What is the time complexity of searching for a substring in a string using the Knuth-Morris-Pratt algorithm?
A) O(n)
B) O(m + n)
C) O(n^2)
D) O(m)
Answer: B) O(m + n)
Which of the following algorithms is used for pattern matching in strings?
A) Quick Sort
B) Merge Sort
C) Rabin-Karp Algorithm
D) Dijkstra’s Algorithm
Answer: C) Rabin-Karp Algorithm
What is the primary use of the Levenshtein distance algorithm?
A) To find the shortest path in a graph
B) To measure the similarity between two strings
C) To sort strings alphabetically
D) To concatenate strings
Answer: B) To measure the similarity between two strings
Which algorithm is commonly used for finding the longest common subsequence?
A) Dynamic Programming
B) Greedy Algorithm
C) Divide and Conquer
D) Backtracking
Answer: A) Dynamic Programming
What does the Boyer-Moore algorithm primarily optimize?
A) Memory usage
B) Pattern matching efficiency
C) String sorting
D) Substring searching
Answer: B) Pattern matching efficiency
In which scenario is the Rabin-Karp algorithm most efficient?
A) When searching for a single character
B) When the pattern is long and there are many patterns
C) When searching for patterns in sorted strings
D) When using a small alphabet
Answer: B) When the pattern is long and there are many patterns
What is the primary advantage of using tries for string storage?
A) Fast substring searching
B) Efficient memory usage
C) Fast insertion and deletion operations
D) Easy to implement
Answer: A) Fast substring searching
Which of the following is NOT a string manipulation operation?
A) Concatenation
B) Insertion
C) Sorting
D) Compiling
Answer: D) Compiling
What does the term ‘string hashing’ refer to?
A) Converting a string into a numerical value
B) Breaking a string into characters
C) Sorting a string alphabetically
D) Finding the length of a string
Answer: A) Converting a string into a numerical value
Which algorithm is used to find the longest palindromic substring?
A) Manacher’s Algorithm
B) KMP Algorithm
C) Rabin-Karp Algorithm
D) Aho-Corasick Algorithm
Answer: A) Manacher’s Algorithm
What is the worst-case time complexity of the naive substring search algorithm?
A) O(n)
B) O(m + n)
C) O(n^2)
D) O(m^2)
Answer: C) O(n^2)
What does the ‘replace’ operation in string manipulation do?
A) Deletes a substring
B) Replaces occurrences of a substring with another substring
C) Splits a string into an array
D) Appends characters to a string
Answer: B) Replaces occurrences of a substring with another substring
Which method is used to convert a string to lowercase in many programming languages?
A) lower()
B) toLowerCase()
C) convertToLower()
D) makeLower()
Answer: B) toLowerCase()
What is a common application of the Z algorithm?
A) Sorting strings
B) Pattern matching
C) String comparison
D) String reversal
Answer: B) Pattern matching
What does the ‘split’ operation do in string manipulation?
A) Merges two strings
B) Divides a string into substrings based on a delimiter
C) Removes characters from a string
D) Appends characters to a string
Answer: B) Divides a string into substrings based on a delimiter
Which string manipulation algorithm uses a sliding window technique?
A) Rabin-Karp
B) KMP
C) Longest Common Substring
D) Longest Palindromic Substring
Answer: D) Longest Palindromic Substring
What is the purpose of the ‘trim’ operation in string manipulation?
A) To sort a string
B) To remove leading and trailing whitespace
C) To find the length of a string
D) To convert a string to uppercase
Answer: B) To remove leading and trailing whitespace
Which of the following is a property of immutable strings?
A) Strings can be modified after creation
B) Memory is reused
C) Strings cannot be changed once created
D) Strings are stored in a heap
Answer: C) Strings cannot be changed once created
What does the ‘substring’ operation do?
A) Returns the entire string
B) Creates a new string from a portion of the original string
C) Deletes a portion of the string
D) Sorts the characters in the string
Answer: B) Creates a new string from a portion of the original string
Which algorithm is used to compare two strings for equality?
A) Boyer-Moore
B) Knuth-Morris-Pratt
C) Simple comparison
D) Z Algorithm
Answer: C) Simple comparison
What is a common application of string manipulation algorithms in natural language processing?
A) Text classification
B) Image processing
C) Video analysis
D) Data compression
Answer: A) Text classification
Which data structure is commonly used to implement a trie?
A) Array
B) Linked List
C) Tree
D) Hash Table
Answer: C) Tree
What is the purpose of a suffix tree?
A) To store only unique substrings
B) To provide fast substring searching
C) To compress strings
D) To sort strings
Answer: B) To provide fast substring searching
What is the time complexity of the Boyer-Moore algorithm in the average case?
A) O(m + n)
B) O(n)
C) O(n^2)
D) O(m)
Answer: A) O(m + n)
Which of the following is a greedy algorithm for string manipulation?
A) Huffman Coding
B) Dynamic Programming
C) Binary Search
D) Merge Sort
Answer: A) Huffman Coding
What is the purpose of using character encoding in strings?
A) To compress strings
B) To convert strings into numerical values
C) To represent characters in bytes
D) To sort strings
Answer: C) To represent characters in bytes
Which operation can be performed to check if a string is a palindrome?
A) Reverse the string and compare
B) Count the characters
C) Sort the string
D) Remove whitespace
Answer: A) Reverse the string and compare
What is the main advantage of using string interning?
A) Reduces memory usage
B) Increases performance
C) Simplifies string operations
D) Allows for easy comparison
Answer: A) Reduces memory usage
Which of the following methods would you use to join an array of strings?
A) concatenate()
B) join()
C) merge()
D) append()
Answer: B) join()
What is the main difference between shallow and deep copying of strings?
A) Shallow copies the data, deep copies references
B) Shallow copies references, deep copies the data
C) There is no difference
D) Shallow copying is faster
Answer: B) Shallow copies references, deep copies the data
In which application are string manipulation algorithms often used?
A) Image processing
B) Web scraping
C) Sorting numbers
D) Graph algorithms
Answer: B) Web scraping
What is the time complexity of the naive algorithm for finding all occurrences of a substring?
A) O(n)
B) O(m + n)
C) O(n^2)
D) O(m^2)
Answer: C) O(n^2)
What is the output of the ‘reverse’ operation on the string “hello”?
A) “olleh”
B) “hello”
C) “he”
D) “world”
Answer: A) “olleh”
Which algorithm is used for compressing strings?
A) Run-Length Encoding
B) Merge Sort
C) Dijkstra’s Algorithm
D) Bubble Sort
Answer: A) Run-Length Encoding
What does a regular expression do in string manipulation?
A) Sorts strings
B) Searches and manipulates text based on patterns
C) Converts strings to numbers
D) Formats strings
Answer: B) Searches and manipulates text based on patterns
What is the main purpose of the Knuth-Morris-Pratt algorithm?
A) To sort strings
B) To find the longest common substring
C) To efficiently search for substrings
D) To remove duplicates from strings
Answer: C) To efficiently search for substrings
Basic Concepts
Non-Linear Data Structures MCQs
Sorting and Searching Algorithms MCQs
- Data Structures MCQs 1
- Data Structures MCQs 2
- Data Structures MCQs 3
- Data Structures MCQs 4
- Data Structures MCQs 5
- Stacks Solved MCQs
- Queues MCQs
- pointer mcqs
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