Infosys Consulting Softwaretest Engineer Interview Questions and Answers

Q1. Whats is Denpendency injection?
Ans. 
Dependency injection is a design pattern in which components are given their dependencies rather than creating them internally.
• Allows for easier testing by injecting mock dependencies

• Promotes loose coupling between components

• Improves code reusability and maintainability

• Examples: Constructor injection, Setter injection, Interface injection
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Q2. What is middleware
Ans. 
Middleware is software that acts as a bridge between different applications, allowing them to communicate and share data.
• Middleware facilitates communication between different software applications

• It can handle tasks such as message queuing, data transformation, and security

• Examples of middleware include message brokers like RabbitMQ, ESBs like MuleSoft, and API gateways like Kong
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Q1. What is Bug lifecycle
Ans. 
Bug lifecycle refers to the stages a bug goes through from discovery to resolution.
• Bug is identified by tester

• Bug is reported in bug tracking system

• Bug is assigned to developer for fixing

• Developer fixes the bug

• Bug is retested by tester

• Bug is closed if fixed or reopened if issue persists
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Q2. What is Api testing
Ans. 
API testing is a type of software testing that involves testing APIs directly to ensure they meet functionality, reliability, performance, and security requirements.
• API testing involves testing the functionality of APIs by sending requests and verifying responses.

• It also includes testing for reliability, performance, and security of APIs.

• API testing can be done manually or using automated tools like Postman or SoapUI.

• E...read more
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Q1. Explain regression testing
Ans. 
Regression testing is the process of retesting a software application to ensure that new code changes have not adversely affected existing functionality.
• Performed after code changes to ensure that existing functionality still works

• Helps in identifying any new bugs introduced by the changes

• Automated tools like Selenium can be used for regression testing

• Regression test suites are often created to streamline the process
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Q2. Explain high severity low priority bug
Ans. 
A high severity low priority bug is a software issue that has a significant impact on the system but can be deferred for fixing.
• High severity means the bug has a major impact on the system functionality or performance.

• Low priority indicates that the bug can be fixed at a later stage as it does not hinder the basic functionality.

• Examples: A spelling mistake in a less frequently used feature, a cosmetic issue in the user
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Java code , oops, sql , spring bbot

Q1. Maximum area of Stack
Ans. 
The maximum area of a stack is determined by the size of the stack and the items it can hold.
• The maximum area of a stack is calculated by multiplying the height of the stack by the width of the stack.

• For example, if a stack has a height of 10 units and a width of 5 units, the maximum area would be 50 square units.
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Q2. Length of longest substring
Ans. 
Find the length of the longest substring without repeating characters.
• Iterate through the string and keep track of the characters seen so far in a set.

• Use two pointers to mark the start and end of the current substring.

• Update the maximum length of the substring as you iterate through the string.
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Computerized test based on simpel math questions

Q1. Sdlc explanation
Ans. 
SDLC stands for Software Development Life Cycle, a process used by software development teams to design, develop, and test high-quality software.
• SDLC is a framework that defines tasks performed at each phase of software development.

• Common phases include planning, analysis, design, implementation, testing, and maintenance.

• Each phase has specific goals and deliverables to ensure the software meets requirements and qualit...read more
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