var func = => {foo: function {}}; // SyntaxError: function statement requires a name. The extends keyword indicates that the new class is derived from the base or parent class using inheritance, and export is not a keyword in Java. Marker interfaces are also known as the Tag interface. The output of the above code is shown below: In the above code, we have created a thread "f," and when started, A will be printed. Explanation: In the above code, we have declared count = 1. It leads to the poor performance or deadlock of threads. Thread-safe means that the methods and objects of a class are accessible by multiple threads at the same time. Think of it as a social-security number or employee id number for Python objects. This set of MCQ questions on the application layer in OSI and TCP/IP model includes the collections of multiple-choice questions on the application layer. PHP 7 also supports Type Declarations for the return statement. The number that is returned is used to inform the calling program what the result of the program’s execution was. Explanation: In the above code, there are three reference variables and two objects. The transcendental functions COS, COSH, EXP, LN, LOG, SIN, SINH, SQRT, TAN, and TANH are accurate to 36 decimal digits. 29) Which of the following is a reserved keyword in Java? If your security relies on specific standards and encryption methods, these standards don’t directly describe the behavior of a system, but rather help engineers with implementation guides. The CallableStatement can return either a single ResultSet object or multiple ResultSet objects. Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Synthesis of mechanism; 1) What is meant by order defect? When a subclass declares a variable with the same name as of the parent class variable. 1) Which of the following option leads to the portability and security of Java? 9) Which of the following is a valid long literal? List (int rows, boolean multipleMode): It creates a new list initialized to display the described number of rows along with the multiple selection mode. 40) What will be the output of the following program? If the remainder is equal to 1 on dividing the count by 2, it will print (***) else print (+++++). Exception in thread "main" java.lang.Error: Unresolved compilation problem: Answer: (c) Map m1 = Collections.synchronizedMap(hashMap); Explanation: By default, the HashMap class is a non-synchronized collection class. 1. The code will not execute without any specific value for Y; it results in exception, as shown below. Answer: (a) It returns the existing string from the memory. Skip to Main Content . If it’s not, type xinetd listen to fix the problem. In the option d), "\i" is used in place of "\u.". In Java, the most commonly used marker interfaces are Serializable, Cloneable, Remote, and ThreadSafe interfaces. We cannot return values but there is something we can surely return from void functions. All rights reserved. Your post asks several questions: What is the number returned from the function? Hence, the correct answer is the option (b). The intern() and toString() methods are of String class. But this isn’t always the case. Whereas, the wait() method does not release the locks of an object. Sanfoundry Global Education & Learning Series – Python. It generally consists of classes like java.lang.String, java.lang.Object, java.io.Exception, etc., and all packages and classes available in the rt.jar are known to the JVM. 43) Which of the following code segment would execute the stored procedure "getPassword()" located in a database server? The studentId is only a reference variable as it is not declared using the new operator. Explanation: The output of the Java compiler is bytecode, which leads to the security and portability of the Java code. 32) What will be the output of the following program? mcq_correct(ta) ... but the checkbox type returns the student's answer as Maxima list, even if they have only chosen one option. The character encoding can be either a default encoding dependent on the system or encoding that is explicitly defined. View Answer, 4. A will be printed, and then an exception is thrown. a) Custom function 30) Which keyword is used for accessing the features of a package? a) Module 41) What is meant by the classes and objects that dependents on each other? The body of a C++ function is surrounded by _____ A. parentheses B. angle brackets C. curly brackets D. square brackets 23. For example, if the string constant pool already has a string object with the same value, the intern() method will return a reference of the string from the pool. As I mentioned in the beginning of this guide that functions having different return types and same parameter list cannot be overloaded. Procedure. 1) The transfer function broken into product of transfer functions 2) The transfer function divided into addition of transfer functions 3) Factoring the numerator and denominator polynomials 4) Derivatives of the transfer functions a. Axiom, Decomposition, Dependent, Determinant, Union are key terms for functional dependency; Four types of functional dependency are 1) Multivalued 2) Trivial 3) Non-trivial 4) Transitive Procedure. Optional parameters can be used when arguments need not be compulsorily passed for a function’s execution. A Unicode escape sequence is made up of the following articles: Hence, the correct answer is the option (a). Which of the following types of information is returned by … But a final class can extend other classes. It is because of the execution order of the program. The optional parameter should be set as the last argument in a function. Functions can be used the same way as you use variables, in all types of formulas, assignments, and calculations.       