Civil Service Clerical Ability: Alphabetical Filing Practice

Read the convention before rearranging names

The CSC scope includes filing and spelling under clerical ability for the Subprofessional examination. This tutorial covers alphabetical filing only. The conventions below define our original practice exercises; they are not a claim that every CSC question or every office uses one universal filing system. Follow the instructions supplied with an actual question.

When a name is already written as “Surname, Given name,” use the surname as the first sorting field. Compare the given name only if surnames match. Compare middle initials only if the preceding fields also match and the exercise says to use them. Do not silently change the surname supplied in the record.

Within a field, compare letters from left to right in A–Z order. Move to the next position only while letters match. If one field ends after matching the entire beginning of another, put the shorter field first. Unless an exercise says otherwise, ignore differences between uppercase and lowercase letters. All examples here use unaccented letters.

Five worked examples with explicit rules

1. Different first letters

Convention: Sort the supplied surnames A–Z, ignoring letter case. Names: Santos; Aquino; Reyes; Bautista. The correct order is Aquino → Bautista → Reyes → Santos. Their first letters already decide the order: A, B, R, S. There is no need to compare the remaining letters when an earlier position differs.

2. A shared beginning

Convention: Compare each surname letter by letter, A–Z; shorter matching prefixes come first. Names: Santos; Santiago; Sanchez; Sandoval. All begin with “San.” The fourth letters divide them into c, d, and t, so Sanchez and Sandoval come first. For Santiago and Santos, compare the fifth letters, i and o. Result: Sanchez → Sandoval → Santiago → Santos.

3. Equal surnames

Convention: Sort by surname, then given name; use letter-by-letter A–Z order in each field. Records: Cruz, Mario; Cruz, Ana; Cruz, Ben. The surname cannot break the tie. Compare the given names instead: A comes before B, then M. Result: Cruz, Ana → Cruz, Ben → Cruz, Mario. Do not use the order in which the records were presented.

4. One field is a prefix of another

Convention: Sort by surname, then given name; a shorter field comes first when all its letters match the longer field's beginning. Records: Lim, Anna; Lim, Anne; Lim, Ann. “Ann” ends before the final a or e in the other names. Result: Lim, Ann → Lim, Anna → Lim, Anne. This rule is not “shortest name always first”; it applies only after a matching prefix.

5. Spaces and hyphens under a stated rule

Convention: Sort the entire supplied surname as one field, ignoring spaces, hyphens, and letter case. Names: De Vera; Dela Cruz; De-Leon. The comparison keys are devera, delacruz, and deleon. Result: Dela Cruz → De-Leon → De Vera. Compare delacruz with deleon at their fourth letters, a and e. Preserve the original spellings when writing the sorted answer.

Use a method that exposes small differences

First, separate fields mentally: surname, given name, and any later tie-breaker. Next, group records sharing a surname or prefix. Order those smaller groups, then combine them. Finally, compare each neighbouring pair in your proposed answer. If every adjacent pair is in the correct order and every record appears once, you have a useful final check.

Keep the rule and the data separate. Removing spaces for comparison does not mean deleting them from the final record. Ignoring case does not mean treating different letters as equal. If two records remain identical after all permitted comparisons, do not invent a tie-breaker such as age or submission date. The question must supply any additional rule.

Common errors include sorting by given name too early, skipping the first differing letter, and treating a surname particle differently without permission. For this guide, “De Vera” remains the complete supplied surname. Real organisations may use different conventions. Learning to follow an explicit instruction is more reliable than memorising an unstated exception.

Ten original filing exercises

Write the complete order before checking the answer section. Each exercise states its convention, including any special treatment of spaces or punctuation. There is no time limit for the first attempt. Aim to identify the deciding letter or field, not simply to guess which list looks familiar.

