- AInheritance
- BPolymorphism
- CEncapsulation
- DAbstraction
ICSE Computer Application - Class X - Selection Examination - 2024-25 - MCQ - CALCUTTA PUBLIC SCHOOL - Quiz
- AFor
- Bdo...while
- Cwhile
- Dswitch
- ACall by reference
- BCall by value
- CCall by argument
- DCall by method
- A1. LONGUOGE 2. -32
- BL0NGU0GE 2. -32
- C1. Languoge 2. 32
- D1. LANGUOGE 2. 30
- ACHARAT()
- Bcharat()
- CcharAt()
- DCharAt()
- ABoth Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
- BBoth Assertion (A) and Reason (R) are true, and Reason (R) is not the correct explanation of Assertion (A).
- CAssertion (A) is true, and Reason (R) is false.
- DAssertion (A) is false, and Reason (R) is true.
- AReducing code duplication and promoting code reusability.
- BHiding implementation details.
- CMaking all members private.
- DEnabling polymorphism.
Results:
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🟢 Correct Answers: 🔴 Wrong Answers:
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Quiz Analytics
ICSE Computer Application - Class X - Selection Examination - 2024-25 - MCQ - CALCUTTA PUBLIC SCHOOL - Quiz
Guest User
Time Taken: Questions: Answered: Not Answered:
Correct Answer:
Wrong Answer:
Percentage: %
- A. Inheritance
- B. Polymorphism
- C. Encapsulation
- D. Abstraction
Remarks:
Explanation:
- A. For
- B. do...while
- C. while
- D. switch
Remarks:
Explanation:
- A. 26
- B. 74
- C. 100.0
- D. 2674
Remarks:
Explanation:
Explanation:
Double.parseDouble()converts the string values"26.0"and"74.0"intodoublevalues.- Adding
26.0and74.0results in100.0.
- A. 101
- B. 202
- C. 303
- D. 404
Remarks:
Explanation:
Explanation:
arr[-1+2] simplifies to arr[1].
The element at index 1 in the array is 202.
- A. Call by reference
- B. Call by value
- C. Call by argument
- D. Call by method
Remarks:
Explanation:
Explanation:
In Call by Value, the values of the actual parameters are copied to the formal parameters. Any changes made to the formal parameters do not affect the actual parameters.
- A. 1. LONGUOGE 2. -32
- B. L0NGU0GE 2. -32
- C. 1. Languoge 2. 32
- D. 1. LANGUOGE 2. 30
Remarks:
Explanation:
Explanation:
"LANGUAGE".replace('A', '0');
Replaces all occurrences of 'A' with '0' in the string.
Result: "L0NGU0GE".
"PROGRAM".compareTo("Program");
Compares the strings lexicographically.
Java uses ASCII values, and the difference in case ('P' in uppercase vs. 'p' in lowercase) gives -32.
- A. 8
- B. 6
- C. 5
- D. 7
Remarks:
Explanation:
Explanation:
words[0] = "Java" → words[0].length() = 4.
words[2] = "fun" → words[2].length() = 3.
Total:
4
+
3
=
7
4+3=7.
- A. CHARAT()
- B. charat()
- C. charAt()
- D. CharAt()
Remarks:
Explanation:
Explanation:
The charAt(int index) method in the String class is used to extract a character at a specific position (index) in the string.
Java is case-sensitive, so the correct method name is charAt().
- A. Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
- B. Both Assertion (A) and Reason (R) are true, and Reason (R) is not the correct explanation of Assertion (A).
- C. Assertion (A) is true, and Reason (R) is false.
- D. Assertion (A) is false, and Reason (R) is true.
Remarks:
Explanation:
Assertion (A): True. Constructors are invoked automatically when an object is created to initialize the object.
Reason (R): False. Constructors are specifically designed to initialize the instance variables of a class.
- A. Reducing code duplication and promoting code reusability.
- B. Hiding implementation details.
- C. Making all members private.
- D. Enabling polymorphism.
Remarks:
Explanation:
Explanation:
Inheritance allows a child class to acquire properties and methods from a parent class, eliminating the need to duplicate code. This promotes code reusability and simplifies maintenance.