jscript-test-jan2025 0% 15 jscript-test-jan2025 1 / 29 1. What will be the output of the following JavaScript code? var o = new F(); o.constructor === F A. 1 B. 1 2 / 29 2. The behaviour of the instances present of a class inside a method is defined by __________ A. Method B. Classes C. Interfaces D. Classes and Interfaces 3 / 29 3. The unordered collection of properties, each of which has a name and a value is called _________ A. String B. Object C. Serialized Object D. Array 4 / 29 4. Among the keywords below, which one is not a statement? A. debugger B. with C. if D. use strict 5 / 29 5. Consider the following JavaScript statement containing regular expressions and check if the pattern matches? var text = "testing: 1, 2, 3"; var pattern = /d+/g; A. text==pattern B. text.equals(pattern) C. text.test(pattern) D. pattern.test(text) 6 / 29 6. What is a block statement in JavaScript? A. conditional block B. block that contains a single statement C. both conditional block and a single statement D. block that combines multiple statements into a single compound statement 7 / 29 7. What is the command used for debugging output in Node? A. print(); B. console.log(…); C. debug(…); D. execute(…); 8 / 29 8. What will be the output of the following JavaScript code? var grade='A'; var result=0; switch(grade) { case 'A': result+=10; case 'B': result+=9; case 'C': result+=8; default: result+=0; } document.write(result); A. 10 B. 27 C. 8 9 / 29 9. A function definition expression can be called as __________ A. Function prototype B. Function literal C. Function calling D. Function declaration 10 / 29 10. The keyword or the property that you use to refer to an object through which they were invoked is _________ A. from B. to C. this D. object 11 / 29 11. What are the three important manipulations done in a for loop on a loop variable? A. Updation, Incrementation, Initialization B. Initialization,Testing, Updation C. Testing, Updation, Testing D. Initialization,Testing, Incrementation 12 / 29 12. The object has three object attributes namely ________ A. Class, parameters, object’s extensible flag B. Prototype, class, objects’ parameters C. Prototype, class, object’s extensible flag D. Native object, Classes and Interfaces and Object’s extensible flag 13 / 29 13. The pop() method of the array does which of the following task? A. decrements the total length by 1 B. increments the total length by 1 C. prints the first element but no effect on the length D. updates the element 14 / 29 14. A conditional expression is also called a _______________ A. Alternative to if-else B. Immediate if C. If-then-else statement D. Switch statement 15 / 29 15. The snippet that has to be used to check if “a” is not equal to “null” is _________ A. if(a!=null) B. if (!a) C. if(a!null) D. if(a!==null) 16 / 29 16. Why does the Node rely on event handlers? A. APIs are synchronous B. APIs are asynchronous C. APIs are reusable D. APIs are modular 17 / 29 17. What is the code to print hello one second from now? A. setTimeout(function() { console.log(“Hello World”); }, 1000); B. setTimeout(function() { 1000, console.log(“Hello World”); }); C. setTimeout(function(1000) { console.log(“Hello World”); }); D. setTimeout(function() { console.log(“Hello World”); }); 18 / 29 18. JavaScript is a _______________ language. A. Object-Oriented B. High-level C. Assembly-language D. Object-Based 19 / 29 19. What will be the role of the continue keyword in the following JavaScript code snippet? while (a != 0) { if (a == 1) continue; else a++; } A. The continue keyword restarts the loop B. The continue keyword skips the next iteration C. The continue keyword skips the rest of the statements in that iteration D. The continue keyword breaks out of the loop 20 / 29 20. The meaning for Augmenting classes is that ___________ A. objects inherit prototype properties even in a dynamic state B. objects inherit prototype properties only in a dynamic state C. objects inherit prototype properties in the static state D. object doesn’t inherit prototype properties in the static state 21 / 29 21. What is the command to run the node programs? A. node(program.js) B. program.js C. node program.js D. node.program.js 22 / 29 22. Among the following, which one is a ternary operator? A. + B. : C. ?: D. - 23 / 29 23. What will be the output of the following JavaScript code? var string2Num=parseInt("123xyz"); A. 123 B. 123xyz C. Exception D. NaN 24 / 29 24. The method that can be used to create new properties and also to modify the attributes of existing properties is _________ A. Object.defineProperty() B. Object.defineProperties() C. Both Object.defineProperty() and Object.defineProperties() D. Object.inherit() 25 / 29 25. The method that performs the search-and-replace operation to strings for pattern matching is _______ A. searchandreplace() B. add() C. edit() D. replace() 26 / 29 26. What will be the output of the following JavaScript code? const object1 = {}; Object.defineProperties(object1, { property1: { value: 10 } }); console.log(object1.property1); A. 10 B. undefined C. error 27 / 29 27. The basic purpose of the toLocaleString() is to _________ A. return a parsed string B. return a local time in the string format C. return a localized string representation of the object D. return a localised object representation 28 / 29 28. Will the following JavaScript code work? var tensquared = (function(x) {return x*x;}(10)); A. Yes, perfectly B. Error C. Exception will be thrown D. Memory leak 29 / 29 29. What will be the output of the following JavaScript code? let size = 5; let a = 5; for (let j = size; j >= 0; j=a) { document.write(a); a = a - 2; } A. 5555 B. 5321 C. 531 D. 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