10+ 500x Tech Labs Interview Questions and Answers

DQL stands for Document Query Language. It is used to query documents in a document-oriented database like MongoDB.

• DQL is used to retrieve documents from a MongoDB database.

• It supports a wide range of query operators and expressions.

• DQL can be used to perform complex queries on nested documents.

• It also supports aggregation pipeline for advanced data processing.

• Examples of DQL queries include find(), findOne(), and aggregate().

SQL is a programming language used to manage and manipulate relational databases.

• SQL stands for Structured Query Language

• It is used to create, modify, and query databases

• Commonly used in web development and data analysis

• Examples of SQL commands include SELECT, INSERT, UPDATE, and DELETE

Integration testing checks if individual modules work together, while acceptance testing checks if the system meets requirements.

• Integration testing verifies the interaction between different modules of the system.

• Acceptance testing checks if the system meets the requirements and specifications.

• Integration testing is done before acceptance testing.

• Integration testing is usually done by developers, while acceptance testing is done by end-users or clients.

• Integration testing ca...read more

Performance testing tools are software applications used to measure the speed, stability, and scalability of a system under various workloads.

• Performance testing tools simulate real-world scenarios to identify bottlenecks and optimize system performance.

• Examples of performance testing tools include JMeter, LoadRunner, Gatling, and Apache Bench.

• These tools can measure response time, throughput, resource utilization, and other performance metrics.

• Performance testing tools can h...read more

Latent defect is a hidden flaw in a product that is not immediately apparent and can cause problems later.

• Latent defects are not visible during testing or inspection.

• They can cause problems after the product has been released to the market.

• Latent defects can be caused by design flaws, manufacturing errors, or other factors.

• Examples of latent defects include software bugs that only occur under certain conditions and structural weaknesses in buildings that are not apparent unti...read more

Verification ensures the product is built according to specifications, while validation ensures it meets the customer's needs.

• Verification checks if the product meets the specified requirements

• Validation checks if the product meets the customer's needs

• Verification is done before validation

• Verification is a process of evaluating documents, design, code, and program

• Validation is a process of evaluating the final product

• Example: Verification checks if the software has all the re...read more

Regression testing is the process of testing changes made to a software application to ensure that existing functionality still works as intended.

• It is performed after making changes to the software

• It ensures that existing functionality is not affected by the changes

• It helps to catch any defects or bugs introduced by the changes

• It can be automated using testing tools

• Examples include retesting after bug fixes, testing after new features are added, and testing after software up...read more

Sanity and Smoke are types of testing in software QA.

• Smoke testing is a quick test to check if the basic functionalities of the software are working or not.

• Sanity testing is a more thorough test to check if the new changes or fixes in the software have not affected the existing functionalities.

• Smoke testing is done before the actual testing begins, while sanity testing is done after the actual testing is completed.

• Smoke testing is a subset of regression testing, while sanity ...read more

Bug release refers to the process of fixing and deploying a bug-free version of software.

• Bug release involves identifying and fixing bugs in software.

• Once the bugs are fixed, a new version of the software is released.

• The new version is thoroughly tested to ensure that all bugs have been fixed.

• Bug release is an important part of software development as it ensures that the software is bug-free and performs optimally.

• Examples of bug release tools include Bugzilla, JIRA, and GitH...read more

Bug Leakage is when a bug is detected by end-users or customers instead of being caught during testing.

• Bug Leakage occurs when a bug is not identified during the testing phase and is released to the end-users.

• It can happen due to inadequate testing, lack of communication between teams, or insufficient test coverage.

• Bug Leakage can lead to a negative impact on the product's reputation and customer satisfaction.

• Examples of Bug Leakage include a broken link on a website, an app ...read more

QA is process-oriented and focuses on preventing defects, while QC is product-oriented and focuses on identifying defects.

• QA is a proactive process that ensures quality standards are met throughout the development cycle.

• QC is a reactive process that involves testing the product to identify defects.

• QA involves creating and implementing processes and procedures to prevent defects.

• QC involves executing tests to identify defects and ensure the product meets quality standards.

• QA i...read more

Test case is a set of conditions or variables under which a tester will determine whether an application or software system is working correctly or not.

• Test case is a document that contains a set of steps to be executed to verify a particular feature or functionality of an application.

• It includes preconditions, input data, expected results, and post-conditions.

• Test cases should be designed to cover all possible scenarios and edge cases.

• Test cases should be easy to understand ...read more