Technology Questions

Class hierarchies promote reuse in two ways. They are code sharing and interface sharing.

B+ tree. Because in B+ tree, all the data is stored only in leaf nodes, that makes searching easier. This corresponds to the records that shall be stored in leaf nodes

QA stands for QUALITY ASSURANCE. QA team assures the quality by monitor the whole development process. QA tracks the outcomes and adjusting process to meet the expectation.

The role of Quality Assurance is discussed below:

- QA team is responsible for monitoring the process to be carried out for development.

- Responsibilities of QA team are planning testing execution process.

- QA Lead creates the time tables and agrees on a Quality Assurance plan for the product.

- QA team communicated QA process to the team members.

- QA team ensures traceability of test cases to requirements.

Stack. Because of its LIFO (Last In First Out) property it remembers its ‘caller’ so knows whom to return when the function has to return. Recursion makes use of system stack for storing the return addresses of the function calls. Every recursive function has its equivalent iterative (non-recursive) function. Even when such equivalent iterative procedures are written, explicit stack is to be used.

A system call is a function.subroutine which interrupts the currently executing program and transfers control to the interrupt routine.The contents of the executing program are saved and after the interrupt routine finishes its function,control is transferred back to the executing program. If we talk in the context of Linux then System calls are called kernel mode.

Whereas API (Application Programming Interface) is a function or a set of functions, objects, protocols or data-structures for the support of application development for developers/programmers. It is actually a kind of function definition which specifies how to make available of a specific service of the system/OS to the other program/process or system. Read more at: https://www.queryhome.com/48442/os-what-is-difference-between-system-call-and-api

BRD - Business Requirement document is consist of functional Business Requirements, Gap Analysis (between current and future scenarios), In scope and Out of scope of the project, Business rules, Assumptions, Risk etc.

SRS - Source Requirement Specification is consist of Use cases, Use Case Scenarios, Activity flow diagram, Non functional Business Requirements.

Use cases - are the pictorial representation of user centric view of the system.