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# Exercise Title Features Description Platform Keywords
1 Alphabetic Order Alphabetic Order AnnEx order by
2 Alphabetic Order pt This is the portuguese version. AnnEx order by
3 Order-by query execution 1 Order-by query execution 1 DBQA
4 Order-by query execution 2 Order-by query execution 2 DBQA
5 Order-by query execution 3 Order-by query execution 3 DBQA
6 Order-by query execution 4 Order-by query execution 4 DBQA
7 Order-By question4 Order-By question4 SQL-KnoT
8 Rotating the Array Values to the Left by One Position Construct a program that has a method that receives an array of values and returns the array rotated to the... PCEX arrays
9 Rotating the Array Values to the Left by Two Position Construct a program that has a method that receives an array of values and returns the array rotated to the... PCEX arrays
10 Rotating the Array Values to the Left by Two Position Construct a program that has a method that receives an array of values and returns the array rotated to the... PCEX arrays
11 Selection sort Ascending-order Selection sort operates by finding the minimum element of an array and moving it to the “beginning” of the... PCEX recursion, search algorithms, sorting, sorting algorithms
12 Selection sort Challenge Descending-order Selection sort operates by finding the maximum element of an array and moving it to the “beginning” of the... PCEX
13 Tree traversal. The tree can be traversed by deciding on a sequence to visit each node. There are three traversal algorithms: in-order... PCEX binary search, trees
14 Tree traversal. Challenge The tree can be traversed by deciding on a sequence to visit each node. There are three traversal algorithms: in-order... PCEX trees
15 Insertion Sort Insertion sort works similarly to how one would sort a hand of cards: by choosing an element and searching through... PCEX recursion, search algorithms, sorting, sorting algorithms
16 Insertion Sort Challenge Insertion sort works similarly to how one would sort a hand of cards: by choosing an element and searching through... PCEX
17 Construct a program with multiple if-elif statements Construct a program which checks which of the integers in interval from 1 to 50 is divisible by only 2,... jsParsons
18 Breadth-First Search Graph Traversal Proficiency Exercise Tracing Exercise Proficiency exercise for breadth-first search to traverse a graph. User must indicate the order in which nodes are visited by... OpenDSA Breadth-First Search
19 Depth-First Search Graph Traversal Proficiency Exercise Tracing Exercise Proficiency exercise for depth-first search to traverse a graph. User just indicate the order in which nodes are visited by... OpenDSA Depth-First Search
20 Kruskal's Minimal-Cost Spanning Tree Proficiency Exercise Tracing Exercise Proficiency exercise for Kruskal's minimal-cost spanning tree. User must indicate the order in which nodes are visited by clicking on... OpenDSA Minimal-Cost Spanning Tree
21 Prim's Minimal-Cost Spanning Tree Proficiency Exercise Tracing Exercise Proficiency exercise for Prim's minimal-cost spanning tree. User must indicate the order in which nodes are visited by clicking on... OpenDSA Minimal-Cost Spanning Tree
22 Rotating the Array Values Construct a program that has a method that receives an array of values and returns the array rotated to the... PCEX arrays
23 Rotating the List Values Construct a program that has a function that receives a list of values and returns the list rotated to the... PCEX algorithm analysis, classes, data structures, list, stacks
24 Rotating the List Values (Case 2) Construct a program that has a function that receives a list of values and returns the list rotated to the... PCEX list
25 An enum type describing chemical elements Code Completion Enumerated types in Java are quite powerful, in that they can contain methods and instance variables. An enum type class... CodeCheck Inheritance
26 Selection sort modification placing even before odd Code Completion Implement a modification of the SelectionSorter class that reorders the array to have even elements followed by odd ones. Follow... CodeCheck Sorting and Searching