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# Exercise Title Features Description Platform Keywords
1 Given a string s and an integer n, return a string in which each of the characters in s is repeated n times. Code Completion Given a string s and an integer n, return a string in which each of the characters in s is... CodeCheck Strings, Other String Operations
2 Given a string s, return the first vowel that is doubled in the string. Code Completion Given a string s, return the first vowel that is doubled in the string. CodeCheck Strings, Other String Operations
3 Given a string s, return the string with adjacent duplicates removed. Code Completion Given a string s, return the string with adjacent duplicates removed. For example, Mississippi yields Misisipi. CodeCheck Strings, Other String Operations
4 Given a string s and a string t, return a string in which all the characters of s that occur in t have been replaced by a _ character. Code Completion Given a string s and a string t, return a string in which all the characters of s that occur... CodeCheck Strings, Other String Operations
5 Given a string, return a string composed first of all characters at even positions and then of all characters at odd positions. Code Completion Given a string, return a string composed first of all characters at even positions and then of all characters at... CodeCheck Strings, Other String Operations
6 Given a string and two characters x and y (as strings of length 1), interchange all occurrences of x and y. Code Completion Given a string and two characters x and y (as strings of length 1), interchange all occurrences of x and... CodeCheck Strings, Other String Operations
7 Given a string s and a character c (as string of length 1), return a string with the characters surrounding the first occurrence of c reversed. Code Completion Given a string s and a character c (as string of length 1), return a string with the characters surrounding... CodeCheck Strings, Other String Operations
8 Given a string s and a character c (as string of length 1), return a string with the characters surrounding any occurrence of c reversed. Code Completion Given a string s and a character c (as string of length 1), return a string with the characters surrounding... CodeCheck Strings, Other String Operations
9 Write a method that undoes the effect of the preceding exercise. Code Completion Write a method that undoes the effect of the preceding exercise. CodeCheck Strings, Other String Operations
10 Repeating Characters of a String (Case 2) Construct a program that has a function that receives a string and creates a new string that has every other... PCEX
11 csedpad.07.IfElse.no_topic_1 Conversion of temperature from one scale to the other. PCEX
12 csedpad.09.WhileLoops.whileloops_1 Construct a program that finds the smallest divisor (other than 1) of a positive number. For example, the smallest divisor... PCEX
13 Finding the Smallest Divisor of a Positive Number Construct a program that finds the smallest divisor (other than 1) of a positive number. For example, the smallest divisor... PCEX
14 Finding the Smallest Divisor of a Positive Number Construct a program that finds the smallest divisor (other than 1) of a positive number. For example, the smallest divisor... PCEX
15 Finding the Smallest Divisor of a Positive Number Construct a program that finds the smallest divisor (other than 1) of a positive number. For example, the smallest divisor... PCEX
16 csedpad.06.If.if Given height of two players, this program finds if one player is taller than other or not. PCEX
17 Checks whether the sum of two integers are equal as the third integer Construct a function which determines whether one of the paraters is the sum of the two other parameters. jsParsons
18 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
19 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
20 csedpad.10.DoWhile.do-whileloops_1 Repeatedly prompt the user for a number between 0 and 9 until the user enters -1. Each time the user... PCEX
21 Counting the Number of Valid and Banned Product Codes (Case 1) Suppose a hypothetical company uses codes to represent its various products. A product code includes, among other information, a character... PCEX
22 Counting the Number of Valid and Banned Product Codes (Case 2) Suppose a hypothetical company uses codes to represent its various products. A product code includes, among other information, a character... PCEX
23 Counting the Number of Valid and Banned Product Codes (Case 1) Suppose a hypothetical company uses codes to represent its various products. A product code includes, among other information, a character... PCEX
24 Counting the Number of Valid and Banned Product Codes (Case 2) Suppose a hypothetical company uses codes to represent its various products. A product code includes, among other information, a character... PCEX
25 Calculating the Wage of an Employee at the Customer Service Call Center Construct a program for the payment department of a company to calculate the wage of an employee who works at... PCEX
26 Calculating the Wage of an Employee at the Customer Service Call Center Construct a program for the payment department of a company to calculate the wage of an employee who works at... PCEX
27 Finding Adjacent Consecutive Numbers in a Sequence of Integers Construct a program that checks whether a sequence of integers, entered one at a time, contains adjacent integers that are... PCEX
28 Finding Adjacent Consecutive Numbers in a Sequence of Integers. Construct a program that checks whether a sequence of integers, entered one at a time, contains adjacent integers that are... PCEX
29 Counting the Number of Valid and Banned Product Codes (Case 1) Suppose a hypothetical company uses codes to represent its various products. A product code includes, among other information, a character... PCEX
