Question:Write the definatiom of Branch? 

Transfer control to another part of  a program.

Question:What do you mean by decision table? 

Decision tables: 
1. Decision tables are sometimes used to plan and document processing that involves complex combinations of conditions. 
2. Decision tables are best suited to documenting complex decisions involving combinations of conditions.

Question:What do you mean by control break? 

Control break: A change in the value in a control field between consecutive records in a file.

Question:Write down the advantage and disadvantages of HIPO chart? 

Advantages: 
1. Provide more information than that of other forms of documentation.
2. The input and output for each module are clearly identified.
3. Can use to determine very easily what modules call the module being examined.

Disadvantages:
1. The main disadvantage of HIPO is that the documentation for a program gets to be rather bulky: there is a page for each module regardless of the actual size of the module.
2. HIPO charts are not as widely used as structure charts and pseudocode.

Question:Define cylinder, track, and sector. 

Cylinder: The collection of tracks of the same number on a disk, that is, the tracks that can be read from or written to with a single positioning of the accessing mechanism.
Track: One of a series of concentric rings on the surface of a magnetic disk on which data is recorded.
Sector: In computer disk storage, a sector is a subdivision of a track on a magnetic disk or optical disc. Each sector stores a fixed amount of user data.