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Leno4ka [110]
3 years ago
9

Which statements are true about a database?

Computers and Technology
2 answers:
anzhelika [568]3 years ago
6 0

Answer:

you cannot leave a field empty

you can enter data based on the defined data type

OverLord2011 [107]3 years ago
5 0

Answer:

You can enter data based on the defined data type.

A primary key uniquely identifies a record.

Explanation:

In a database, you can only enter data that matches the data type you have specified for that field. Therefore, you can enter text in fields with the text data type; numbers in fields with the number data type; or images in fields with the BLOb data type. You can have fields where data entry is optional. A primary key eliminates the chance of duplicate entries of the same record in a table.

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If a class has member variables that are pointers, you must ensure that you implement ____.
DedPeter [7]

Answer:

objects

Explanation:

pointer are used for the objects

5 0
3 years ago
Weak Induction
slega [8]

Answer:

Following are the answer to this question:

Explanation:

In option 1:

The value of n is= 7, which is (base case)

\to 3^7

when n=k for the true condition:

\to 3^k

when n=k+1 it tests the value:

\to 3^{(k+1)}= 3^k,3\\\to < (k!) 3 \ substituting \ equation \\\to

since k>6  hence the value is KH>3 hence proved.

In option 2:

when:

for n=1:(base case)

\log(1!)

0<=0 \\ condition is true

when the above statement holds value n=1

when n=k

\log(k!)

when n=k+1

\log(k+1)!=\log(k!)+\log(k+1)\\

             

\because k \log k      [\therefore KH>K \Rightarrow  \log(KH>\loK)]

In option 3:

when n=1:

A_1 \cup B=A_1 \cup B\\\\

when n=k

\to (A_1\cap A_2 \cap.....A_k) \cup B\\=(A_1\cup B) \cap(A_2\cup B_2)....(A_k \capB).....(a)\\\to n= k+1\\ \to (A_1\cap A_2 \cap.....A_{kH}) \cup B= (A_1\cup B)\\\\\to  [(A_1\cap A_2 \cap.....A_{k}) \cup B]\cap (A_{KH}\cup B)\\\\\to  [(A_1\cup B) \cap (A_2 \cup B) \cap (A_3\cup B).....(A_k\cup B)\cap (A_{k+1} \cup B)\\\\  \ \ \ \ \ \ substituting \ equation \ a \\\\

hence n=k+1 is true.

7 0
3 years ago
What will the output be from the following program?
ser-zykov [4K]

Answer:

3 + 4 hope it helps for you

Explanation:

mark brainest

7 0
3 years ago
In Python write a program that reads a list of integers into a list as long as the integers are greater than zero, then outputs
stealth61 [152]

Answer:

l = []

while True:

 no = int(input())

 if no>0:

   l.append(no)

 else:

   break

print(1)

If this helped consider marking this answer as brainliest. Have a good day.

3 0
2 years ago
A store sells rope only in whole-foot increments. Given three lengths of rope, in feet, the following code segment is intended t
Nonamiya [84]

Answer:

The correct option is option 3 which is The code segment works as intended but only when the sum of the three lengths is an integer or the decimal part of the sum of the three lengths is greater than or equal to 0.5.

Explanation:

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7 0
3 years ago
Read 2 more answers
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