Page 444 - CA_Blue( J )_Class10
P. 444
appropriate option given below:
a. Both A and R are true, and R is the correct explanation of A.
b. Both A and R are true, but R is not the correct explanation of A.
c. A is true, but R is false.
d. A is false, but R is true.
1. Assertion (A): The charAt() method is used to extract a character at a specific index from a string.
Reason (R): The charAt() method returns the ASCII value of the character at the specified index.
2. Assertion (A): The trim() method in Java removes whitespace from both ends of a string.
Reason (R): The trim() method modifies the original string to remove leading and trailing whitespace characters.
3. Assertion (A): The startsWith() method can be used to verify if a string starts with a specific sequence of characters.
Reason (R): The startsWith() method returns true if the beginning of the string matches the specified prefix.
21 st
E. Case-based questions. Century #Experiential Learning
Skills
In Java, a String array is a data structure that holds a fixed number of String values. Arrays are used to store multiple values in a
single variable, instead of declaring separate variables for each value. Here's an overview of String arrays in Java:
You can declare a String array in the following ways:
String[] array1; OR String array2[];
You can initialize a String array
a. Static Initialization:
String[] array = {"Hello", "World", "Java"};
b. Dynamic Initialization:
String[] array = new String[3]; // Array with 3 elements, all initialized to null
array[0] = "Hello";
array[1] = "World";
array[2] = "Java";
1. What is a String array in Java?
a. A data structure that holds a fixed number of integer values.
b. A data structure that holds a fixed number of boolean values.
c. A data structure that holds a fixed number of String values.
d. A data structure that holds a variable number of String values.
2. How can you declare a String array in Java?
a. String array1[]; b. String[] array2;
c. Both a and b d. None of these
3. Which of the following is an example of static initialization of a String array?
a. String[] array = {"Hello", "World", "Java"};
b. String[] array = new String[3];
c. String[] array = new String[];
d. String[] array = new String[3]{"Hello", "World", "Java"};
4. What are the different ways to initialize the String Array?
a. Static initialization b. Dynamic initialization
c. Both a and b d. None of these
5. What is a size of the array[]:
a. 0 b. 1
c. 14 d. 3
442442 Touchpad Computer Applications-X

