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| Question | Answer |
|---|---|
| File extension name of a java file. (.java | .javac | .javax | .class) | .java |
| Netscape Navigator was developed in 1995 to support Java. | True |
| Every statement in Java language should end with "<>"? | false |
| `boolean` data type has only two values | true |
| Correct command for running a java application named `Hello.java` using console (`javac Hello.java` | `javac Hello.txt` | `java Hello` | `java Hello.txt`) | java Hello |
| The goal in developing netbeans was to write a Delphi- like Java IDE in Java for the first time. | true |
| What is the name of the class in this program: `class HelloJava{ public static void main(String args[ ]){ System.out.println(“Hello Java”); } }` (`String args` | `HelloJava` | `System` | `main`) | HelloJava |
| A file that is compiled to produce bytecode file (word file | class file | procedures | java source code) | java source code |
| A valid Identifier or name in Java language can start with which character? (option2: $, _ | both option1 and option2 | option1: a-z, A-Z | 0-9) | both option1 and option2 |
| Java is a portable language that could run on any platform. The language was able to do this by generating intermediate code for a hypothetical computer called a virtual machine. | True |
| A java edition that is It is developed using the Java Community Process (Micro Edition | Standard Edition | Enterprise Edition) | Enterprise Edition |
| Most IDEs today doesn't have GUI modeling utilities that simplify the development of UIs. | false |
| `long` has a value that ranges from -32768 to 32767 | false |
| Java Wrapper Classes are used in converting one data type into another data type. | true |
| A feature of Netbeans that makes it easy to create, deploy and import java beans. (Java 2 Platform, Micro Edition (J2ME) MIDP development | Web Services Development | Enterprise Java Beans (EJB) Development) | Enterprise Java Beans (EJB) Development |
| The __________ creates a software simulation of a CPU and memory and handles all communication between the Java program and the underlying operating system and hardware. (JMV | MJV | JVM | JJM) | JVM |
| A function in C language is similar to what in Java language? (Member | None of the above | Variable | Method) | Method |
| `static` is a not the state of a method | false |
| What are the valid White Spaces available in Java language? (Enter | All the above | Tab | Space) | All the above |
| `println()`provides string formatting. | false |
| `static` is a state of a method | true |
| `byte` has a maximum value of 128 | false |
| All methods and variables in Java language are kept inside a Class? | true |
| The `main` method is declared `public` so that it is accessible as part of the public interface of the program. | true |
| The class file is normally compiled to produce the bytecode file (.class file) which is normally interpreted by the Java virtual machine (JVM). | False |
| `short` has a width of 2 bytes | true |
| A documentation or javadoc comment is enclosed between `/**` and `*/` | true |
| A Netbeans feature that gives it an extensible Component Palette pre-installed Swing and AWT components, showing a components tree and properties, automatic code generation and full JavaBeans support. (Version control Support | XML | GUI Builder) | GUI Builder |
| `nextLine()` reads a String value from the user. | true |
| Netbeans feature w/ wizards for making web services and web services clients, providing the basic code needed, and easy to use testing tools. (Micro Edition MIDP development | Enterprise Java Beans (EJB) Development | Web Services Development) | Web Services Development |
| C++ is a general-purpose, concurrent, class-based, object-oriented language that is specifically designed to have as few implementation dependencies as possible. | False |
| The identifier name may be a reserved word. | false |
| In standalone Java applications, which method is mandatory? (display method | show method | print method | main method) | main method |
| The `System` keyword defines a template for an object of derived type HelloWorld | false |
| A java edition that provides a robust, flexible environment for applications running on embedded and mobile devices in the Internet of Things (Enterprise Edition | Micro Edition | Standard Edition) | Micro Edition |
| Netbeans feature w/ Syntax highlighting for Java, XML, HTML, CSS, JSP and IDL, full support of new JDK 1.5 features, live parsing/error marking, popup javadoc, code completion, and fast class importing. (Award Winning Debugger | Code Editor | Refactoring) | Code Editor |
| An IDE doesn't have Compiler and/or interpreter. | false |
| `nextB()` reads a byte value from the user. | false |
| A string is enclosed with double quotation marks. | true |
| Netbeans started as a student project called Selfie | false |
| `\n` is an escape character for new line. | true |
| It reads a `boolean` value from the user. (`nextBoolean` | `nextBool` | `nextBoolean()` | `nextBool()`) | nextBoolean() |
| One of the tools for Object oriented design doesn't include class browser | false |
| An IDE may have Various tools to simplify the construction of a GUI. | true |
| `float` has a width of 8 bytes | false |
| A single-line comment starts with `//` | true |
| One of the tools for Object oriented design includes object inspector | true |
| `printf()`provides string formatting. | true |
| What is the need to mention `static` before `main` method? (Option2:To make main method as class method common to all instances | Option1 : To call main method without creating an object of class | None of the above | Both Options 1 and 2) | Both Options 1 and 2 |
| `nextInteger()` reads a integer value from the user. | false |
| `out` is a `private static` field | false |
| `nextLong()` reads a long value from the user. | true |
| Netbeans Matisse doesn't support internationalization, and industrial look-and-feel rules, which is very important for large scale application meant to be spread world wide. | false |
