Explain entity-relationship (ER) diagrams.
What will be an ideal response?
Entity-relationship (ER) diagrams use basic graphical symbols to show an organization of and relationships between data. In other words, ER diagrams show data items in tables (entities) and the ways they are related. ER diagrams help ensure that the relationships among the data entities in a database are correctly structured so that any application programs developed are consistent with business operations and user needs. In addition, ER diagrams can serve as reference documents after a database is in use. If changes are made to the database, ER diagrams help design them.
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A) Print Screen Tool B) Snipping Tool C) Capture Tool D) Screen Shot Tool
A(n) ____________________ character is displayed on screen to indicate that command language operating system is waiting for input.
Fill in the blank(s) with the appropriate word(s).
Dan is a good, but not great, chess player. Based on past tournament experience, his chances of winning any single game are 
. What is the probability that he will lose all five games?
A. 
B. 
C. 
D. 
E. 
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A. USB thumb drive B. Cooling fan C. CMOS battery D. Power supply E. Motherboard