Basics Of Java Programming Language Quiz
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Are you a hoard core Java programmer? If so, you must be aware of the basics of the Java programming language. This quiz will tell you if your basics are strong or if you still need more practice. Java is a high-level and object-oriented programming language used to develop mobile, web, and desktop apps. What else do you know about Java? Let's test out how good you score here on this quiz. All the best, coder!
- 1.
Before you start: if something is written in quotation marks("quote") then it means Java code What is the name for an application that changes a human-readable programming language into a machine-readable language?
- A.
Compiler
- B.
Converter
- C.
Encoder
- D.
Decoder
Correct Answer
A. CompilerExplanation
A compiler is a program that translates a high-level programming language into machine code or a lower-level language that can be understood by the computer's processor. It takes the human-readable code and converts it into a machine-readable format, allowing the computer to execute the instructions. Therefore, a compiler is the correct answer for the name of an application that changes a human-readable programming language into a machine-readable language.Rate this question:
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- 2.
Which applications can you use to edit Java code?
- A.
Any Text editor
- B.
Software development environments (Eclipse, IDE)
- C.
Graphic Editor (Photoshop)
- D.
Both A and B
Correct Answer
D. Both A and BExplanation
Both a text editor and software development environments (such as Eclipse or IDE) can be used to edit Java code. A text editor allows for manual editing of the code, while software development environments provide additional features like syntax highlighting, code completion, and debugging tools to aid in the development process. A graphic editor like Photoshop is not suitable for editing Java code, as it is primarily used for image editing. Therefore, the correct answer is "Both A and B."Rate this question:
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- 3.
Does eclipse have another compiler then default Java one?
- A.
Yes
- B.
No
Correct Answer
B. NoExplanation
Eclipse does not have another compiler other than the default Java compiler. Eclipse uses the Java Development Tools (JDT) plugin, which internally utilizes the Java compiler (javac) provided by the Java Development Kit (JDK). This means that Eclipse uses the same compiler as the default Java compiler for compiling Java code. Therefore, the correct answer is "No."Rate this question:
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- 4.
What will be output of x in following code? "class Test{ public static void main(String[] args) { int x = 1; if (x == 1) { x = x + 1} } }"
- A.
0
- B.
1
- C.
2
- D.
3
Correct Answer
C. 2Explanation
The code initializes the variable x to 1. Then, it checks if x is equal to 1. Since the condition is true, the code inside the if statement is executed. The code increments the value of x by 1. Therefore, the final value of x will be 2.Rate this question:
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- 5.
What is the difference between "int" and "INT"?
- A.
"int" and "INT" are both this same
- B.
"int" is not this same as "INT" because of java's case sensivity
- C.
"int" is not this same as "INT" because of java's case sensivity of First letter in every word
- D.
All of the above
Correct Answer
B. "int" is not this same as "INT" because of java's case sensivityExplanation
"int" and "INT" are not the same because of Java's case sensitivity. In Java, variable names are case sensitive, meaning that "int" and "INT" are considered to be two different identifiers. This means that if you declare a variable as "int", you cannot refer to it as "INT" or vice versa. Java treats them as separate entities and will throw an error if you try to use them interchangeably. Therefore, the correct answer is that "int" is not the same as "INT" because of Java's case sensitivity.Rate this question:
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- 6.
What's the extension for a compiled Java file?
- A.
.class
- B.
.java
- C.
.xml
- D.
.html
Correct Answer
A. .classExplanation
The extension for a compiled Java file is .class. This is because when a Java program is compiled, it is converted into bytecode, which is stored in a .class file. This file can then be executed by the Java Virtual Machine (JVM). The .class extension distinguishes the compiled Java file from the original .java source code file.Rate this question:
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- 7.
What's the common term for an error within a computer program's code that prevents it from functioning properly?
- A.
A glitch
- B.
A hack
- C.
A bug
- D.
All of these
Correct Answer
C. A bugExplanation
A bug is the common term for an error within a computer program's code that prevents it from functioning properly. Bugs can cause various issues such as crashes, unexpected behavior, or incorrect output. They can occur due to mistakes made by the programmer, compatibility issues, or other factors. The term "bug" originated from an incident where an actual insect caused a malfunction in a computer system.Rate this question:
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- 8.
What is a variable?
- A.
An unpredictable element in a Java program
- B.
A program that can run fast or slow depending on user input
- C.
A way to hold data temporarily in a program
- D.
An unpredictable program in a Java program
Correct Answer
C. A way to hold data temporarily in a programExplanation
A variable is a way to hold data temporarily in a program. It is used to store and manipulate values that can be changed during the execution of the program. Variables provide a means to store information that can be accessed and modified as needed, allowing for dynamic and flexible programming.Rate this question:
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- 9.
What is "String"?
- A.
Type of variable that stores text
- B.
Type of variable that stores text and numbers
- C.
Type of variable that stores numbers
- D.
All of these
Correct Answer
B. Type of variable that stores text and numbersExplanation
The correct answer is "Type of variable that stores text and numbers." This is because a string is a data type in programming that is used to represent text. It can store a combination of letters, numbers, and special characters. Therefore, it is a type of variable that can store both text and numbers.Rate this question:
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- 10.
Why do we have to use "int" and "String"?
- A.
Because on "String" we are not able to do math calculations
- B.
Because "String" is for text and numbers and "int" for numbers
- C.
Because "String" takes more memory(RAM) then "int"
- D.
All of these
Correct Answer
D. All of theseExplanation
The correct answer is All of these. We have to use "int" and "String" because "String" is used for storing text and "int" is used for storing numbers. Additionally, "String" does not support math calculations. Furthermore, it is true that "String" takes more memory (RAM) than "int".Rate this question:
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- 11.
What does SDK stand for?
- A.
Software Development Kit
- B.
Software Developer Kit
- C.
Software Dynamic Kit
- D.
Science Development Kit
Correct Answer
A. Software Development KitExplanation
An SDK stands for Software Development Kit. It is a collection of software tools, libraries, and documentation that developers use to create and maintain software applications for specific platforms or frameworks. The SDK provides a set of resources and tools that help developers streamline the development process, including sample code, debugging tools, and documentation.Rate this question:
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- 12.
Is Java short for "JavaScript"?
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Java is not short for "JavaScript". While both are programming languages, they are completely different and have distinct purposes. Java is a general-purpose programming language that is widely used for developing various applications, while JavaScript is primarily used for web development and adding interactivity to websites. Therefore, the statement "Java is short for 'JavaScript'" is false.Rate this question:
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Current Version
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Jan 04, 2024Quiz Edited by
ProProfs Editorial Team -
May 29, 2011Quiz Created by
Mafiu95