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Java String MCQ Questions with Answers
Practice Java String MCQ questions with answers and improve your understanding of one of the most important topics in Java programming. This Java String quiz is useful for beginners, college students, software developers, and job seekers preparing for interviews and certification exams.
The quiz covers important Java String concepts including String objects, String literals, immutability, String methods, StringBuffer, StringBuilder, memory allocation, and common interview questions. Attempt the MCQ test below to evaluate your Java programming skills and identify areas for improvement.
What is a String in Java?
A String in Java is a sequence of characters used to store and manipulate text data. The String class is one of the most frequently used classes in Java and belongs to the java.lang package. Since strings are used in almost every Java application, understanding how they work is essential for both beginners and experienced developers.
Java Strings are immutable, which means their values cannot be changed once they are created. Whenever a string is modified, Java creates a new String object instead of changing the existing one. This feature improves security, reliability, and performance in many situations.
Knowledge of Java Strings is important for coding interviews because interviewers frequently ask questions related to string manipulation, memory management, String pooling, and the differences between String, StringBuffer, and StringBuilder.
Important Java String Concepts for Interviews
- String Objects and String Literals
- String Pool and Memory Management
- String Immutability
- String Methods and Operations
- String Comparison using equals() and ==
- StringBuffer vs StringBuilder
- String Concatenation Techniques
- Common Java String Interview Questions
Instructions
Topic- Java - String
The test consists of 11 questions.
No negative marking for this test.
No Time limit
The pass percentage is 70%
The correct answer with a description will be displayed after the answer has been marked.
Submit the test to calculate your score once you are done with all the questions.
Complexity Level- Moderate
Select true or false
Select true or false
String str = "my name is robert";
String str2 = str.substring(3, 8);
System.out.println(str2);
What will be the output?
String str4 = "My @name is @John";
String[] str3=str4.split("@", 5);
for(String a: str3) {
System.out.println(a);
}
String str = "my name is Robert";
System.out.println(str.charAt(4));
StringBuffer s = new StringBuffer();
s.append("Hello");
s.append("world");
String str2 = s.toString();
System.out.println(str2);
String str3="Hello";
str3.concat("Robert");
System.out.println(str3);
Why Learn Java String Concepts?
Java String is one of the most important topics in Java programming and is frequently asked in technical interviews, placement tests, certification exams, and coding assessments. Since strings are used to handle text data, developers work with String objects in almost every Java application, from simple programs to enterprise-level software systems.
A strong understanding of Java String concepts helps programmers write efficient and reliable code. Topics such as String immutability, String pooling, String methods, StringBuffer, StringBuilder, and string comparison are essential for solving real-world programming problems and optimizing application performance.
Many interview questions focus on how Strings are stored in memory, the difference between == and equals(), and the behavior of String objects during concatenation and modification. Practicing Java String MCQ questions regularly can help learners strengthen their conceptual knowledge, avoid common mistakes, and improve their confidence in coding interviews.
More Java String MCQs and Practice Tests
Want to practice more questions on Java Strings? Continue with additional Java String MCQ tests and strengthen your understanding of String objects, String methods, String comparison, StringBuffer, StringBuilder, and other important interview topics.