Data Structures and Algorithms Quiz

Which of the following statements is true about linear and non-linear data structures in java?

• Array and LinkedList are non-linear data structures, while Graph and Tree are linear data structures.

• Array and LinkedList are linear data structures, while Graph and Tree are non-linear data structures.

• Array and Graph are linear data structures, while LinkedList and Tree are non-linear data structures.

• Array and Tree are linear data structures, while LinkedList and Graph are non-linear data structures.

Which symbol is used to denote a generic type in Java?

• *

• &

• #

• <>

Consider the following generic method in Java: Which of the following statements is true about this method?

• This method can only print arrays of Strings.

• This method can print arrays of any object type, but not primitive types.

• This method can print arrays of any type, including primitive types.

• This method will cause a compile-time error.

Consider the following Java method: Which of the following calls to this method are valid?

• printVarargs("Hello", "World");

• printVarargs({"Hello", "World"});

• printVarargs(new String[]{"Hello", "World"});

• printVarargs(new String[]{"Hello"}, "World");

Which of the following statements about variable-length arguments (varargs) is true?

• A method can have multiple varargs parameters.

• Varargs parameters must be the first parameter in a method's parameter list.

• Varargs parameters can only accept an array of arguments.

• A method can have only one varargs parameter, and it must be the last parameter in the method's parameter list.

Consider the following Java code snippet: Which of the following statements is true about the given code?

• The code will produce a compilation error because generic classes cannot be instantiated with primitive types.

• The code will produce a runtime error when calling getContent on integerBox because of type mismatch.

• The code will output 123 and Hello.

• The code will produce a compilation error because the same generic class cannot be used with different types.

Which of the following is true?

• A generic class may be established with several type parameters.

• Primitive data types can be utilized as parameter types.

• It is possible to instantiate an array with an element type that is a type parameter.

• All of the above

Which of the following code snippets correctly demonstrates method overloading in Java?

• public class Calculator { public int add(int a, int b) { return a + b; } }

• public class Calculator { public int add(int a, int b) { return a + b; } public int add(int a, int b, int c) { return a + b + c; } }

• public class Calculator { public int add(int a, int b) { return a + b; } public String add(String a, String b) { return a + b; } }

• public class Calculator { public int add(int a, int b) { return a + b; } public int add(int a, int b) { return a + b + 10; } }

Which of these is a wildcard symbol?

• ?

• !

• &

• %

Which of the following keywords is used to declare an upper bounded wildcard?

• bound

• extends

• implement

• super