The term traverse is referred to "going or accessing each element of the array at least one time". Poland, (+ Explanation: As we can see in the given code, the "x1" array is defined but with the null values by which we can easily access the index 0,1,2 of it. 90) A directory of Objective Type Questions covering all the Computer Science subjects.

JavaScript is a case-sensitive language. 971) Answer: C: "alert("Hello World");" is the correct answer. The "unshift()" is used for inserting the data element/item in the beginning of the array while the "shift()" method shifts the data item to the beginning of the array from the higher index, empty the last index of the array and returns the updated length of the array. 91) Russia, (+ 973) B - Its value is a string indicating the data type of the operand. 20) Similarly, if the result of any numerical operation is beyond the largest negative number, JavaScript prints negative infinity. Afghanistan, (+ Explanation: In JavaScript, as the only particular case of the "new" operator, the grammar is simplified by JavaScript by allowing the parentheses to be removed when there are no arguments passed in the function calling. 158) Which of the following built-in method is used to remove the last element from an array and return that element? Mexico, (+ There are several other ways to call JavaScript code such as submit, onclick, and onload, etc. It is not OOP's based language, because it doesn't have three basic properties of object-oriented programming languages, such as polymorphism, encapsulation, and inheritance. and Afghanistan, (+ Explanation: The "counter()" method used in the above code made increment in the value of the variable by one each time it is called, and the" reset()" function resets the value of that variable to zero. 45) Explanation: The definition of any function always begins with a "keyword" function, followed by an identifier which is the name of the function as well as with a pair of parentheses that cover the list of identifiers. Germany, (+ Single Line Comment in JavaScript Starts with _________ Symbol. Explanation: The variables whose value can be modified that kind of variable are known as Mutable variable. Answer: B: It uses === and !== instead is the correct answer. Hungary, (+ 87) Which one of the following options is the correct output for the given code of javascript? 70) Which one of the following is the correct output for the given JavaScript code? A - JavaScript is a lightweight, interpreted programming language.

Which of the following is true regarding JavaScript? 109) Which one of the following options is the correct output for the given code of JavaScript? Local Variables are Destroyed as soon as ______________. B 3. It always starts with the function expression which identifies the certain function to be called or executed. 126) What is required in order to implement the Lexical Scoping? It can also be thought of as multiple plots associated with time. Here this method searches for the largest integer in the whole array. You want the background color of the image to be transparent. Statements such as "break" and "continue" are commonly used in the definition of a loop to jump out of the loop (or to skip the rest statements inside the definition of the loop). If the object of the "for" loop statement creates a new property on the object, that property is usually not enumerated. A callback is a plain JavaScript function passed to some method as an argument or option. 37) Which one of the following is an ternary operator: Explanation: In JavaScript, only one ternary operator is supported, known as the conditional operator, which combines three different expressions into one expression. Dynamic subclass binding is an example of the Factory design pattern. It is used to add one or more elements to the front of an array and returns the new length of the array. Another important point is that switch statements are also used as an alternative to "if-else" statements to reduce the complexity and size of the code. Zimbabwe, (+ Saudi Arabia, (+

Explanation: If the body of the "for" loop removes any of the property that has been not enumerated yet, normally that property not gets enumerated. 39) Which of the following is the correct output for the following JavaScript code: Explanation: In the following JavaScript code, the "?" The functions which does not have the return statement in their definition does not return any value but few of them also return value by default even if they do not contain a return statement. Object class: It is a kind of string which classifies the type an object. Albania, (+ It passes every element of the array on which it is invoked to the function we specify, and returns an array containing the values returned by that function. Egypt, (+ 28) What will be the output of the following JavaScript code? 74) What kind of work is being performed in the following given part of JavaScript's code? JavaScript is a light-weighted and interpreted language. JavaScript is a high-level programming language. For Example, After a function has been stored in a variable, we can use that variable as a function, 101) In JavaScript, the definition of a function starts with____. Mail us on [emailprotected], to get more information about given services. Explanation: In JavaScript, the "use strict" is not a keyword because it not includes any language keywords. 40) Which one of the following is correct output for the following given JavaScript code: Explanation: In the above given JavaScript code, the "in" operator is used which checks (or performs search) for the specific property. 95) What output we may get if we execute the following JavaScript code: Explanation: In the above-given code, the "continue" keyword mentioned which is commonly used in loops for skipping the specific iteration of a loop and jumping to the next iteration of the loop without exiting the loop's body. Hence each of the property contains a name and value. Netherlands, (+ Explanation: In general, every object instance has a unique property which indicates the constructor function that created it. 75) A set of unordered properties that, has a name and value is called______. a variable type cannot be changed after the variable has been initialized. This preview shows page 1 - 2 out of 5 pages. Finland, (+ 2.