for ( int i= 99; i>=0; i= i/9). So, the non-functional requirements part will set up specific types of threats that functional requirements will address in more detail. In other words, an empty interface (contains nothing) is known as the marker interface. 47) Which of the following modifiers can be used for a variable so that it can be accessed by any thread or a part of a program? Explanation: In Java, an exception caused by other exceptions is known as a chained exception. The reducer function is a pure function without any side-effects, which means that given the same input (e.g. That is, for f being identity, the equality f(x) = x holds for all x. Answer: (c) notify(), notifyAll(), and wait(). endsWith('', '') To use the greet() function, we need to call it. When we define a variable in a local scope with a variable name same as the name of a variable defined in an instance scope. For example. We can also say that, when an object is initialized but is not assigned to any reference variable, it is called an anonymous object. Which of the following is the use of id() function in python? 16) Which method of the Class.class is used to determine the name of a class represented by the class object as a String? The StringBuilder class is a mutable class, as it can be altered after it is created. b) Every object doesn’t have a unique id For more information about types and primitives, see also the JavaScript data structurepage. a) Module Variable Names, Operators, Data Types & Numeric Types, Precedence & Associativity, Bitwise & Boolean, Dictionary, Functions & Built-in Functions, Classes, Objects, Inheritance & Exception Handling, here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Python Questions and Answers – Function – 1, Next - Python Questions and Answers – Function – 3, Python Questions and Answers – Function – 1, Python Questions and Answers – Function – 3, Java Programming Examples on Mathematical Functions, Python Programming Examples on Searching and Sorting, Python Programming Examples on Stacks & Queues, Python Programming Examples on Linked Lists. The package keyword is used to create a new package. d) All of the mentioned In other words, it is used to import the user-defined and built-in classes and interfaces into the source file of java so that the current file can easily access the other packages by directly using its name. Answer: (d) A will be printed, and then an exception is thrown. A function computes a value in a subprogram. c) Improving clarity of the code 37) Which of the following is a valid syntax to synchronize the HashMap? You can specify an explicit type for each parameter, as described in the Parameters section. A subroutine call may also have side effects such as modifying data structures in a computer memory, reading from or writing to a peripheral device, creating a file, halting the program or the machine, or even delaying the program's execution for a specified time. Synthesis of mechanism - Mechanical Engineering (MCQ) questions and answers. Explanation: In Java, the return type of hashCode() method is an integer, as it returns a hash code value for the object. ANSWER: Function . d) rhombus 19) Which package contains the Random class? According to the IEEE Standard for Floating-Point Arithmetic (IEEE 754), if we divide 1/0 will give positive infinity, -1/0 will give negative infinity, and 0/0 will give NaN. Answer: (b) Default encoding of the host platform. Global is not a reserved keyword in Java. 2) Which type of solderability testing is carried out for the generation of solder sample due to immersion of wire or sheet metal specimen in a bath of molten solder? Instance block, method, static block, and constructor, Method, constructor, instance block, and static block, Static block, method, instance block, and constructor, Static block, instance block, constructor, and method. A directory of Objective Type Questions covering all the Computer Science subjects. The getClass() method of the Object class returns the runtime class of this object. Due to pointers, most of the users consider C-language very confusing and complex. 11) Evaluate the following Java expression, if x=3, y=5, and z=10: Explanation: In the above expression, ++z means that the value will first increment by 1, then used. Hence, an asterisk (***) will be printed eight times, and plus (+++++) will be printed seven times. Explanation: The initial or default quantity of an ArrayList is 10. Latest Posts. Here is an example to add two integers. Calling a Function. b) Class c) All of the mentioned Keep in mind that returning object literals using the concise body syntax params => {object:literal} will not work as expected. IOException and VirtualMachineError class, Exceptions occurred by the VirtualMachineError, Exceptions occur in chains with discarding the debugging information, It returns the existing string from memory, It modifies the existing string in the database, All the classes available in rt.jar is known to the JVM, notify(), wait( long msecs ), and synchronized(), wait( long msecs ), interrupt(), and notifyAll(), sleep( long msecs ), wait(), and notify(). It also refers to a programming bug or issue that occurs when the thread scheduler swaps the threads at any time between the process. 10) What does the expression float a = 35 / 0 return? Explanation: For every long literal to be recognized by Java, we need to add L character at the end of the expression. Explanation: When a String is created using a new operator, it always created in the heap memory. One is a byte stream, and the other is the character stream. The javap tool is used to get the information of any class or interface. 