| A feature of Netbeans for renaming, changing and moving of various objects, field encapsulation and usage finding. (Award Winning Debugger | Refactoring | Code Editor) | Refactoring |
| `API` stands for Application Programmable Interface | false |
| The `main` method is declared `private` so that it is accessible as part of the private interface of the program. | false |
| The command to compile a java source code. (`javadoc` | `java` | `javac`) | javac |
| `nextFloat()` reads a float value from the user. | true |
| `double` data type has a width of 16 in bytes. | false |
| Means that Java can be programmed without extensive programmer training while being attuned to current software practices (Simple, object-oriented, and familiar | High performance | Architecture neutral and portable | Interpreted, threaded, and dynamic) | Simple, object-oriented, and familiar |
| What is the name of the class in this program: `class Square{ public static void main(String args[ ]){ System.out.println(“This is a Square”); } }` (`Square` | `main` | `System` | `String args`) | Square |
| A feature that the Java interpreter can execute the bytecodes directly on any machine to which the interpreter (Simple, object-oriented, and familiar | Architecture neutral and portable | Interpreted, threaded, and dynamic | High performance) | Interpreted, threaded, and dynamic |
| Identifiers are names that are given by the programmer as name of variables, methods or functions, classes etc | true |
| `print()` prints string inside the quotes then the cursor moves to the beginning of the next line | false |
| `main` method is `void` because the Java interpreter does not expect to receive or process any output from the class. | true |
| What is the default return type of a method in Java language? (`int` | `void` | `short` | None of the above) | void |
| `String` is a derived data type | true |
| Who developed Java? (James Gosling | None of the options | Dennis Ritchie | Bjarne Stroustrup) | James Gosling |
| The `class` keyword defines a template for an object of derived type HelloWorld | true |
| A multi-line comment enclosed within `/* …. **/` | false |
| arithmetic operator is a mathematical function that takes two operands and performs a calculation on them. | True |
| An operator that shifts bits to the left or right shift. | shift operator |
| The for loop executes a given statement or block of statements repeatedly as long as the value of the expression is true. | false |
| The _______ statement causes the program flow to exit from the body of the switch construct | break |
| The ______ statement causes the program flow to skip over and jump to the end of the loop body, and then return the control to the loop control statement. | continue |
| The do-while loop facilitates evaluation of condition or expression at the end of the loop to ensure that the statements are executed at least once | true |
| What is the Enhanced for Loop (foreach)? | It transverses all elements of a collection. |
| Checks if the values of two operands are equal or not, if values are not equal then condition becomes true. ( ! | == | = | != ) | != |
| The _____ statement performs a different set of statements if the expression is false. | else |
| What is the result of 7|2 | 7 |
| What is the operator in which The left operands value is moved right by the number of bits specified by the right operand and shifted values are filled up with zeros. | >>> |
| The ________ identifies any valid statement to which control must be transferred | label |
| The statements associated with this keyword is executed if the value of the switch variable does not match any of the case constants. | default |
| An operator that multiplies values on either side of the operator. ( * | / | - | + ) | * |
| increase the value of the variable by a particular number by which it is increased ( increment op | decrement op ) | increment op |
| unary operator is an operator used to perform bitwise operations on bit patterns or binary numerals that involve the manipulation of individual bits | false |
| The statements associated with else keyword is executed if the value of the switch variable does not match any of the case constants. | true |
| The else statement performs a different set of statements if the expression is false. | True |
| It adds right operand to the left operand and assign the result to left operand. ( += | *- | -= | /= ) | += |
| The lbl identifies any valid statement to which control must be transferred | false |
| The for loop facilitates evaluation of condition or expression at the end of the loop to ensure that the statements are executed at least once | false |
| is an operator used to perform bitwise operations on bit patterns or binary numerals that involve the manipulation of individual bits | bitwise operator |
| If both the operands are non-zero, then the condition becomes true. ( && | ! | || ) | && |
| An operator that has the effect of 'flipping' bits. | ~ (bitwise complement) |
| What is the index value of the first element? | 0 |
| The for loop is for traversing items in a collection | false |
| Cast operator is used in converting one type into another type or an object into another | true |
| Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true. | > |
| The break statement causes the program flow to exit from the body of the switch construct. | true |
| Increment operators increase the value of the variable by a particular number by which it is increased | true |
| When a piece of code runs unintentionally forever it is known as | infinite loop |
| Checks if the value of left operand is greater than or equal to the value of right operand, if yes then condition becomes true. | >= |
| An operator that copies a bit if it exists in either operand. | | (bitwise OR) |
| unary operator is an operator that takes only one value for its operation | true |
| It is a mathematical function that takes two operands and performs a calculation on them. | arithmetic operator |
| It consists of three operands and is used to evaluate Boolean expressions | ternary operator |