Explanation: The variable's value will increase until it gets equal to 10, then the control will exit the loop's definition. Explanation: A closure is created each time a function is created in JavaScript. Portugal, (+ In the JavaScript, only arrays and objects are mutable but not the primitive values. 82) 100) In which events/scenarios, A function name gets optional in JavaScript? It is a distributed database from Apache. 234) Here the comparison performed in the "if" statement evaluates to false, so the instructions written in the else part gets executed. 2) Which of the following is the correct output for the following JavaScript code: Explanation: The output of the above snippet code will be one because, first of all, the interpreter will search "obj" for the property (y). This method traverses the whole array just like we use the "for" loop to traverse the array. $$ Explanation: The "parseIn()" is a pre-defined method of the JavaScript that parses a string, and as a result, it returns an integer. 26) Suppose we have a text "human" that we want to convert into string without using the "new" operator. 33) First of all, the Initialization of the variable is done, then the condition gets tested, and after executing the code written in between curly braces, variable's value gets incremented. It is used for joining the data-items of an array and converts them into a string. Explanation: It is necessary to include not only that function's code in the internal state of the function's object, but also to provide references to the current scope chain. 48) 31) JavaTpoint offers too many high quality services. Germany, (+ It passes the data-items of an array into another array. Explanation: The Objects in the JavaScript are considered as a set of unordered related data(or properties), reference types, in the form of "key: value" pairs. 380) 64) While using square brackets, the expression always evaluates to the string, or in the form of a value that is converted into a string. traversing the array from the 0 index value) just like it working in the above code. Q 11 - Which of the following is true about cookie handling in JavaScript? Which of the following is the correct comparison operator for equals? 7) 120) If the following lines of code differ, what is the difference? 52) 977) Q 22 - Which of the following type of variable takes precedence over other if names are same? 234) Q 5 - Which of the following is a disadvantage of using JavaScript? Q 13 - Which of the following is the correct syntax to redirect a url using JavaScript? Explanation: The "slice()" method used in the above program a built-in function of the JavaScript and it is used to delete/remove the data items from the array. India, (+ In the dynamic scoping, it does not matter that how the code is written but what matters is how's the code executes. It returns a property's descriptor for that property, which directly presents on an object and not present in the object's prototype of the certain object.

a. in 154) What are the different alternatives of == and != in JavaScript? 124) What output will be returned by the function in the following code? 19) When there is an indefinite or an infinite value during an arithmetic computation in a program, then JavaScript prints______. After concatenation, both the strings are shown as a concatenated string. A - document.location='http://www.newlocation.com'; B - browser.location='http://www.newlocation.com'; C - navigator.location='http://www.newlocation.com'; D - window.location='http://www.newlocation.com'; window.location='http://www.newlocation.com'; is the correct option. 49) Explanation: In general, each object contains three object associated attributes: Object prototype: It is kind of reference/indication to another object from which properties are inherited. 147) What was the original name of JavaScript when it discovered? 973) When JavaScript was discovered, it was initially called Mocha, then renamed to LiveScript, and finally to JavaScript when Netscape and Sun did a license agreement. When the switch statement is executed, the value of the expression is calculated and compared to the case labels, and looks for a case whose expressions produce the same value after evaluations (where the comparison is determined by the === operator). c. an automated software agent like a web crawler client, 6. Code B looks for the existence of the obj1 and obj2. Answer: B: "The syntax of JavaScript is loosely based on the syntax of Java" is the correct answer. Hence the graphics generated in the dynamic manner from the real time data utilize the huge part of the CPU cycles. 146) Which of the following is the correct statement of WHILE loop start? Bahrain, (+ The above code is an invoked expression: in which a function a.x and two arguments "g" and "h" are separated by commas. JavaScript is a lightweight, interpreted programming language. Saudi Arabia, (+

