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Java MCQ: What is the default value of a char in Java? a) 0 b) ‘\0’ c) ‘ ‘ d) null Answer: b) ‘\0’ Explanation: The default value of a char in Java is the null character '\0'. The char data type is a 16-bit Unicode character, which allows it to represent any character in […]

Java MCQ: Which data type would be most suitable for storing the price of an item in a store? a) int b) double c) boolean d) char Answer: b) double Explanation: The double data type in Java is the most suitable for storing the price of an item in a store because it can handle

Java MCQ: Which of the following is not a primitive data type in Java? a) float b) void c) char d) short Answer: b) void Explanation: In Java, void is not a primitive data type; it is a keyword used to specify that a method does not return a value. Primitive data types in Java

Java MCQ: Which data type value can an int variable not store? a) -32768 b) 100000 c) 2147483648 d) -2147483648 Answer: c) 2147483648 Explanation: In Java, the int data type is a 32-bit signed integer, which means it can store values ranging from -231 (-2,147,483,648) to 231-1 (2,147,483,647). These boundaries are determined by the binary

Java MCQ: Which of the following can be a valid value for a char data type? a) “A” b) ‘A’ c) 65 d) Both b and c Answer: d) Both b and c Explanation: In Java, the char data type is used to store a single 16-bit Unicode character. A char can represent any character

Java MCQ: What is the size of a double data type in Java? a) 4 bytes b) 2 bytes c) 8 bytes d) 16 bytes Answer: c) 8 bytes Explanation: In Java, the double data type is a primitive data type used for storing double-precision 64-bit IEEE 754 floating-point numbers. The size of a double

Java MCQ: What is the default value of a boolean in Java? a) 0 b) false c) null d) undefined Answer: b) false Explanation: In Java, the default value of a boolean data type is false. The boolean type is one of the eight primitive data types in Java, specifically used for storing simple true/false

Java MCQ: Which of the following is a primitive data type in Java? a) String b) int c) Array d) Object Answer: b) int Explanation: In Java, int is one of the eight primitive data types, which are the most basic data types available in the language. Primitive types in Java are predefined by the

Java MCQ: Which loop construct guarantees that the loop body is executed at least once? a) for loop b) while loop c) do-while loop d) continue statement Answer: c) do-while loop Explanation: The do-while loop in Java guarantees that the loop body is executed at least once, regardless of the condition. This is because the

Java MCQ: What is the key difference between a while loop and a do-while loop in Java? a) The syntax used to define the loop b) The number of iterations performed c) The condition check timing d) The ability to use the break statement Answer: c) The condition check timing Explanation: The key difference between

Java MCQ: Which loop construct in Java is best suited when the number of iterations is unknown? a) for loop b) while loop c) do-while loop d) none Answer: b) while loop Explanation: The while loop in Java is best suited for scenarios where the number of iterations is unknown or depends on a certain

Java MCQ: What is the purpose of the continue statement in a loop? a) To exit the loop immediately b) To skip the current iteration and move to the next iteration c) To terminate the program d) To execute a specific block of code Answer: b) To skip the current iteration and move to the

Java MCQ: Which loop construct in Java is best suited when the number of iterations is known? a) for loop b) while loop c) do-while loop d) break statement Answer: a) for loop Explanation: The for loop in Java is best suited when the number of iterations is known beforehand. This loop is ideal for

Java MCQ: Which method is used to assert that a condition is true in JUnit? a) assertTrue() b) assertCondition() c) assertMatch() d) assertEquals() Answer: a) assertTrue() Explanation: The assertTrue() method is used in JUnit to assert that a condition is true. If the condition is true, the test passes; if it is false, the test

Java MCQ: Which annotation is used to run a method once after all tests in JUnit 5? a) @AfterTest b) @AfterClass c) @AfterAll d) @CleanupAll Answer: c) @AfterAll Explanation: The @AfterAll annotation in JUnit 5 is used to run a method once after all tests in the test class. This is useful for performing cleanup

Java MCQ: Which annotation is used to run a method once before all tests in JUnit 5? a) @BeforeTest b) @BeforeClass c) @BeforeAll d) @SetupAll Answer: c) @BeforeAll Explanation: The @BeforeAll annotation in JUnit 5 is used to run a method once before all tests in the test class. This is useful for performing time-consuming

Java MCQ: Which annotation is used to run a method after each test in JUnit 5? a) @AfterTest b) @After c) @AfterEach d) @Cleanup Answer: c) @AfterEach Explanation: The @AfterEach annotation in JUnit 5 is used to run a method after each test method in the test class. This is useful for cleaning up resources,

Java MCQ: Which annotation is used to run a method before each test in JUnit 5? a) @BeforeTest b) @Before c) @BeforeEach d) @Setup Answer: c) @BeforeEach Explanation: The @BeforeEach annotation in JUnit 5 is used to run a method before each test method in the test class. This is useful for setting up common

Java MCQ: Which assertion is used to check that two values are equal in JUnit? a) assertSame() b) assertEqual() c) assertEquals() d) assertMatch() Answer: c) assertEquals() Explanation: The assertEquals() assertion is used in JUnit to check that two values are equal. This assertion compares the expected value with the actual value and passes the test

Java MCQ: Which annotation is used to indicate a method is a test method in JUnit 5? a) @TestMethod b) @Test c) @RunTest d) @JUnitTest Answer: b) @Test Explanation: The @Test annotation is used in JUnit 5 to indicate that a method is a test method. When a method is annotated with @Test, JUnit will

Java MCQ: What is JUnit primarily used for in Java? a) Building graphical user interfaces b) Managing databases c) Unit testing d) Handling network communications Answer: c) Unit testing Explanation: JUnit is a widely-used testing framework in Java that is primarily designed for writing and running unit tests. Unit testing involves testing individual components or

Java MCQ: Which method is used to handle POST requests in a Servlet? a) doPost() b) doGet() c) service() d) init() Answer: a) doPost() Explanation: The doPost() method is used to handle POST requests in a Servlet. When a client sends a POST request, typically from an HTML form submission, the doPost() method of the

Java MCQ: Which method is used to handle GET requests in a Servlet? a) doPost() b) doGet() c) service() d) init() Answer: b) doGet() Explanation: The doGet() method is used to handle GET requests in a Servlet. When a client sends a GET request to a web server, the doGet() method of the associated Servlet

Java MCQ: What is a Servlet in Java? a) A Java class that handles HTTP requests b) A JSP file c) A JavaScript function d) A database query Answer: a) A Java class that handles HTTP requests Explanation: A Servlet is a Java class that handles HTTP requests and responses in a web application. Servlets

Java MCQ: What is the purpose of the <jsp:include> tag in JSP? a) To declare a variable b) To include another JSP file at runtime c) To create a comment d) To forward a request to another resource Answer: b) To include another JSP file at runtime Explanation: The <jsp:include> tag in JSP is used