| What is the result of -7%2 | -1 |
| Behavior acts like the ______ of an object. | verbs |
| Where does a java program start executing instructions from (object | source file | main method | class ) | main method |
| T or F. OOP describes the task to be performed on objects. | True |
| T or F. You must explicitly extend class Object. | False |
| Custom Methods – implement the business rules for which the application is being developed | True |
| this can be used to refer current class instance variable. | True |
| These variables identify the data stored in the object. | Attributes |
| Accessor (Getter) – a method that is used to access or retrieve data. | True |
| `this` keyword can be used to invoke current class method (implicitly) | True |
| Encapsulation is also called as? (Data Hiding | Data Encapsulation | All of the Above) | Data Hiding |
| Encapsulation is supported by ___________ ( Classes | Objects | Methods ) | Classes |
| What type of inheritance does Java have? | Single Inheritance |
| Which feature can be implemented using encapsulation? | Abstraction |
| Which among the following best defines single level inheritance? ( A class which gets inherited by 2 classes | A class inheriting a derived class | A class inheriting a base class) | Class inheriting a base class |
| The private member's are made public to all the classes in inheritance. | False |
| If class A and class B are derived from class C and class D, then ( That is multilevel inheritance | Those are 2 pairs of single inheritance | Those are enclosing class ) | Those are 2 pairs of single inheritance |
| Which programming language doesn't support multiple inheritance? | Java |
| Method overriding is combination of inheritance and polymorphism? | True |
| Which of four pillars is a mechanism by which object acquires the properties of another object? | Inheritance |
| Which of the four pillars is often expressed by the phrase, 'One interface, multiple methods'? | Polymorphism |
| Procedural Programming is a technique of solving a problem and breaking it down into smaller parts and solving each of the smaller problems. | true |
| Mutator (Setter) – a method that is used to change the data. | true |
| Standard Methods – used to change or access the private data in an object. | true |
| final Variable: constant variable | true |
| Constructor – declared either at the start or end of a class definition. These variables identify the data stored in the object. | False |
| Constructor – a method that is automatically executed when an object is created. This method is used to initialize the attributes. | true |
| How can Encapsulation be achieved? ( Using Abstraction | Using only private members | Using Inheritance | Using Access Specifiers) | Using Access Specifiers |
| What type of inheritance does Java have? | Single Inheritance |
| In Inheritance, the programmer can change one part of the code without affecting other parts | False |
| Abstraction is the way to add functions in a user defined structure. | False |
| Encapsulation is supported by ___________( Methods | Classes | Objects) | Classes |
| The private member's are made public to all the classes in inheritance. | False |
| In hierarchical inheritance, all the classes involve some kind of inheritance. | False |
| The private members of the base class are visible in derived class but are not accessible directly. | True |
| Which constructor will be called first from the classes involved in single inheritance from object of derived class? ( Base class | Derived Class | Both at the same time) | Base class |
| Which is the correct syntax of inheritance? | class derived_classname : access base_classname{ /*define class body*/ }; |
| What is it called where child object gets killed if parent object is killed? ( Aggregation | Composition | Association | Encapsulation ) | Composition |
| Which concept of the four pillars is achieved by combining methods and attribute into a class? | Encapsulation |
| `this` keyword can be passed as an argument in the method call. | True |
| `this` - It can be used to access class variables and methods. | True |
| Encapsulation has poor control of class attributes and methods | False |
| Which among the following should be encapsulated? ( Data which is prone to change in the near future | Data prone to change in long terms | Data which belongs to some other class | Data which is intended to be changed ) | (1) |
| Members which are not intended to be inherited are declared as ________________ | Private |
| Encapsulation means "open to all" and indicates that the internal workings of an object are entirely visible to the outside world. | False |
| Which of the these is the functionality of 'Encapsulation'? ( Binds together code and data | Using single interface for gen. class of actions | reduce complexity | all of the mentioned) | Binds together code and data |
| Which one of these is a data type? (bit | gold | fold | byte) | byte |
| Standard Methods – implement the business rules for which the application is being developed | False |
| Construct – a method that is automatically executed when an object is created. This method is used to initialize the attributes. | False |
| Using encapsulation data security is ___________ (Ensured to some extent | Very low | Purely ensured | Not ensured) | Ensured to some extent |
| There is an Increased security of data with Encapsulation | True |
| How can you make the private members inheritable? | It can be done both by making the visibility mode public or protected |
| If a base class is inherited in protected access mode then which among the following is true? | Public and Protected members of base class becomes protected members of derived class |
| Which among the following is correct for a hierarchical inheritance? | One base class can be derived into other two derived classes or more |
| Which concept will result in derived class with more features (consider maximum 3 classes)? | Multiple Inheritance |
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