JavaScript code contain sequence of ___________. The function definition expression (or we can say a function literal) consists of the keyword Function, followed by the set of identifiers(or parameters names) that are separated by commas inside the parenthesis, and a small block of JavaScript code(which we normally called function body/definition) enclosed in the curly braces. Mexico, (+ Netherlands, (+ Calculate current week number in JavaScript, Calculate days between two dates in JavaScript, How to Convert Comma Separated String into an Array in JavaScript, How to create dropdown list using JavaScript, How to disable radio button using JavaScript, Check if the value exists in Array in Javascript, How to add a class to an element using JavaScript, How to calculate the perimeter and area of a circle using JavaScript, How to find factorial of a number in JavaScript, How to get the value of PI using JavaScript, How to make a text italic using JavaScript, How to get all checked checkbox value in JavaScript, How to add object in array using JavaScript, How to check a radio button using JavaScript, JavaScript function to check array is empty or not, Implementing JavaScript Stack Using Array, Event Bubbling and Capturing in JavaScript, How to select all checkboxes using JavaScript, How to add a WhatsApp share button in a website using JavaScript, How to Toggle Password Visibility in JavaScript, Get and Set Scroll Position of an Element, Getting Child Elements of a Node in JavaScript, Remove options from select list in JavaScript, Check if the array is empty or null, or undefined in JavaScript, How to make a curved active tab in the navigation menu using HTML CSS and JavaScript, block that combines a number of statements into a single compound statement, both conditional block and a single statement, The values of count variable are logged or stored in a particular location or storage, The value of count from 0 to 9 is displayed in the console. Explanation: The JavaScript code can be called simply by making the function call to the element on which the JavaScript code execution has to be run. Poland, (+ Explanation: Whenever a "return" statement is encountered by the program control inside the function's definition, it stops the execution of that function. In this task, the object's state converted into a string, that also can be restored if needed. 113) Which one of the following codes is correct for concatenating the strings passed into the function? 108) Which one of the following options is the correct output for the given code of JavaScript? 153) Which of the following is the correct syntax to create a cookie using JavaScript? Explanation: A "constructor " is a function property of any class that is typically used for object of that class . Explanation: In JavaScript, the "typeof" operator is used for knowing the data type of the specified operand that can be a data structure or literal like an object, method, and variable. Netherlands, (+ A strict comparison will give true as output only when the content and the data type of both operands are same. Copyright 2011-2021 www.javatpoint.com. The value of that individual property is itself an object. getElement ("availablecourse").innerHTML = "See the list of availablecourse"; getElementById ("availablecourse").innerHTML = "See the list of availablecourse"; getId ("availablecourse") = "See the list of availablecourse"; getElementById ("availablecourse").innerHTML = See the list of availablecourse; JavaScript is a stripped-down version of Java. Answer: A: "while (i <= 10)" is the correct answer. Which built-in method returns the calling string value converted to upper case? Using typeof operator, we can get the type of arguments passed to a function. Explanation: The object creation expression creates a new object and also invokes a method called constructor in order to initialize the properties of that object. 968) Idiosyncrasies between various browsers and operating systems make it easy to test for all potential client configurations.

Ghana, (+ 107) Which one of the following options is the correct output for the given code of JavaScript? Explanation: JavaScript is not a pure OOP's (object oriented programming) based languages such as PHP, java or many other languages, although it is an object-based language. a. a screen reader used for Accessibility purposes for the visually impaired. 1) 106) Which one of the following options is the correct output for the given code of JavaScript? Explanation: The "map()" method is one of the built-in methods of the JavaScript that is used for mapping the data-items of the array, which can be used later for some other purpose. Integer Variable + Character Variable + Undefined Variable = ______________ Value. Cambodia, (+ 78) What will be the output of the following JavaScript code? Explanation: In the "for" loop statement, first of all, the variable's initialization takes place and checks the condition of the given expression. 34) 144) Which of the following is not a JavaScript framework or library? Which of the following is NOT an advantage of client-side scripting? The "reduceRigth()" method does the same work of reducing the array to a single individual value and calls or executes a certain function on each element of the array but in the right to left manner. 27) Explanation: The function name is optional for functions defined as expressions. By using this website, you agree with our Cookies Policy. United Arab Emirates, (+ 49) is a well known explanation for variables, properties of objects, and elements of arrays. Explanation: The "addition()" function was defined in the first line of code using the "new" property. Guinea, (+ 968) This GATE exam includes questions from previous year GATE papers. This method is used to remove the data elements from the beginning and return it along with the new length of array. This method executes a provided specific method on each data-item or element of the array in the left to right manner. India, (+ 46) Mauritius, (+ Which of the following is NOT an advantage of client-side scripting? 6) When interpreter encounters an empty statements, what it will do: Explanation: In JavaScript, when the interpreter encounters a empty statements it normally ignores or not response to that empty statement. Answer: D: "Mocha" is the correct answer. Which file format would be best if we wish to have an anti-aliased, For the list shown below,which of the following is the proper HTML code to create the list? At the time of execution of every new function, a new scope associated with it gets pushed onto the stack and this scope normally stored along with the function call stack.At that point, when a variable is referenced in a function's definition, the scope is immediately checked in every call stack to know if it returns a value. The object creation expressions are just like the invocation expressions except that they prefixed with a keyword commonly known as New. The empty statements also sometimes very useful like we use the empty statements for creating loop for nothing. ternary operator is used for comparing the values and place is determined (or initialized) according to the true condition that whether it returns true (1) or false (0). Both are x and y are equal in value only. Answer: C: Conditional operator is the correct answer.

