What are the types of data dependence?
Table of Contents
What are the types of data dependence?
There are three types of dependencies: data, name, and control.
What is meant by raw hazard and WAW hazard?
There are mainly three types of data hazards: 1) RAW (Read after Write) [Flow/True data dependency] 2) WAR (Write after Read) [Anti-Data dependency] 3) WAW (Write after Write) [Output data dependency]
What is dependency injection and how does it work?
Dependency injection is a programming technique that makes a class independent of its dependencies. It achieves that by decoupling the usage of an object from its creation. This helps you to follow SOLID’s dependency inversion and single responsibility principles.
What is data dependence in database?
An application program that deals with data stored externally to it (such as in a file or a database) includes in its source code some structural definition of that data. The extent to which that program is exposed to changes made to that external source is called data dependence.
What is the difference between data dependence and data independence?
Structural independence exists when changes in the database structure do not affect DBMS ability to access data. Structural dependence exists when changes in the database structure do not affect DBMS ability to access data.
Why is waw a hazard?
A WAW hazard occurs when two values are “written out of order.” The following code may produce a WAW hazard. The result is that later instructions see the wrong value in the register.
What is IoC and dependency injection?
Dependency Injection is the method of providing the dependencies and Inversion of Control is the end result of Dependency Injection. IoC is a design principle where the control flow of the program is inverted. Dependency Injection is one of the subtypes of the IOC principle.
What is the benefit of dependency injection?
A basic benefit of dependency injection is decreased coupling between classes and their dependencies. By removing a client’s knowledge of how its dependencies are implemented, programs become more reusable, testable and maintainable.
Why do we need data independence?
Data independence helps you to keep data separated from all programs that make use of it. You can use this stored data for computing and presentation. In many systems, data independence is an essential function for components of the system.
What is Waw in pipeline?
Write after write (WAW) ( i2 tries to write an operand before it is written by i1 ) A write after write (WAW) data hazard may occur in a concurrent execution environment. Example For example: i1. R2 <- R4 + R7 i2. R2 <- R1 + R3. The write back (WB) of i2 must be delayed until i1 finishes executing.
How can pipeline hazards be prevented?
To avoid control hazards microarchitectures can:
- insert a pipeline bubble (discussed above), guaranteed to increase latency, or.
- use branch prediction and essentially make educated guesses about which instructions to insert, in which case a pipeline bubble will only be needed in the case of an incorrect prediction.
Which type of dependency injection is best?
Setter Injection is the preferred choice when a number of dependencies to be injected is a lot more than normal, if some of those arguments are optional than using a Builder design pattern is also a good option. In Summary, both Setter Injection and Constructor Injection have their own advantages and disadvantages.
