Strings -Java Programming MCQ Questions and Answers

1.
In Java, which class is used to represent a sequence of characters as a string?

A. String

B. StringBuilder

C. StringSequence

D. StringArray

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2.
What is the correct way to create a new empty String object in Java?

A. String emptyString = "";

B. String emptyString = new String();

C. String emptyString = " ";

D. String emptyString = null;

E. Both A and B

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3.
In Java, which operator is used to concatenate two strings?

A. +

B. &

C. ,

D. |

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4.
Which of the following methods is used to compare two strings for equality in Java?

A. equals()

B. compareTo()

C. equalsIgnoreCase()

D. compare()

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5.
What does the length() method of a String object in Java return?

A. The capacity of the string

B. The size of the string

C. The length of the string

D. The index of the last character

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6.
Which of the following is true about Java strings?

A. Strings are mutable.

B. Strings can contain only letters.

C. Strings can have a null value.

D. Strings are implemented as arrays of characters.

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7.
How do you convert a string to lowercase in Java?

A. str.toLower()

B. str.toLowerCase()

C. str.convertToLower()

D. str.makeLowerCase()

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8.
What is the purpose of the charAt() method of a String object in Java?

A. To add a character to the string

B. To remove a character from the string

C. To get the character at a specific index

D. To get the length of the string

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9.
Which method is used to find the index of the first occurrence of a specified character in a string in Java?

A. findIndex()

B. indexOf()

C. search()

D. findCharacter()

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10.
In Java, what is the result of the expression "Hello".substring(1, 4)?

A. "Hel"

B. "H"

C. "ell"

D. "llo"

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Strings -Java Programming MCQ Questions and Answers

1. In Java, which class is used to represent a sequence of characters as a string?

Answer & Solution

2. What is the correct way to create a new empty String object in Java?

Answer & Solution

3. In Java, which operator is used to concatenate two strings?

Answer & Solution

4. Which of the following methods is used to compare two strings for equality in Java?

Answer & Solution

5. What does the length() method of a String object in Java return?

Answer & Solution

6. Which of the following is true about Java strings?

Answer & Solution

7. How do you convert a string to lowercase in Java?

Answer & Solution

8. What is the purpose of the charAt() method of a String object in Java?

Answer & Solution

9. Which method is used to find the index of the first occurrence of a specified character in a string in Java?

Answer & Solution

10. In Java, what is the result of the expression "Hello".substring(1, 4)?

Answer & Solution

Read More Section(Strings)

1.
In Java, which class is used to represent a sequence of characters as a string?

2.
What is the correct way to create a new empty String object in Java?

3.
In Java, which operator is used to concatenate two strings?

4.
Which of the following methods is used to compare two strings for equality in Java?

5.
What does the length() method of a String object in Java return?

6.
Which of the following is true about Java strings?

7.
How do you convert a string to lowercase in Java?

8.
What is the purpose of the charAt() method of a String object in Java?

9.
Which method is used to find the index of the first occurrence of a specified character in a string in Java?

10.
In Java, what is the result of the expression "Hello".substring(1, 4)?