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ki77a [65]
2 years ago
11

True or false questions:

Computers and Technology
1 answer:
mash [69]2 years ago
5 0
My answers are just from my personal knowledge.
1. False
2. False
3. True 
4. True
5. False 
6. True
7. True 
8. True
9. True 
10. True
11. True 
12. False
13. False
14. False
15. True

I believe these are the answers!


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In the belt drive mechanism, what happens when the belt is crossed instead of open?
KengaRu [80]
They will spin in the opposite direction because the belts are twisted.
8 0
3 years ago
The following SQL statement uses a(n) _____. SELECT P_CODE, P_DESCRIPT, P_PRICE, V_NAME FROM PRODUCT, VENDOR WHERE PRODUCT.V_COD
Trava [24]

Answer:

The answer is c. “old-style” join.

Explanation:

SELECT P_CODE, P_DESCRIPT, P_PRICE, V_NAME

FROM PRODUCT, VENDOR

WHERE PRODUCT.V_CODE = VENDOR.V_CODE;

The SELECT clause represents all the columns to be displayed.

The FROM clause represents the tables which are used to extract the columns.

The WHERE clause shows the common column that exists in both the tables. This represents the old-style join when JOIN keyword was not used.

The tables are joined in two ways.

1. Using JOIN keyword

The syntax for this is given as

SELECT column1, column2

FROM table1 JOIN table2

ON table1.column3 = table2.column3;

This returns all rows from two tables having the same value of common column.

Two tables are taken at a time when JOIN keyword is used.

If more tables are to be used, they are mentioned as follows.

SELECT column1, column2

FROM table1 JOIN table2

ON table1.column3 = table2.column3

JOIN table3

ON table3.column4 = table1.column4

( ON table3.column5 = table2.column5 )  

The part in italics shows that the third table can either share the same column with table1 or table2.

The given query can be re-written using JOIN as shown.

SELECT P_CODE, P_DESCRIPT, P_PRICE, V_NAME

FROM PRODUCT JOIN VENDOR

ON PRODUCT.V_CODE = VENDOR.V_CODE;

2. Equating common column in WHERE clause

SELECT column1, column2

FROM table1, table2

WHERE table1.column3 = table2.column3;

This returns all rows from two tables having the same value of the common column.

Here, no keyword is used except the general syntax of the query. ON keyword as shown in the above example is replaced with WHERE.

Tables to be used are mentioned in FROM clause separated by commas.

Tables are joined based on the same column having same values.

Multiple tables can be joined using this style as follows.

SELECT column1, column2

FROM table1, table2, table3, table4

WHERE table1.column3 = table2.column3

AND table3.column5=table1.column5

AND table3.column4 = table2.column4;

5 0
3 years ago
What is the default junk email protection in Outlook 2016?
Shtirlitz [24]
The answer to ur question is D
4 0
3 years ago
Read 2 more answers
Average LCD panels are around _______________, which most monitor authorities consider excellent brightness.
uysha [10]

Answer:

The correct answer to the following question will be option D. 300 nits.

Explanation:

LCD Monitors: LCD stands for Liquid Crystal Display, the display which uses two sheets of liquid crystal with polarizing material between the sheets and also known as Flat panel monitor.

  • Each of the crystal in LCD's is like a shutter, it either allows to pass the light or it blocks the light. There is a fixed type of resolution in LCD
  • LCD panels can be easily moved around all, lightweight, compact and small in size.
  • An average 17-inch LCD monitor could be around 15 pounds, upwards 300 nits which gives the perfect brightness.

So, Option D is the correct answer.

3 0
2 years ago
Comments should
suter [353]

Answer:

Correct answer is:

communicate the purpose of the code that follows it.

Explanation:

Let have a look at each option

comment should give the reader the background of the programmer.

Comments are unable to do so.

Be written on every line

No, it is not need as comment are useful only to explain difficult or complex part of code.

communicate the purpose of the code that follows it.

yes, this option is true, as comments will give hints to programmer about the piece of code.

give information about how many hours it took to write the code

No, comments can answer it,

3 0
2 years ago
Read 2 more answers
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