TCS Placement: Sample Questions 136 - 138 of 502
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Question 136
Explanation
- Data can be corrupted during transmission and hence errors must be detacted and corrected.
- Error detection uses redundancy- by adding extra bits for detecting errors.
- Error detection refers to the techniques used to detect noise or other impairments introduced into data while it is transmitted from source to destination.
- Common error detection methods are
- Vertical Redundancy Check (VRC)
- Longitudinal Redundancy Check (LRC)
- Cyclic Redundancy Check (CRC)
- Checksum
Question 137
Explanation
- It is a method for providing fault tolerance by using multiple hard disk drives. Short for redundant array of independent disks.
- Was defined as redundant array of inexpensive disks, but now refers to redundant array of inexpensive disks.
- RAID uses multiple disks to provide fault tolerance, improve performance, or to increase capacity.
- RAID is used frequently on servers but not necessary for personal computers.
Question 138
Explanation
The following are the key components of . NET Framework:
- . NET Framework Class Library
Contains a huge library of reusable types- classes, interfaces, structures, and enumerated values collectively called types.
- Common language Runtime
- Performs memory management, exception handling, debugging, security checking, thread execution, code execution, code safety, verification, and compilation.
- Code directly managed by the CLR is called the managed code. Managed code is compiled into a CPU independent intermediate language (IL) code.
- A Just In Time (JIT) compiler compiles the IL into native CPU specific code.
- Common Language Specification
Contains the specifications for the . Net supported languages and implementation of language integration.
- Windows Forms
Contains graphical representation of any window displayed in the application.
- Common Type System
Provides guidelines for declaring, using, and managing types at runtime, and cross-language communication.
- Common Language Specification
Contains specifications for the . Net supported languages and implementation of language integration.
- Runtime Host
- Provides technology for working with data and databases- providing access to data sources like SQL server, OLE DB, XML etc.
- Allows connection to data sources for retrieving, manipulating, and updating data.
- Windows CardSpace
Provides safety for accessing resources and sharing personal information on the internet.
- . NET Framework class Library
Contains a huge library of reusable types- classes, interfaces, structures, and enumerated values, which are collectively called types.
- Metadata and Assemblies
- Metadata is the binary information describing the program stored either in a portable executable file (PE) or in the memory.
- Assembly is a logical unit consisting of the assembly manifest, type metadata, IL code, and resources like image files.
- LINQ
Imparts data querying capabilities to . Net languages using syntax similar to the traditional query language like SQL.