Syit Core Java 2019
.
- 1.JAVA was first called as?
- A.
Banyan
- B.
Oak
- C.
Mahagony
- D.
Sal
- 2.Which component is responsible for converting bytecode into machine specific code?
- A.
JVM
- B.
JDK
- C.
JIT
- D.
JRE
- 3.Which statement is true about java?
- A.
Platform independent programming language
- B.
Platform dependent programming language
- C.
Code dependent programming language
- D.
Sequence dependent programming language
- 4.Which of the below is invalid identifier with the main method?
- A.
Public
- B.
Static
- C.
Private
- D.
Final
- 5.What is the extension of java code files?
- A.
.class
- B.
.java
- C.
.txt
- D.
.js
- 6.Java is Architecture Neutral.
- A.
True
- B.
False
- 7.Decrement operator, −−, decreases the value of variable by what number?
- A.
1
- B.
2
- C.
3
- D.
4
- 8.Which of the following is not OOPS concept in Java?
- A.
Inheritance
- B.
Encapsulation
- C.
Polymorphism
- D.
Compilation
- 9.Which of the following is a method having same name as that of its class?
- A.
Finalize
- B.
Delete
- C.
Class
- D.
Constructor
- 10.What is the return type of Constructors?
- A.
Int
- B.
Float
- C.
Void
- D.
None of the mentioned
- 11.Which function is used to perform some action when the object is to be destroyed?
- A.
Finalize()
- B.
Delete()
- C.
Main()
- D.
None of the mentioned
- 12.What is the output of this program?
- class box
- {
- int width;
- int height;
- int length;
- int volume;
- box()
- {
- width = 5;
- height = 5;
- length = 6;
- }
- void volume()
- {
- volume = width*height*length;
- }
- }
- class constructor_output
- {
- public static void main(String args[])
- {
- box obj = new box();
- obj.volume();
- System.out.println(obj.volume);
- }
- }
- A.
200
- B.
100
- C.
150
- D.
250
- 13.Which operator is used by Java run time implementations to free the memory of an object when it is no longer needed?
- A.
Delete
- B.
Free
- C.
New
- D.
None of the mentioned
- 14.Which of these keywords is used to make a class?
- A.
Class
- B.
Struct
- C.
Int
- D.
None of the mentioned
- 15.Which of these operators is used to allocate memory for an object?
- A.
Malloc
- B.
Alloc
- C.
New
- D.
Give
- 16.What is the output of this program?
- class box
- {
- int width;
- int height;
- int length;
- }
- class mainclass
- {
- public static void main(String args[])
- {
- box obj = new box();
- obj.width = 10;
- obj.height = 2;
- obj.length = 10;
- int y = obj.width * obj.height * obj.length;
- System.out.print(y);
- }
- }
- A.
12
- B.
200
- C.
300
- D.
400
- 17.Which of these access specifiers must be used for main() method?
- A.
Private
- B.
Public
- C.
Protected
- D.
None of the mentioned
- 18.Which of these access specifier must be used for class so that it can be inherited by another subclass?
- A.
Public
- B.
Private
- C.
Protected
- D.
None of the mentioned
- 19.Which method can be defined only once in a program?
- A.
Main method
- B.
Finalize method
- C.
Static method
- D.
Private method
- 20.Using which of the following, multiple inheritance in Java can be implemented?
- A.
Interfaces
- B.
Multithreading
- C.
Protected methods
- D.
Private methods
- 21.What is not type of inheritance?
- A.
Single inheritance
- B.
Double inheritance
- C.
Hierarchical inheritanc
- D.
Multiple inheritance
- 22.Which of the following is used for implementing inheritance through an interface?
- A.
Inherited
- B.
Using
- C.
Extends
- D.
Implements
- 23.What would be the result if a class extends two interfaces and both have a method with same name and signature?
- A.
Runtime error
- B.
Compile time error
- C.
Code runs successfully
- D.
First called method is executed successfully
- 24.Which of these keywords are used to define an abstract class?
- A.
Abst
- B.
Abstract
- C.
Abstrat
- D.
Static class
- 25.Which of the following loops will execute the body of loop even when condition controlling the loop is initially false?
- A.
Do-while
- B.
While
- C.
For
- D.
None of the mentioned
Questions: 40 | Attempts: 61 | Last updated: Mar 21, 2022
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Sample Question¿Qué clase Colletion garantiza que no existan duplicados?
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