INTRODUCTION TO JAVA PROGRAMMING AND
DATA STRUCTURES 2026 ACTUAL TEST PAPER
QUESTIONS SOLUTIONS VERIFIED COMPLETE
STUDY PACKAGE
◉ True/False: A Java int can hold a decimal value.
Answer: False (Use double or float for decimals).
◉ What is the result of System.out.println()
Answer: ? ; 3 (Integer division truncates decimals).
◉ In JUnit, which annotation is used for code that should run before
every test?
Answer: @BeforeEach
◉ What is the default value of an uninitialized boolean field in a
class?
Answer: false
◉ How do you find the length of an array named arr?
Answer: arr.length
,◉ What is the difference between == and .equals() for Strings?
Answer: == checks if they are the same object in memory; .equals()
checks if the characters inside are the same.
◉ Which class is used to read user input from the console?
Answer: java.util.Scanner
◉ True/False: A Java class can exist without a package declaration.
Answer: True (it goes into the "default package").
◉ What keyword is used to call a constructor from another
constructor in the same class?
Answer: this()
◉ How do you convert a String "123" to an integer?
Answer: Integer.parseInt("123")
◉ What does the ++i operator do?
Answer: Increments the value of i by 1 and then returns the new
value.
, ◉ Which loop is guaranteed to run at least once?
Answer: do-while loop.
◉ What happens if you try to access an array index that is out of
bounds?
Answer: Java throws an ArrayIndexOutOfBoundsException.
◉ What is the scope of a variable declared inside a for loop?
Answer: It is only accessible within that specific loop.
◉ Can a private field be accessed by a subclass in a different
package?
Answer: No. private is only accessible within the class it is defined
in.
◉ What is the purpose of the this keyword?
Answer: It refers to the current instance of the object.
◉ Define "Method Overloading."
Answer: Multiple methods with the same name but different
parameters (number or type).
◉ Define "Method Overriding."
DATA STRUCTURES 2026 ACTUAL TEST PAPER
QUESTIONS SOLUTIONS VERIFIED COMPLETE
STUDY PACKAGE
◉ True/False: A Java int can hold a decimal value.
Answer: False (Use double or float for decimals).
◉ What is the result of System.out.println()
Answer: ? ; 3 (Integer division truncates decimals).
◉ In JUnit, which annotation is used for code that should run before
every test?
Answer: @BeforeEach
◉ What is the default value of an uninitialized boolean field in a
class?
Answer: false
◉ How do you find the length of an array named arr?
Answer: arr.length
,◉ What is the difference between == and .equals() for Strings?
Answer: == checks if they are the same object in memory; .equals()
checks if the characters inside are the same.
◉ Which class is used to read user input from the console?
Answer: java.util.Scanner
◉ True/False: A Java class can exist without a package declaration.
Answer: True (it goes into the "default package").
◉ What keyword is used to call a constructor from another
constructor in the same class?
Answer: this()
◉ How do you convert a String "123" to an integer?
Answer: Integer.parseInt("123")
◉ What does the ++i operator do?
Answer: Increments the value of i by 1 and then returns the new
value.
, ◉ Which loop is guaranteed to run at least once?
Answer: do-while loop.
◉ What happens if you try to access an array index that is out of
bounds?
Answer: Java throws an ArrayIndexOutOfBoundsException.
◉ What is the scope of a variable declared inside a for loop?
Answer: It is only accessible within that specific loop.
◉ Can a private field be accessed by a subclass in a different
package?
Answer: No. private is only accessible within the class it is defined
in.
◉ What is the purpose of the this keyword?
Answer: It refers to the current instance of the object.
◉ Define "Method Overloading."
Answer: Multiple methods with the same name but different
parameters (number or type).
◉ Define "Method Overriding."
