with the rest to find the correct position

• Use a temporary variable to swap elements if needed

• Repeat the process until the array is sorted

Use binary search to find the index of an element in a sorted array of strings.

• Sort the array of strings first to enable binary search.

• Compare the target element with the middle element of the array.

• Based on the comparison, narrow down the search to either the left or right half of the array.

To investigate bottlenecks in Database loading, follow these steps:

• Check the database schema and optimize it if necessary

• Analyze the query execution plan and optimize it

• Check the hardware resources and upgrade if needed

• Monitor the disk I/O and network traffic

• Use profiling tools to identify slow queries or code

• Consider using caching mechanisms

• Partition large tables to improve performance

Advance tax is a system of paying tax in advance based on estimated income for the year.

• Advance tax is a method of paying a portion of your taxes before the end of the financial year.

• It is applicable to individuals, self-employed professionals, and businesses with tax liabilities above a certain threshold.

• The purpose of advance tax is to ensure regular inflow of taxes to the government and prevent tax evasion.

• Failure to pay advance tax may result in penalties and interest cha...read more

No, withholding tax and TDS are not the same.

• Withholding tax is a broader term that includes TDS (Tax Deducted at Source) as one of its components.

• TDS is a specific type of withholding tax where tax is deducted at the source of income.

• Withholding tax can also include other types of taxes withheld by a payer before paying the income to the recipient.

• For example, TDS is a form of withholding tax applied to income from interest, dividends, salary, etc.

Status codes for HTTP methods

• GET - 200 OK, 404 Not Found

• POST - 201 Created, 400 Bad Request

• PUT - 200 OK, 204 No Content

• PATCH - 200 OK, 204 No Content

• DELETE - 200 OK, 204 No Content

Explain plan is a tool in Oracle that shows the execution plan of a SQL statement.

• Explain plan is used to analyze and optimize SQL queries.

• It shows the order in which tables are accessed, the join methods used, and the access methods used.

• The output of explain plan can be viewed in text or graphical format.

• It helps in identifying performance bottlenecks and optimizing the query execution time.

• Explain plan can be generated using the EXPLAIN PLAN statement or the DBMS_XPLAN pac...read more

HTTP methods are used to indicate the desired action to be performed on a resource.

• GET: Retrieve data from a server

• POST: Send data to a server to create a new resource

• PUT: Update an existing resource on a server

• DELETE: Remove a resource from a server

• PATCH: Partially update an existing resource on a server

The 4 pillars of OOP are Inheritance, Encapsulation, Abstraction, and Polymorphism.

• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation restricts access to certain components of an object, protecting its integrity.

• Abstraction hides complex implementation details and only shows the necessary features.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.

• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• Retrieving a value involves hashing the key to find the correct index and then traversing the link...read more

Implementation of Create, Read, Update, and Delete operations in a software system.

• Use SQL queries for database operations

• Create separate functions for each operation

• Handle errors and exceptions properly

• Test thoroughly to ensure functionality

• Consider security measures to prevent unauthorized access

Use the built-in sort() method in JavaScript to sort an array of integers.

• Use the sort() method with a compare function to sort the array in ascending order.

• For descending order, return b - a instead of a - b in the compare function.

• Example: let arr = [3, 1, 5, 2]; arr.sort((a, b) => a - b);

Rest API is a set of rules and conventions for building and interacting with web services using HTTP methods.

• Rest API stands for Representational State Transfer Application Programming Interface.

• It uses standard HTTP methods like GET, POST, PUT, DELETE to perform CRUD operations.

• RESTful APIs use URLs to access resources, and return data in JSON or XML format.

• Stateless communication allows for scalability and flexibility in REST APIs.

• Example: GET request to 'https://api.exampl...read more

Rotate an array of strings by a specified number of positions.

• Create a new array to store the rotated elements.

• Use modulo operator to handle cases where the rotation count exceeds the array length.

• Copy elements from original array to the new array based on the rotation count.

• Return the rotated array.

nslookup is a command-line tool used to query DNS servers to obtain domain name or IP address information.

• Used to troubleshoot DNS-related issues

• Can be used to query specific DNS servers

• Provides information such as IP address, domain name, and DNS server used