3.2.4 Data verification tools Quiz: OCR IT, Unit 1

The 20 questions

1. Which verification tool requires a user to enter the same value twice and compares the two entries?

   • Range check
   • Lookup
   • Input mask
   • Double entry

2. Which verification tool involves a person comparing entered data with the original source?

   • Format check
   • Limited choice
   • Manual checking
   • Presence check

3. What is the primary purpose of a data verification tool?

   • Format data types
   • Check data accuracy
   • Compress file size
   • Encrypt user files

4. How does double entry help to reduce user error?

   • Highlights typing mismatches
   • Tests formula logic
   • Deletes duplicate files
   • Blocks invalid formats

5. What does a mismatch between two typed entries indicate?

   • Network timeout
   • Storage failure
   • Typing error
   • System crash

6. A team checks 200 entries line by line against the paper forms. Which technique is this?

   • Double entry
   • Range check
   • Manual checking
   • Lookup

7. What is a main limitation of manual checking?

   • Slow and tiring
   • Deletes source files
   • Always too costly
   • Requires advanced coding

8. Why might double entry fail to catch a source error?

   • Both entries match
   • Range is exceeded
   • Format is invalid
   • Data is missing

9. What does matching double-entry data actually confirm?

   • Valid postcode area
   • Correct source data
   • Accurate copying
   • Sensible data format

10. Which data verification tool is named in the specification alongside manual checking?

    • Format check
    • Range check
    • Double entry
    • Presence check

11. A clerk compares a printed sheet of 50 numbers with the screen entries and marks any mismatches. What is this?

    • Presence checking
    • Limited choice
    • Manual checking
    • Range checking

12. What does data verification check, unlike validation?

    • Data type
    • Value range
    • Field length
    • Source match

13. A form asks a user to re-enter their email address to confirm it. Which verification tool is this?

    • Presence check
    • Input mask
    • Double entry
    • Lookup

14. Why might staff check entered data against original mark sheets?

    • Confirm entry accuracy
    • Format spreadsheet cells
    • Apply validation rules
    • Calculate total scores

15. What type of error is left undetected by verifying typed values?

    • Duplicate entry error
    • Keying spelling mistake
    • Transposition typo
    • Formula logic error

16. What distinguishes double entry verification from manual checking?

    • Checking digit algorithms
    • Comparing two typed copies
    • Checking against paper source
    • Using automated validation rules

17. Which tool catches wrong values that pass a range check?

    • Presence check
    • Length check
    • Source comparison
    • Type check

18. Why must data verification occur after initial data entry?

    • Files must be deleted
    • Backups must finish
    • Encryption must start
    • Data must exist

19. Which error type is double entry best at catching?

    • Missing fields
    • Out of range
    • Incorrect source
    • Typing mistakes

20. Why are verification tools ineffective with incorrect source data?

    • Requires range rules
    • Deletes source files
    • Blocks valid numbers
    • Only checks copy

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