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AfilCa [17]
3 years ago
8

A programmer wrote the code segment below to display the average of all the elements in a list called numbers. There is always a

t least one number in the list. text... The programmer wants to reduce the number of operations that are performed when the program is run. Which change will result in a correct program with a reduced number of operations performed?
Computers and Technology
1 answer:
mestny [16]3 years ago
3 0

Answer:

Swap codes in line 7 and 8

Explanation:

The code segment below

Line 1: count ← 0

Line 2: sum ← 0

Line 3: FOR EACH value IN numbers

Line 4: {

Line 5: count ← count + 1

Line 6: sum ← sum + value

Line 7: average ← sum / count

Line 8: }

Line 9: DISPLAY (average)

The above code will make the program translator calculate the average value at each iteration.

This will take a longer time to execute and also means more instructions for the program translator.

Swapping line 7 and 8 will reduce the number of instructions to execute. This will have an instant effect on the time taken to execute the program.

Swapping line 7 and 8 means that, the program translator will only calculate the average after it must have finished calculating the sum of the values in the iteration statement.

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erik [133]

Answer:

I think it is the last one. Or first. Try first though.

Explanation:

Have a Great Day.

8 0
3 years ago
(Business: check ISBN-10) An ISBN-10 (International Standard Book Number) consists of 10 digits: d1d2d3d4d5d6d7d8d9d10. The last
Aneli [31]

Answer:

 The solution code is written in Python 3

  1. digits = input("Enter 9 digits: ")
  2. multiplier = 1
  3. total = 0
  4. for x in digits:
  5.    total += int(x) * multiplier  
  6.    multiplier += 1
  7. checksum = total % 11  
  8. if(checksum == 10):
  9.    print(digits + "X")
  10. else:
  11.    print(digits + str(checksum))

Explanation:

Firstly, use input function to get user input for 9 digits (Line 1)

Next we can use a for-loop to estimate the summation (d1 * 1 + d2 * 2 + d3 * 3 + d4 * 4 + d5 * 5+ d6 * 6 + d7 * 7 + d8 * 8 + d9 * 9) ( Line 6-8)

Then only apply % operator to get the remainder of total and get the checksum (Line 10)

Next create if and else statement to print the digits string joined with X if checksum is 10 else join digits string with checksum value (Line 12 -15)

7 0
4 years ago
Given that k refers to a non-negative int value and that t has been defined and refers to a tuple with at least k+1 elements, wr
Rus_ich [418]

Answer:

The expression is "t[k]".

Explanation:

In the question, it is defined that variable k refers to positive integer and variable t refers to a tuple that holds at least k+1 element. The expression for defining the kth element of t is t[k].

  • Where variable t is tuple that collects a sequence of immutable (in-built) Python objects. To define tuple we use the parentheses.
  • The main purpose to use tuple in this question is that it cannot be changed.  

5 0
3 years ago
When computer users have trouble with their machines or software, Roland is the first person they call for help. Roland helps us
Schach [20]

Answer:

The correct answer is A) Support Analyst

Explanation:

From the question, we can see that Roland is familiar with both machines and software. He is familiar with the operations of both parts of a computer to the end that he can attempt a fix. And if he can't he knows who to refer the end-users to. Usually, some IT personnel that is more experienced.

From the above points, we can safely say that Roland is an IT Support Analyst. He cannot be the Systems analyst because Systems Analysts are usually at the top of the Pyramid. They take on problems that are referred upwards to them from support analysts.

Cheers

3 0
3 years ago
Regular languages are closed under complement. True False
aivan3 [116]

Answer: True

Explanation:

A language is said to be closed under a operation here the complement is the operation then if upon application of that operation to any members of that language always yields a member of that language.

regular languages are closed under complement. A proof of the statement is

If a regular language 'L' is regular then there is a DFA X recognizing that regular language 'L'. to show that L' (compliment) is regular we need to have another DFA X' recognizing L'.

The initial state and transition function of both the DFAs are same except their accepting state. Then we can say that X' accepts L'.

So, we can say that regular languages are closed under complement.

4 0
3 years ago
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