14) Which of the following creates a List of 3 visible items and multiple selections abled? However if the functions have different parameter list then they can have same or different return types to be eligible for overloading. Explanation: There are two types of I/O stream. b) Class Returning Functions. 17) In which process, a local variable has the same name as one of the instance variables? Explanation: The notify(), notifyAll(), and wait() are the methods of the Object class. The function-name is an identifier that represents the function. Explanation: Anonymous inner classes are the same as the local classes except that they don't have any name. The transcendental functions ACOS, ASIN, ATAN, and ATAN2 are accurate to 30 decimal digits. the return type of the function is void; the empty parentheses mean it doesn't have any parameters; the function body is written inside {} Note: We will learn about returnType and parameters later in this tutorial. This is the reason why Green Team (Java Team members) has not introduced pointers in Java. Returning 0 signals that there were no problems. Answer: (b) It does not release any locks. Explanation: According to the class hierarchy of Throwable class, the Error and Exception classes are the direct subclasses of the Throwable class, as shown below. This function returns the total number of CUSTOMERS in the customers table. COUNT (DISTINCT job_id) returns the number of rows excluding rows containing duplicates and NULL values in the job_id column. View Answer. You have to select the right answer to a question. To use the greet() function, we need to call it. Explanation: The sleep() method does not release any locks of an object for a specific time or until an interrupt occurs. STACK provides some helper functions. In C, if we do not specify a return type, compiler assumes an implicit return type as int. Values are returned by using the optional return statement. Then the code would execute. var func = => {foo: 1}; // Calling func() returns undefined! cab.executeQuery(); Explanation: In Java, java.sql.CallableStatement interface is used to call the SQL stored procedures in the database. To perform this task, we have created an user-defined addNumbers(). b. Similarly, there are two values of variable b, i.e., 5 and 30. Functions are the fundamental building block of any application in JavaScript.They’re how you build up layers of abstraction, mimicking classes, information hiding, and modules.In TypeScript, while there are classes, namespaces, and modules, functions still play the key role in describing how to do things.TypeScript also adds some new capabilities to the standard JavaScript functions to make them easier to work with. … Exception in thread "main" java.lang.Error: Unresolved compilation problem: Defining a Function. In other words, it is a program (tool) that reads a collection of source files into an internal form. On calculating the final answer is 24, as shown below. Functions are a useful way to split your code into logical blocks, allow modularization, turn it more readable, and make it reusable. Hence, the JVM will consider the value of a and b as 60 and 30 concerning the execution order. Explanation: There are following reasons for considering a variable shadowing, they are listed below: 18) Which of the following is true about the anonymous inner class? If a function does not have a return keyword, it will send a none value. The objects are referring to those variables that are created using the new operator. A returning function must end with a return statement. To synchronize the HashMap class explicitly, we should use the Collections.synchronizedMap(hashMap) method that returns a thread-safe map object. Answer: (a) Two bytes read/write at a time. Explanation: The getName() method of the Class class returns the name (as String) of the entity (class, interface) represented by this Class object. Example. A function can return at the most one value. This page contains MCQ questions covering topics Core Data Types, function return value, python round method & function Id return type. The strictfp keyword is a modifier that restricts the floating-point calculations to assure portability and it was added in Java version 1.2. c. Package. Which of the following refers to mathematical function? A function must be called so as to execute it. If you find it, change it to read disable = no. C. a function that checks whether the current second is an integer from 1 to 100. Explanation: In the above code, we have not defined the variable Y. The parameter-list consists of successive parameters that are separated by spaces. A function declaration tells the compiler about a function's name, return type, and parameters. 