1. Rule: Sort surnames A–Z, ignoring case.
   Torres; Abad; Mercado; Flores.
2. Rule: Compare surnames letter by letter, A–Z.
   Ramos; Reyes; Ramirez; Razon.
3. Rule: Sort by surname, then given name, both A–Z.
   Garcia, Leo; Garcia, Ana; Garcia, Liza.
4. Rule: Sort by surname, then given name; a shorter matching prefix comes first.
   Tan, Ana; Tan, Anabel; Tan, An.
5. Rule: Sort the complete surname as one field, ignoring spaces, hyphens, and case.
   De Vera; Dela Pena; De Leon.
6. Rule: Sort by surname, then given name, then middle initial; compare each A–Z and ignore periods.
   Lopez, Ana C.; Lopez, Ana A.; Lopez, Ana B.
7. Rule: Sort the complete organisation name letter by letter, ignoring spaces and case; retain every word.
   Bay View Clinic; Bay City Clinic; Bayan Clinic.
8. Rule: Sort surnames A–Z, ignoring case. Find which surname belongs between Bautista and Cruz.
   Choices: Aquino; Castillo; Diaz; Santos.
9. Rule: Sort surnames letter by letter, A–Z.
   Santos; Santiago; Santillan; Santana.
10. Rule: Sort by surname, then given name, both A–Z.
    Reyes, Bea; Ramos, Carlo; Reyes, Ana; Ramos, Ana.

Answers and the comparison that decides each one

1. Abad → Flores → Mercado → Torres

The first letters A, F, M, and T decide every position. Check the list against the original four names to make sure none was omitted or repeated. Letter-by-letter comparison can stop immediately when the first position already establishes the order.

2. Ramirez → Ramos → Razon → Reyes

All names begin with R. The “Ra” names precede Reyes because a comes before e. Ramirez and Ramos share “Ram,” then differ at i and o. Both precede Razon because m comes before z. Compare one position at a time.

3. Garcia, Ana → Garcia, Leo → Garcia, Liza

The identical surname sends you to the given-name field. Ana comes first. Leo and Liza share L, but e precedes i. Do not compare the lengths of Leo and Liza: the differing second letter settles the order before length becomes relevant.

4. Tan, An → Tan, Ana → Tan, Anabel

All given names begin with “An.” The shortest matching prefix ends first, so An precedes Ana. Ana is itself a prefix of Anabel, so it comes next. Unlike an arbitrary shortest-first rule, this result follows from matching every available letter before comparing field endings.

5. Dela Pena → De Leon → De Vera

With spaces removed, the comparison keys are delapena, deleon, and devera. The two “del” keys precede “dev.” Between delapena and deleon, a comes before e at the fourth position. The displayed answer retains each surname's original spaces, as the rule changes comparison only.

6. Lopez, Ana A. → Lopez, Ana B. → Lopez, Ana C.

Both surname and given name match, so the stated third field breaks the tie. Ignoring periods leaves the initials A, B, and C. Using the initial before the given name would be wrong in a larger list where given names differed.

7. Bayan Clinic → Bay City Clinic → Bay View Clinic

Removing spaces produces bayanclinic, baycityclinic, and bayviewclinic. All share “bay”; their next letters are a, c, and v. This is a whole-name comparison, not word-by-word filing. Retaining every word also prevents silently discarding a term because it seems unimportant.

8. Castillo

Castillo follows Bautista because C follows B. It precedes Cruz because a precedes r after their shared initial C. Aquino comes before Bautista; Diaz and Santos come after Cruz. Check the candidate against both boundaries, not only the first name.

9. Santana → Santiago → Santillan → Santos

All share “Sant.” Their next letters are a, i, i, and o, placing Santana first and Santos last. Santiago and Santillan then differ at a and l after “Santi,” so Santiago comes before Santillan. Longer shared prefixes demand slower comparison, not a different rule.

10. Ramos, Ana → Ramos, Carlo → Reyes, Ana → Reyes, Bea

Complete the surname comparison before looking at given names: Ramos precedes Reyes. Within Ramos, Ana precedes Carlo; within Reyes, Ana precedes Bea. Putting both Ana records together would incorrectly make given name the primary sorting field and mix the surname groups.

Build accuracy before adding speed

For each error, mark the first comparison you skipped and rewrite the rule in your own words. Repeat the exercise with the names shuffled, then create a fresh set with similar prefixes. Once your untimed order is reliable, measure how long a short set takes while retaining the final adjacent-pair check.