Explanation: The output of the above JavaScript code will be undefined. It can place elements in ascending order, in descending order or random order. It takes values as arguments passed to it, and displays that value in arguments inside the console when the code is executed. Both the arrays can contain string or the integers. 48) 33) Which is the correct way from the following to do so: Explanation: There are three common ways to convert the text into strings:value.toString(),"" + value and String(value). 23) Which of the following function of the String object returns the character in the string starting at the specified position via the specified number of characters? Are the new features implemented as one thing into browsers? The _________ operator can determine the existence of a key before it is used to Answer: B: The pop() method is the correct answer. Therefore, it is saying something that is not true, makes it true. All rights reserved. 54) Which one of the following symbol is used for creating comments in the javascript: Explanation: The single line comments always starts by the "//" and any text written in between the "// "and the end of the line is considered as comment and ignored by the JavaScript. 47) What we will get if we compare the "one" with "8" using the less than operator ("one"<8)? 8) In the following given syntax of the switch statement, the Expression is compared with the labels using which one of the following operators? 5. South Korea, (+ Developed by JavaTpoint. 138) Which of the following is the correct syntax to print a page using JavaScript? 41) Ukraine, (+ Answer: document.getElementById ("availablecourse").innerHTML = "See the list of availablecourse"; is the correct answer. JavaScript has object-oriented capabilities that allows you to build interactivity into otherwise static HTML pages. b) If both values are undefined and both are null, they are Equal. Switzerland, (+ Explanation: The value of variable x will decrease 2 times when the loop body executes and the body will execute 4 times until the variable's value of j is 0. Explanation: In JavaScript, the reduce() method reduces the size of the array to a single value. Tajikistan, (+ 358) 116) What will be the correct output of the following JavaScript code? Explanation: The "!=" operators returns false if both the given values are equal. 85) Which one of the following options is the correct output for the given code of JavaScript? Answer: D: "Float" is the correct answer. Explanation: The "pop()" method is used for removing the last element of the array, or we can say, it removes/deletes the element from the tail-side of an array. Pakistan, (+ 32) They are called_____. JavaScript supports only the following Data types: Answer: A: document.cookie = 'key1 = value1; key2 = value2; expires = date'; is the correct answer. 96) What will be the output of the following JavaScript code? We can access the largest index of the array in which any value or even null value is defined. c. JavaScript is popular for its ability to run on any platform with a JVM installed. Georgia, (+ 16) Which one of the following is the correct way for calling the JavaScript code? In the above given code, both 1,2 statements are creating the instance of the class. 355) 38) "An expression that can legally appear on the left side of an assignment expression." 263) Function expressions are sometimes defined and implemented immediately. 973) 49) Which one of the following operator returns false if both values are equal? 86) Which one of the following options is the correct output for the given code of JavaScript? 355) Turkey, (+ C - JavaScript is complementary to and integrated with Java. If the list of identifiers includes more than one identifier, they are separated by commas. Whenever the return statement gets encountered in the definition of the function, the execution of the function will stop, and it returns the stored value to the statement where the function call has been made. 224) C Select one: a. 7) B - JavaScript can read, create, modify, and delete the cookie or cookies that apply to the current web page. A program uses two classes: Dog and Poodle. A - JavaScript variable names must begin with a letter or the underscore character. Pakistan, (+ Local Variables: A local variable will be visible only within a function where it is defined. The returned digit represents the counterclockwise angle in radians (instead of degrees) between the positive X-axis and the point (x,y). 32) The significant advantage of using this method is instead of making changes in the existing array it returns a newly created array. When we say that JavaScript variables are a dynamically typed we mean that. 1. South Africa, (+ Nigeria, (+ 58) If the following piece of JavaScript code is executed, will it work if not, what kind of possible error can occur? Q 10 - Can you access Cookie using javascript? 351) Which of the following function of Array object removes the first element from an array and returns that element? 131) Which one of the following algorithmic languages is not the lexical scoping standardized in? United Kingdom, (+ Russia, (+ 123) Which one of the following is not a example of closures? Please mail your requirement at [emailprotected] Duration: 1 week to 2 week. Integer Variable is declared using following syntax in JavaScript. This avoids manipulation/change in all existing values, properties, and attributes. 114) Which of the following values will be returned by the last statement in the given code? In addition, we can also use the "For-in" loop statement for performing the same task more efficiently. In the "x2" array, we cannot access the index 0 because the "x2" array is declared, but it is not defined till now. In a "for loop", these three are very crucial manipulations. This is an extension of the "if-else" statement and is also known as the "if-else ladder". For example, consider the following given code: However, we can see that in given question only one argument is passed, so it will definitely result in an error. A - A callback is a plain JavaScript function passed to some method as an argument or option. However, there is an exception in JavaScript, dividing zero with zero will not have any defined number/value so, the result of this specific operation is a special value "Not a Number" (or NaN) and printed as NaN. Explanation: The given pattern is applied on the string "text" enclosed in the parenthesis. 12) Which of the following is the correct output for the following JavaScript code: Explanation: If we look at the given code carefully, we can see that here the "break" statement is not used after any of the case labels.