30 Counting the Number of Valid and Banned Product Codes (Case 2) Suppose a hypothetical company uses codes to represent its various products. A product code includes, among other information, a character... PCEX
31 Calculating the Wage of an Employee at the Customer Service Call Center Construct a program for the payment department of a company to calculate the wage of an employee who works at... PCEX
32 Calculating the Wage of an Employee at the Customer Service Call Center. Construct a program for the payment department of a company to calculate the wage of an employee who works at... PCEX
33 Rotating the List Values to the Left by One Position Construct a program that has a function that receives a list of values and returns the list rotated to the... PCEX
34 Rotating the List Values to the Left by One Position Construct a program that has a function that receives a list of values and returns the list rotated to the... PCEX
35 Finding Adjacent Consecutive Numbers in a Sequence of Integers Construct a program that checks whether a sequence of integers, entered one at a time, contains adjacent integers that are... PCEX
36 Finding Adjacent Consecutive Numbers in a Sequence of Integers Construct a program that checks whether a sequence of integers, entered one at a time, contains adjacent integers that are... PCEX
37 JSON Aggregate 4 You're provided a list of aircrafts and helicopter, with manufacturer information, date of manufacture and other information. Count the flights... jsParsons json, json-aggregate
38 JSON Aggregate 5 You're provided a list of aircrafts and helicopter, with manufacturer information, date of manufacture and other information. Find the minimum... jsParsons json, json-aggregate
39 Checks whether the sum of two integers are equal as the third integer Construct a program which determines whether the value of one of variables x, y, and z is the sum of... jsParsons
40 XOR Construct a program that mimics a XOR gate (exclusive or). When input_a and input_b are the same, it should print... jsParsons boolean expressions, boolean logic, if-else statement, logical operators
41 Alternate Form Bucket Hashing Proficiency Exercise Tracing Exercise User must give the result from a series of inserts using bucket hashing. This version uses a variation on bucket... OpenDSA Bucket Hashing
42 Alternate Bucket Hashing Slideshow Algorithm Visualization Slideshow showing a variation on bucket hashing where the key hashes to a slot in the table, and overflows to... OpenDSA Bucket Hashing
43 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
44 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
45 The Class for Representing a Bank Account (Case 1) Construct a class that represents a basic bank account. This class should contain data representing the name of the account’s... PCEX
46 The Class for Representing a Bank Account (Case 2) Construct a class that represents a basic bank account. This class should contain data representing the name of the account’s... PCEX
47 The Class for Representing a Bank Account (Case 1) Construct a class that represents a basic bank account. This class should contain data representing the name of the account’s... PCEX
48 The Class for Representing a Bank Account (Case 2) Construct a class that represents a basic bank account. This class should contain data representing the name of the account’s... PCEX
49 The Class for Representing a Bank Account (Case 1) Construct a class that represents a basic bank account. This class should contain data representing the name of the account’s... PCEX
50 The Class for Representing a Bank Account (Case 2) Construct a class that represents a basic bank account. This class should contain data representing the name of the account’s... PCEX
51 The Class for Representing a Bank Account (Case 1) Construct a class that represents a basic bank account. This class should contain data representing the name of the account’s... PCEX
52 The Class for Representing a Bank Account (Case 2). Construct a class that represents a basic bank account. This class should contain data representing the name of the account’s... PCEX
53 The Class for Representing a Loan (Case 1) Construct a class that represents a loan. This class should contain data representing the interest rate, loan amount, and the... PCEX
54 The Class for Representing a Loan (Case 2) Construct a class that represents a loan. This class should contain data representing the interest rate, loan amount, and the... PCEX
55 The Class for Representing a Loan (Case 1) Construct a class that represents a loan. This class should contain data representing the interest rate, loan amount, and the... PCEX
56 The Class for Representing a Loan (Case 2) Construct a class that represents a loan. This class should contain data representing the interest rate, loan amount, and the... PCEX
57 The Class for Representing a Loan (Case 1) Construct a class that represents a loan. This class should contain data representing the interest rate, loan amount, and the... PCEX
58 The Class for Representing a Loan (Case 2) Construct a class that represents a loan. This class should contain data representing the interest rate, loan amount, and the... PCEX
59 Rotating the List Values to the Left by Two Position Construct a program that has a function that receives a list of values and returns the list rotated to the... PCEX
60 Rotating the List Values to the Left by Two Position Construct a program that has a function that receives a list of values and returns the list rotated to the... PCEX
61 Binary search Binary Search operates by dividing an array in half, and then determining whether or not the target value would be... PCEX
62 Given three numbers x, y, z, determine if one of them is the sum of the two others, and then print out the equation. Code Completion Given three numbers x, y, z, determine if one of them is the sum of the two others, and then... CodeCheck Branches, Branches Without Functions