23) Which option is false about the final keyword? The Return Type. In mathematics, an identity function, also called an identity relation or identity map or identity transformation, is a function that always returns the same value that was used as its argument. Explanation: The Java Debugger (JDB or jdb) is a command-line java debugger that debugs the java class. This set of Python Questions for entrance examinations focuses on “Functions”. The following example illustrates how to create and call a standalone function. Nothing more, and nothing less. Use nslookup to verify that xinetd is listing on the port of the new sever. The CallableStatement can return either a single ResultSet object or multiple ResultSet objects. Therefore, a single operation of character stream performs two bytes read/ write at a time. Fork() has an interesting behavior while returning to the calling method. In C++, the above program is not valid except few old C++ compilers like Turbo C++. Calling a Function. c) User function According to the rules discussed above, an abstract method only has a method signature, not the method body. While INDEX could very well be used alone, nesting MATCH in the formula makes it a bit more useful. In this tutorial, We’ll demonstrate its usage to sort a string, list, tuple, and dictionary with examples. If control reaches the end of a function with the return type (possibly cv-qualified) void, end of a constructor, end of a destructor, or the end of a function-try-block for a function with the return type (possibly cv-qualified) void without encountering a return statement, return; is executed. at August 22, 2019. In other words, the intern() method returns a reference of the string. PHP 7 also supports Type Declarations for the return statement. 26) In which memory a String is stored, when we create a string using new operator? You can go through the link, (https://www.javatpoint.com/java-swing) to deeply understand the class hierarchy diagram. Often there is a result from such a task. at August 22, 2019. 4) What will be the output of the following program? JavaTpoint offers college campus training on Core Java, Advance Java, .Net, Android, Hadoop, PHP, Web Technology and Python. Python MCQ Quiz & Online Test: Below is few Python MCQ test that checks your basic knowledge of Python. 2) Which of the following is not a Java features? Syntax function function_name():return_type { //statements return value; } The return_type can be any valid data type. The function-body consists of an expression. Functions may also return value along with control, back to the caller. Most numeric functions return NUMBER values that are accurate to 38 decimal digits. Explanation: The rt.jar stands for the runtime jar that comprises of all the compiled core class files for the Java Runtime Environment. The need for synchronization is to perform thread-safe operations on the class. In C++, the above program is not valid except few old C++ compilers like Turbo C++. Return value: By applying the annotation to the function itself, the return value of the function is persisted as an Queue message. 27) What is the use of the intern() method? Explanation: Following are some rules for declaring an abstract method: In the above code, MyFirstClass is an abstract class. Answer: (a) Three reference variables and two objects are created. This was allowed in older C standard C89. Easily attend technical interviews after reading these Multiple Choice Questions. The Java code is portable, as the same byte code can run on any platform. Your post asks several questions: What is the number returned from the function? The transient and default are keywords in Java, but they are not used for accessing a variable by a thread from any part of the program. Explanation: If two or more threads are trying to access a common resource at the same time. An object of a superclass created in the subclass. Generally, the first exception causes the second exception.         Y cannot be resolved to a variable. a) Reducing duplication of code Therefore, for all odd numbers till 15 (1, 3, 5, 7, 9, 11, 13, 15), it will print (***), and for all even numbers till 14 (2, 4, 6, 8, 10, 12, 14) it will print (+++++). d) None of the mentioned 48) What is the result of the following program? The Byte stream is used to perform input or output 8-bit (equals to 1 byte) Unicode bytes whereas, the Character stream is used to read or write a 16-bit (equals to 2 bytes) Unicode character. 8. What will be the output of the following Python code? Numeric Functions . Explanation: The InterruptedException is thrown when a thread is waiting, sleeping, or occupied. If no external encoding is specified, it will use the default encoding of the host platform. View Answer, 3. Hence, the correct answer is an option (d). The notifyAll() method is similar to the notify() method, except that it wakes up all the threads that are waiting on the object's monitor. 13) Which of the following tool is used to generate API documentation in HTML format from doc comments in source code? I doubt this will be a problem, but it would be easy enough to change the type of id to string in the C#. Synthesis of mechanism - Mechanical Engineering (MCQ) questions and answers. Hence, an ArrayList with the default capacity can hold ten (10) values. Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Synthesis of mechanism; 1) What is meant by order defect? 3) What should be the execution order, if a class has a method, static block, instance block, and constructor, as shown below? The type() function returns the class of the argument the object belongs to. Developed by JavaTpoint. The execution order of the program is that the static block executes first, then instance block, and then constructor. The Runnable, Readable, and Result interface are not marker interface as they contain some methods or fields. If the fork() function is successful then it returns twice. 