Java Library

What is the use of the @DataProvider annotation in TestNG? A) To provide data to a test method B) To provide setup information for a test suite C) To clean up resources after a test D) To specify the order of test execution Answer: A) To provide data to a test method Explanation: The @DataProvider […]

Which annotation is used to run a method after each test method in TestNG? A) @AfterMethod B) @AfterClass C) @AfterTest D) @AfterSuite Answer: A) @AfterMethod Explanation: The @AfterMethod annotation in TestNG is used to run a method after each test method. This annotation is typically used for cleanup tasks, such as resetting states or releasing

What is the purpose of the @BeforeSuite annotation in TestNG? A) To execute a method before all tests in a suite B) To execute a method after all tests in a suite C) To execute a method before each test method D) To execute a method after each test method Answer: A) To execute a

Which annotation is used to define a test method in TestNG? A) @Test B) @TestMethod C) @BeforeTest D) @AfterTest Answer: A) @Test Explanation: The @Test annotation in TestNG is used to define a test method. Any method annotated with @Test will be treated as a test case by the TestNG framework and will be executed

What is TestNG in Java? A) A testing framework inspired by JUnit and NUnit B) A logging framework C) A database management tool D) A build automation tool Answer: A) A testing framework inspired by JUnit and NUnit Explanation: TestNG is a testing framework inspired by JUnit and NUnit. It is designed to make testing

How can you create a pretty-printed JSON output in GSON? A) By using GsonBuilder().setPrettyPrinting() B) By using the @SerializedName annotation C) By overriding the toString() method D) By setting a flag in the JSON Answer: A) By using GsonBuilder().setPrettyPrinting() Explanation: In GSON, you can create a pretty-printed JSON output by using the GsonBuilder().setPrettyPrinting() method. This

How do you handle polymorphic types in GSON? A) By using the @JsonAdapter annotation B) By using the @SerializedName annotation C) By using the @Expose annotation D) By using the @JsonInclude annotation Answer: A) By using the @JsonAdapter annotation Explanation: In GSON, you can handle polymorphic types by using the @JsonAdapter annotation in combination with

What is the role of the JsonObject class in GSON? A) To represent a JSON object in a tree structure B) To serialize Java objects to JSON C) To handle HTTP requests D) To manage database connections Answer: A) To represent a JSON object in a tree structure Explanation: The JsonObject class in GSON is

How do you create a custom serializer in GSON? A) By implementing the JsonSerializer interface B) By overriding the toString() method C) By using the @SerializedName annotation D) By setting a flag in the GsonBuilder Answer: A) By implementing the JsonSerializer interface Explanation: In GSON, you can create a custom serializer by implementing the JsonSerializer

What does the JsonElement class represent in GSON? A) A generic JSON element that could be a JSON object, array, or value B) A JSON object C) A JSON array D) A JSON primitive value Answer: A) A generic JSON element that could be a JSON object, array, or value Explanation: The JsonElement class in

How do you handle null values during serialization with GSON? A) By using GsonBuilder().serializeNulls() B) By using the @Expose annotation C) By overriding the equals() method D) By setting a flag in the JSON Answer: A) By using GsonBuilder().serializeNulls() Explanation: In GSON, you can handle null values during serialization by using the GsonBuilder().serializeNulls() method. This

What is the purpose of the @SerializedName annotation in GSON? A) To specify the JSON property name for a field B) To ignore a field during serialization C) To handle exceptions during JSON processing D) To include only non-null fields in the JSON output Answer: A) To specify the JSON property name for a field

How do you exclude fields from serialization in GSON? A) By using the @Expose annotation B) By using the @SerializedName annotation C) By overriding the toString() method D) By setting a flag in the JSON Answer: A) By using the @Expose annotation Explanation: In GSON, you can exclude fields from serialization by using the @Expose

Which class in GSON is primarily used for JSON serialization and deserialization? A) Gson B) JsonObject C) JsonParser D) JsonElement Answer: A) Gson Explanation: The Gson class is the core class in the GSON library that is primarily used for JSON serialization and deserialization. It provides methods for converting Java objects to JSON strings and

What is GSON used for in Java? A) For converting Java objects to JSON and vice versa B) For handling XML data C) For managing database connections D) For building user interfaces Answer: A) For converting Java objects to JSON and vice versa Explanation: GSON is a popular Java library developed by Google that is

What is the purpose of the JsonFactory class in Jackson? A) To create parsers and generators for processing JSON B) To manage database connections C) To handle polymorphic types D) To format JSON strings Answer: A) To create parsers and generators for processing JSON Explanation: The JsonFactory class in Jackson is used to create parsers

How can you handle date formatting in Jackson? A) By using the @JsonFormat annotation B) By using the @JsonProperty annotation C) By using the @JsonIgnore annotation D) By setting a flag in the JSON Answer: A) By using the @JsonFormat annotation Explanation: In Jackson, you can handle date formatting by using the @JsonFormat annotation. This

How do you configure Jackson to only include non-null fields in the JSON output? A) By using the @JsonInclude annotation B) By using the @JsonIgnore annotation C) By setting a flag in the JSON D) By overriding the equals() method Answer: A) By using the @JsonInclude annotation Explanation: In Jackson, you can configure serialization to

What is the role of the JsonNode class in Jackson? A) To represent a node in a JSON tree structure B) To serialize Java objects to JSON C) To manage HTTP connections D) To format dates in JSON Answer: A) To represent a node in a JSON tree structure Explanation: The JsonNode class in Jackson

How do you handle polymorphic types in Jackson? A) By using the @JsonTypeInfo annotation B) By using the @JsonSubTypes annotation C) By using the @JsonProperty annotation D) By using the @JsonIgnoreProperties annotation Answer: A) By using the @JsonTypeInfo annotation Explanation: In Jackson, you can handle polymorphic types (where an object can be of multiple types)

What is the function of the @JsonIgnore annotation in Jackson? A) To exclude a field from serialization and deserialization B) To rename a field in the JSON output C) To define a default value for a field D) To include only non-null fields in the JSON output Answer: A) To exclude a field from serialization

How can you customize the serialization of a field in Jackson? A) By using a custom serializer with the @JsonSerialize annotation B) By overriding the equals() method C) By using the @JsonIgnore annotation D) By setting a flag in the JSON file Answer: A) By using a custom serializer with the @JsonSerialize annotation Explanation: In

What is the purpose of the @JsonProperty annotation in Jackson? A) To specify the JSON property name for a field B) To ignore a field during serialization C) To define the type of a JSON object D) To handle exceptions during JSON processing Answer: A) To specify the JSON property name for a field Explanation:

How do you ignore unknown properties during deserialization with Jackson? A) By using the @JsonIgnoreProperties annotation B) By setting a flag in the JSON C) By using the @JsonProperty annotation D) By overriding the toString() method Answer: A) By using the @JsonIgnoreProperties annotation Explanation: In Jackson, you can ignore unknown properties during deserialization by using

Which Jackson class is primarily used for converting Java objects to JSON? A) ObjectMapper B) JsonMapper C) JsonNode D) JsonFactory Answer: A) ObjectMapper Explanation: The ObjectMapper class is the core class in Jackson used for converting Java objects to JSON and vice versa. It provides methods for serializing Java objects into JSON strings and deserializing