51 JavaScript MCQ Questions in english

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51 JavaScript MCQ Questions in english हिन्दी

23. The primary entry point for all client-side JavaScript features and APIs is which of the following objects?

A. Position

B. Window

C. Standard

D. Location

22. 14. What does Java's truncation mean?

A. Floating-point value assigned to a Floating type

B. Floating-point value assigned to an integer type

C. Integer value assigned to floating type

D. Integer value assigned to floating type

21. Where can I get HTML documents with client-side JavaScript code embedded?

A. A URL that uses the special javascript:code

B. A URL that uses the special javascript:protocol

C. A URL that uses the special javascript:encoding

D. A URL that uses the special javascript:stack

20. 13. In Java programming, which of the following is a form of polymorphism?

A. Multiple polymorphism

B. Compile time polymorphism

C. Multilevel polymorphism

D. Execution time polymorphism

19. Which of the following are not data types for java script?

A. Null type

B. Undefined type

C. Number type

D. All of the mentioned

18. 12. Which of the following lines of Java code has an error?

A. b cannot contain value 50

B. b cannot contain value 100, limited by its range

C. No error in this code

D. * operator has converted b * 50 into int, which can not be converted to byte without casting

17. 11. What will the following Java programme produce?

A. Compilation error

B. Runtime error

C. 5 6 5 6

D. 5 6 5

16. Which of the following statements in JavaScript defines arrays?

A. It is an ordered list of values

B. It is an ordered list of objects

C. It is an ordered list of string

D. It is an ordered list of functions

15. 10. What does Java's "this" keyword not do?

A. Referring to the instance variable when a local variable has the same name

B. Passing itself to the method of the same class

C. Passing itself to another method

D. Calling another constructor in constructor chaining

14. What would the following JavaScript code produce?

A. 10

B. 50

C. 5

D. Error

The *= operator in javascript is a shorthand expression for the multiplication of a particular number. It is a combination of two operators * and = .

13. 9. Which one of the following Java OOPS concepts is not one?

A. Polymorphism

B. Inheritance

C. Compilation

D. Encapsulation

12. 8. What will the following Java programme produce?

A. NaN

B. Infinity

C. 0.0

D. all of the mentioned

11. What will the following JavaScript code snippet produce?

A. error

B. Sanfoundry_ Javascriptmcq

C. undefined

D. Sanfoundry_Javascriptmcq

10. 7. The java path is set via which environment variable?

A. MAVEN_Path

B. JavaPATH

C. JAVA

D. JAVA_HOME

9. Which of the following statements describes JavaScript closures?

A. JavaScript is a function that is enclosed with references to its inner function scope

B. JavaScript is a function that is enclosed with references to its lexical environment

C. JavaScript is a function that is enclosed with the object to its inner function scope

D. None of the mentioned

8. 6. What is the java code file extension?

A. .js

B. .txt

C. .class

D. .java

7. Which of the following statements regarding JavaScript is true?

A. JavaScript is an Object-Based language

B. JavaScript is Assembly-language

C. JavaScript is an Object-Oriented language

D. JavaScript is a High-level language

6. 5. Which of the following cannot be used as the name of a variable in Java?

A. identifier & keyword

B. identifier

C. keyword

D. none of the mentioned

5. JavaScript: What is it?

A. JavaScript is a scripting language used to make the website interactive

B. JavaScript is an assembly language used to make the website interactive

C. JavaScript is a compiled language used to make the website interactive

D. None of the mentioned

JavaScript is a scripting language used along with HTML and CSS to make the website interactive along. It is used both on the client-side and server-side.

4. 4. Which of the following is not an attribute of Java?

A. Object-oriented

B. Use of pointers

C. Portable

D. Dynamic and Extensible

3. 3. What software is employed in the compilation, testing, and execution of Java programmes?

A. JRE

B. JIT

C. JDK

D. JVM

2. 2. Regarding Java, which assertion is accurate?

A. Java is a sequence-dependent programming language

B. Java is a code dependent programming language

C. Java is a platform-dependent programming language

D. Java is a platform-independent programming language

1. 1. Who made Java programming possible?

A. Guido van Rossum

B. James Gosling

C. Dennis Ritchie

D. Bjarne Stroustrup

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