7. To create a list of 3 visible items along with the multiple selections abled, we have to use the following constructor of the List class. Hence, the correct answer is an option (c). Void functions are “void” due to the fact that they are not supposed to return values. Answer: (a) Bytecode is executed by the JVM. The parameter-list consists of successive parameters that are separated by spaces. How to approach. Image. And the rest three options are false about the anonymous inner classes as it can have both methods and objects. It means when we create an ArrayList without specifying any quantity, it will be created with the default capacity, i.e., 10. This section focuses on "Functions" of the Python programming. STACK provides some helper functions. Hence, the "o" and "e" are replaced by the characters "i" and "d," respectively, which results in "Cimpletd.". d) System function Duration: 1 week to 2 week. 3. The regex \W, \s, and \S are used for a non-word character, a whitespace character, and a non-whitespace character, respectively. If, when authoring a question, you switch from radio/dropdown to checkboxes or back, you will probably break a PRT because of mismatched types. Answer: (c) A final class cannot extend other classes. What will be the output of the following Python code? a. It contains an abstract method named num() that is not defined properly. Explanation: A mutable class is a class in which changes can be made after its creation. Also, functions are an intuitive way to create interfaces so the programmers can easily publicize their code. 21) An interface with no fields or methods is known as a ______. But in the output, the values of a and b are 60 and 30, respectively. In Java, main is the method that is the entry point of any program, and the System is a class. This Python Test contains around 20 questions of multiple choice with 4 options. c. Do not differ greatly for profit or nonprofit organizations but differ in small and large organizations . Q-6. 11 + 5 - 5 + 10 + 3 = 24. If we relate this to C, then they are actually the memory address, here in Python it is the unique id. When a method is overridden in the child class. This type is called a function. 2. Return true when the substring is found, or return false when not found. 50) What is the default encoding for an OutputStreamWriter? The stored procedures are similar to functions as they perform some specific tasks, except that they are only available in the database. The volatile keyword is not a replacement of a synchronized block or method as it does not remove the need for synchronization among the atomic actions. For example, \w+ matches one or more word character that is same as ([a-zA-Z_0-9] +). Three reference variables and three objects are created. ANSWER: Function . It is a different way of making a class thread-safe. Explanation: An interface with no methods and fields is known as the marker interface. Abstract methods are always defined inside an abstract class. A void function can do return We can simply write return statement in a void fun(). According to the string "Complete," "o" is at position 1, and "e" is at the position 7. Both studentName and stud_class are reference variables as well as objects. This set of MCQ questions on the application layer in OSI and TCP/IP model includes the collections of multiple-choice questions on the application layer. a) Id returns the identity of the object Some of cases are listed below. A four hexadecimal digits (a character from 0 - 9 or a-f or A-F). b) Decomposing complex problems into simpler pieces This was allowed in older C standard C89. 20) What do you mean by nameless objects? Notes. It does not have any fixed came name. This function is not case-sensitive. Thus here are 2 ways to do it: 1st: Return whole ajax response in a function and then make use of done function to capture the response when the request is completed. One reference variable and two objects are created. 9. Explanation: The final is a reserved keyword in Java that is used to make a variable, method, and class immutable. Every function should specify the return type in C++. 49) In character stream I/O, a single read/write operation performs _____. 39) Which of the following is a mutable class in java? The RETURN clause specifies the data type you are going to return from the function. Explanation: The OutputStreamWriter class translates Unicode character into bytes by using the character encoding. Map m1 = Collections.synchronizedMap(hashMap); Map m2 = Collection.synchronizeMap(hashMap); Abstract methods do not specify a method body, but they only have a method signature. In the above program, we have declared a function named greet(). Three reference variables and two objects are created. Answer: (d) An object that has no reference. Answer: (b) An exception caused by other exceptions. 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 … Two reference variables and two objects are created. Q20 Which of the following has a return type in its specification and must return a value specified in that type? Explanation: A char literal may contain a Unicode character (UTF-16). 10. 45) If three threads trying to share a single object at the same time, which condition will arise in this scenario? Whereas, the second import statement only imports the Object class of the java.lang package. The syntax to declare a function with optional parameter is as given below − Any type may be returned, including arrays and objects. Tight coupling is the correct answer as it is used when the logic of one class is called by the logic of another class. It generally occurs during the execution of multi-threaded application. d. None of the mentioned options . And the value of variables c and m is 0 as we have not assigned any value to them. The option b, c, and d, are not valid because: 8) What is the return type of the hashCode() method in the Object class? Although all the approaches regarding the use of async: false are not good because of its deprecation and stuck the page untill the request comes back.