COBOL Track Management

This page provides the Exercism community with the information and tools needed to manage the COBOL track.

Students
2,360
Submissions
42,948
Mentoring Discussions
63

The COBOL track needs attention ⚠️

Building

Practice Exercises

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Practice Exercises are exercises designed to allow students to solve an arbitrary problem, with the aim of them making use of the concepts they have learned so far.

Synced primary repo: d0981268253404873f6cbe404ac83c31f11fb182 (Updates should be instant)

Next goal: Implement at least 40 practice exercises. Find out more.
35 active practice exercises
Started
Attempts
Completions
Mentoring requests
Hello, World! Hello, World!
2,013
5,509 (avg. 2.7)
1,402 (69.6%)
0 (0.0%)
Leap Leap
991
9,130 (avg. 9.2)
317 (32.0%)
30 (3.0%)
Yacht Yacht
342
6,172 (avg. 18.0)
129 (37.7%)
13 (3.8%)
Pangram Pangram
247
2,920 (avg. 11.8)
123 (49.8%)
7 (2.8%)
Isogram Isogram
181
1,701 (avg. 9.4)
105 (58.0%)
4 (2.2%)
Rotational Cipher Rotational Cipher
134
1,983 (avg. 14.8)
86 (64.2%)
5 (3.7%)
RNA Transcription RNA Transcription
127
675 (avg. 5.3)
75 (59.1%)
0 (0.0%)
Reverse String Reverse String
197
1,733 (avg. 8.8)
108 (54.8%)
2 (1.0%)
Bob Bob
122
1,637 (avg. 13.4)
65 (53.3%)
2 (1.6%)
Collatz Conjecture Collatz Conjecture
103
752 (avg. 7.3)
56 (54.4%)
0 (0.0%)
Difference of Squares Difference of Squares
84
510 (avg. 6.1)
43 (51.2%)
0 (0.0%)
Hamming Distance Hamming Distance
89
438 (avg. 4.9)
45 (50.6%)
0 (0.0%)
Two-Fer Two-Fer
71
507 (avg. 7.1)
50 (70.4%)
1 (1.4%)
Raindrops Raindrops
51
698 (avg. 13.7)
38 (74.5%)
3 (5.9%)
Luhn Algorithm Luhn Algorithm
96
1,566 (avg. 16.3)
43 (44.8%)
1 (1.0%)
Darts Darts
104
586 (avg. 5.6)
52 (50.0%)
1 (1.0%)
Sieve Sieve
30
447 (avg. 14.9)
19 (63.3%)
0 (0.0%)
Armstrong Numbers Armstrong Numbers
127
1,297 (avg. 10.2)
67 (52.8%)
1 (0.8%)
Square Root Square Root
62
184 (avg. 3.0)
41 (66.1%)
2 (3.2%)
Nucleotide Count Nucleotide Count
45
221 (avg. 4.9)
36 (80.0%)
0 (0.0%)
Roman Numerals Roman Numerals
47
864 (avg. 18.4)
26 (55.3%)
1 (2.1%)
Triangle Triangle
58
697 (avg. 12.0)
31 (53.4%)
0 (0.0%)
Scrabble Score Scrabble Score
31
258 (avg. 8.3)
24 (77.4%)
0 (0.0%)
Queen Attack Queen Attack
31
445 (avg. 14.4)
24 (77.4%)
0 (0.0%)
High Scores High Scores
24
478 (avg. 19.9)
11 (45.8%)
0 (0.0%)
Allergies Allergies
33
520 (avg. 15.8)
14 (42.4%)
1 (3.0%)
Acronym Acronym
20
202 (avg. 10.1)
8 (40.0%)
0 (0.0%)
All Your Base All Your Base
9
228 (avg. 25.3)
3 (33.3%)
0 (0.0%)
Atbash Cipher Atbash Cipher
11
80 (avg. 7.3)
4 (36.4%)
0 (0.0%)
Binary Binary
10
80 (avg. 8.0)
5 (50.0%)
0 (0.0%)
Circular Buffer Circular Buffer
11
104 (avg. 9.5)
4 (36.4%)
0 (0.0%)
Complex Numbers Complex Numbers
11
47 (avg. 4.3)
4 (36.4%)
0 (0.0%)
Matching Brackets Matching Brackets
15
122 (avg. 8.1)
4 (26.7%)
0 (0.0%)
Protein Translation Protein Translation
2
2 (avg. 1.0)
1 (50.0%)
0 (0.0%)
Pascal's Triangle Pascal's Triangle
9
155 (avg. 17.2)
3 (33.3%)
0 (0.0%)
95 unimplemented practice exercises
Affine Cipher Affine Cipher
Alphametics Alphametics
Anagram Anagram
Bank Account Bank Account
Binary Search Binary Search
Binary Search Tree Binary Search Tree
Book Store Book Store
Bottle Song Bottle Song
