IT Cambridge National Revision - Data and Testing
(Module 3) with all Correct & 100% Verified Answers |
Guaranteed to Pass
what is the definition of information ✔Correct Answer-data that has been given meaning and
has been processed
definition of data ✔Correct Answer-raw facts and figure that have not been processed
relationship formula for information and data ✔Correct Answer-
information=data+context+meaning+structure
what are the 5 data types ✔Correct Answer--alphanumerical (includes letters and numbers)
-Boolean (only has two responses)
-date/time(range of dates and time formats)
-text(any possible character)
-numeric(number in a variety of ways)
what are the 5 types of numeric data ✔Correct Answer-- real( e.g. pi)
-percentage
-currency
-decimal
-integer
what is validation ✔Correct Answer-checks that the data is sensible and reasonable but
doesn't check that the data is correct.
what is verification ✔Correct Answer-checks the data matches the original data but doesn't
check the data is correct. This could be double entry or manual checking.
what are the 8 data validation tools ✔Correct Answer-- data type check
-format check
-input mask
- length check
- limited choice
- lookup
- presence check
- range check
what is the data type check ✔Correct Answer-is the data entered using the correct data type
, what is the format check ✔Correct Answer-is the data entered in the expected format e.g. if it
a date , has it been entered in the dd/mm/yy format
what is the input mask ✔Correct Answer-is the data been entered in the expected way e.g. a
postcodes looks like LLNN NLL
what is length check ✔Correct Answer-is the data the expected minimum length
what is limited choice ✔Correct Answer-is the data you want to enter on the list provided
what is presence check ✔Correct Answer-has the data been entered
what is range check ✔Correct Answer-has the data entered within a specific range e.g. is the
data between 1 and 6 for a dice roll
advantages of using email as a primary data collection ✔Correct Answer--can be sent to
multiple people at the same time
-Results to emails can be automatically input into software for analysis/manipulation
disadvantages of using email as a primary data collection ✔Correct Answer--emails may be
diverted to spam/junk folders
-If the data types are not exactly the same as the types being used for analysis/manipulation ,
then collected data may be worthless .
advantages of interview as a primary data collection ✔Correct Answer--questions can be
modified based on answers given
-a rapport can be developed between the interviewer and interviewee which may result in
questions being answered honestly
-additional questions can be asked to clarify any answers already given
disadvantages of interview as a primary data collection ✔Correct Answer--can be time
consuming and costly to carry out
-poor interviewing can lead to misleading or insufficient data being gathered
-it is not suitable for gathering data from large numbers of people
advantage of online questionnaire/survey as a primary data collection ✔Correct Answer--
large number of people can be asked to fill in the survey at the same time
-comparisons are easy to formulate
-cheaper than interviewing large numbers of people
disadvantage of online questionnaire/survey as a primary data collection ✔Correct Answer--
means people need the technology to be able to complete them
-a badly designed question may not get the data required in the right format
(Module 3) with all Correct & 100% Verified Answers |
Guaranteed to Pass
what is the definition of information ✔Correct Answer-data that has been given meaning and
has been processed
definition of data ✔Correct Answer-raw facts and figure that have not been processed
relationship formula for information and data ✔Correct Answer-
information=data+context+meaning+structure
what are the 5 data types ✔Correct Answer--alphanumerical (includes letters and numbers)
-Boolean (only has two responses)
-date/time(range of dates and time formats)
-text(any possible character)
-numeric(number in a variety of ways)
what are the 5 types of numeric data ✔Correct Answer-- real( e.g. pi)
-percentage
-currency
-decimal
-integer
what is validation ✔Correct Answer-checks that the data is sensible and reasonable but
doesn't check that the data is correct.
what is verification ✔Correct Answer-checks the data matches the original data but doesn't
check the data is correct. This could be double entry or manual checking.
what are the 8 data validation tools ✔Correct Answer-- data type check
-format check
-input mask
- length check
- limited choice
- lookup
- presence check
- range check
what is the data type check ✔Correct Answer-is the data entered using the correct data type
, what is the format check ✔Correct Answer-is the data entered in the expected format e.g. if it
a date , has it been entered in the dd/mm/yy format
what is the input mask ✔Correct Answer-is the data been entered in the expected way e.g. a
postcodes looks like LLNN NLL
what is length check ✔Correct Answer-is the data the expected minimum length
what is limited choice ✔Correct Answer-is the data you want to enter on the list provided
what is presence check ✔Correct Answer-has the data been entered
what is range check ✔Correct Answer-has the data entered within a specific range e.g. is the
data between 1 and 6 for a dice roll
advantages of using email as a primary data collection ✔Correct Answer--can be sent to
multiple people at the same time
-Results to emails can be automatically input into software for analysis/manipulation
disadvantages of using email as a primary data collection ✔Correct Answer--emails may be
diverted to spam/junk folders
-If the data types are not exactly the same as the types being used for analysis/manipulation ,
then collected data may be worthless .
advantages of interview as a primary data collection ✔Correct Answer--questions can be
modified based on answers given
-a rapport can be developed between the interviewer and interviewee which may result in
questions being answered honestly
-additional questions can be asked to clarify any answers already given
disadvantages of interview as a primary data collection ✔Correct Answer--can be time
consuming and costly to carry out
-poor interviewing can lead to misleading or insufficient data being gathered
-it is not suitable for gathering data from large numbers of people
advantage of online questionnaire/survey as a primary data collection ✔Correct Answer--
large number of people can be asked to fill in the survey at the same time
-comparisons are easy to formulate
-cheaper than interviewing large numbers of people
disadvantage of online questionnaire/survey as a primary data collection ✔Correct Answer--
means people need the technology to be able to complete them
-a badly designed question may not get the data required in the right format
