String Processing u0026 Validation Quiz: Test Your Skills! Quiz

1. Question 1

   Which of the following methods is most appropriate for checking if a string in Java starts with a specific prefix, ignoring case?

   1. startsWith(String prefix)
   2. equalsIgnoreCase(String other)
   3. toLowerCase().startsWith(String prefix.toLowerCase())
   4. regionMatches(boolean ignoreCase, int toffset, String other, int ooffset, int len)
   5. contains(String sequence)

2. Question 2

   What is the purpose of using regular expressions for string validation?

   1. To improve the string's readability.
   2. To define a pattern that a string must adhere to.
   3. To encrypt the string for security purposes.
   4. To convert the string to uppercase.
   5. To count the number of words in a string.

3. Question 3

   Which of the following code snippets in Python correctly removes leading and trailing whitespace from a string?

   1. string.remove()
   2. string.strip()
   3. string.trim()
   4. string.replace(' ', '')
   5. string.clean()

4. Question 4

   What potential issue arises when concatenating strings repeatedly within a loop, especially with very long strings in languages like Java?

   1. Integer overflow.
   2. Inefficient memory usage due to string immutability.
   3. Compile-time error.
   4. Stack overflow.
   5. Increased CPU temperature.

5. Question 5

   Which string method is generally used to split a string into a list of substrings based on a specified delimiter?

   1. join()
   2. separate()
   3. split()
   4. divide()
   5. segment()

6. Question 6

   What is the purpose of escaping special characters when using regular expressions?

   1. To make the regex shorter.
   2. To prevent the characters from being interpreted as regex metacharacters.
   3. To improve the regex's performance.
   4. To make the regex easier to read.
   5. To automatically translate the regex into another language.

7. Question 7

   In PHP, which function is used to find the position of the first occurrence of a substring in a string?

   1. strpos()
   2. strstr()
   3. substr()
   4. findstr()
   5. locate()

8. Question 8

   Which validation check is most suitable for verifying that a string represents a valid email address?

   1. Checking the string length.
   2. Using a regular expression designed for email address validation.
   3. Converting the string to lowercase.
   4. Checking if the string contains the '@' symbol.
   5. Checking if the string contains numbers only.

9. Question 9

   Which character encoding is commonly used to support a wide range of characters from different languages?

   1. ASCII
   2. UTF-8
   3. ISO-8859-1
   4. Base64
   5. Binary

10. Question 10

    What is the purpose of string interpolation?

    1. To compress a string to reduce storage space
    2. To convert a string to an integer
    3. To substitute variables' values into a string
    4. To encrypt a string for security
    5. To reverse the order of characters in a string