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. A function definition expression can be called as __________ A. Function prototype B. Function literal C. Function calling D. Function declaration 3 / 29 3. 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 4 / 29 4. Among the following, which one is a ternary operator? A. + B. : C. ?: D. - 5 / 29 5. What is the command used for debugging output in Node? A. print(); B. console.log(…); C. debug(…); D. execute(…); 6 / 29 6. 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 7 / 29 7. What will be the output of the following JavaScript code? var string2Num=parseInt("123xyz"); A. 123 B. 123xyz C. Exception D. NaN 8 / 29 8. 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() 9 / 29 9. The basic purpose of the toLocaleString() is to _________ A. return a localised object representation B. return a parsed string C. return a local time in the string format D. return a localized string representation of the object 10 / 29 10. 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 11 / 29 11. What is the code to print hello one second from now? A. setTimeout(function() { console.log(“Hello World”); }); B. setTimeout(function() { console.log(“Hello World”); }, 1000); C. setTimeout(function() { 1000, console.log(“Hello World”); }); D. setTimeout(function(1000) { console.log(“Hello World”); }); 12 / 29 12. 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 13 / 29 13. 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) 14 / 29 14. Among the keywords below, which one is not a statement? A. debugger B. with C. if D. use strict 15 / 29 15. 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 16 / 29 16. A conditional expression is also called a _______________ A. Alternative to if-else B. Immediate if C. If-then-else statement D. Switch statement 17 / 29 17. 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 18 / 29 18. The method that performs the search-and-replace operation to strings for pattern matching is _______ A. searchandreplace() B. add() C. edit() D. replace() 19 / 29 19. 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 20 / 29 20. What is the command to run the node programs? A. program.js B. node(program.js) C. node program.js D. node.program.js 21 / 29 21. 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) 22 / 29 22. 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 23 / 29 23. 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. Infinite loop 24 / 29 24. 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 25 / 29 25. 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 26 / 29 26. JavaScript is a _______________ language. A. Object-Oriented B. High-level C. Assembly-language D. Object-Based 27 / 29 27. Why does the Node rely on event handlers? A. APIs are reusable B. APIs are asynchronous C. APIs are synchronous D. APIs are modular 28 / 29 28. 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 29 / 29 29. 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 breaks out of the loop C. The continue keyword skips the next iteration D. The continue keyword skips the rest of the statements in that iteration Your score is LinkedIn Facebook VKontakte 0% By Wordpress Quiz plugin