Bowling Bowling
Change Change
Clock Clock
Connect Connect
Conway's Game of Life Conway's Game of Life
Crypto Square Crypto Square
Custom Set Custom Set
D&D Character D&D Character
Diamond Diamond
Dominoes Dominoes
DOT DSL DOT DSL
Eliud's Eggs Eliud's Eggs
Error Handling Error Handling
ETL ETL
Flatten Array Flatten Array
Food Chain Food Chain
Forth Forth
Gigasecond Gigasecond
Go Counting Go Counting
Grade School Grade School
Grains Grains
Grep Grep
Hangman Hangman
House House
ISBN Verifier ISBN Verifier
Killer Sudoku Helper Killer Sudoku Helper
Kindergarten Garden Kindergarten Garden
Knapsack Knapsack
Largest Series Product Largest Series Product
Ledger Ledger
Lens Person Lens Person
Linked List Linked List
List Ops List Ops
Markdown Markdown
Matrix Matrix
Meetup Meetup
Micro Blog Micro Blog
Minesweeper Minesweeper
Nth Prime Nth Prime
OCR Numbers OCR Numbers
PaaS I/O PaaS I/O
Palindrome Products Palindrome Products
Parallel Letter Frequency Parallel Letter Frequency
Perfect Numbers Perfect Numbers
Phone Number Phone Number
Pig Latin Pig Latin
Poker Poker
POV POV
Prime Factors Prime Factors
Proverb Proverb
Pythagorean Triplet Pythagorean Triplet
Rail Fence Cipher Rail Fence Cipher
Rational Numbers Rational Numbers
React React
Rectangles Rectangles
Resistor Color Resistor Color
Resistor Color Duo Resistor Color Duo
Resistor Color Trio Resistor Color Trio
REST API REST API
Robot Name Robot Name
Robot Simulator Robot Simulator
Run-Length Encoding Run-Length Encoding
Saddle Points Saddle Points
Satellite Satellite
Say Say
Secret Handshake Secret Handshake
Series Series
SGF Parsing SGF Parsing
Simple Cipher Simple Cipher
Simple Linked List Simple Linked List
Space Age Space Age
Spiral Matrix Spiral Matrix
State of Tic-Tac-Toe State of Tic-Tac-Toe
Strain Strain
Sublist Sublist
Sum of Multiples Sum of Multiples
Tournament Tournament
Transpose Transpose
Tree Building Tree Building
Twelve Days Twelve Days
Two Bucket Two Bucket
Variable Length Quantity Variable Length Quantity
Word Count Word Count
Word Search Word Search
Wordy Wordy
Zebra Puzzle Zebra Puzzle
Zipper Zipper

Programming Tags

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Help manage the tags used to group, filter and recommend solutions, approaches and articles.

0 tags

Test Runner

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Create Test Runners that have the single responsibility of taking a solution, running all tests and returning a standardized output.

Current version: c33dffa49fa65de750fb34fe3022ee412f31b853 (Takes up to 10 mins to deploy)

Next goal: Get Test Runners to Version 2. COBOL is currently utilising a Version 1 Test Runner. Find out more.
Total Test Runner Runs
42,726
Test Run Pass Rate
15.7% (6696)
Test Run Fail Rate
83.2% (35544)
Test Run Error Rate
1.1% (486)

Representer

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Build a Representer: a bit of code that has the single responsibility of taking a solution and returning a normalized representation of it.

Next goal: Build a Representer. Find out more.

Analyzer

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Build an Analyzer for COBOL: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Next goal: Build an Analyzer. Find out more.