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Free Software Design and Architecture MCQs with Answers

493 Software Design and Architecture MCQs from Software Engineering, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.

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493 questions · page 2 of 25

21. The information of MIS comes from the________________?

  • A. Internal source
  • B. External source
  • C. Both internal and external source
  • D. None of the above

Explanation: A management information system combines internal data, such as sales and inventory, with external data, such as market and economic…

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Correct answer: Both internal and external source

22. Which of the following is not a technology driver for an information system ?

  • A. enterprise applications
  • B. object technologies
  • C. knowledge asset management
  • D. collaborative technologies

Explanation: Enterprise applications, object technologies, and collaborative technologies are commonly identified as technology drivers for information…

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Correct answer: knowledge asset management

23. Open database connectivity (OBDC) tools are an example of_______________?

  • A. layerware
  • B. tool kit
  • C. interfaceware
  • D. middleware

Explanation: ODBC tools provide a communication layer between applications and database systems, which is the role of middleware.

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Correct answer: middleware

24. A specification of how the user moves from window to window, interacting with the application programs to perform useful work is called_______________?

  • A. interface specifications
  • B. software specifications
  • C. user dialog
  • D. prototyping specifications

Explanation: A user dialog specifies the sequence in which users move between screens or windows and interact with application functions.

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Correct answer: user dialog

25. What will the output of the following program? public class Test{ public static void main(String args[]){float f = (1 / 4) * 10; int i = Math.round(f); System.out.println(i); } } ?

  • A. 0
  • B. 1
  • C. 2
  • D. 3

Explanation: The expression `1 / 4` uses integer operands, so integer division produces 0 before multiplication by 10.

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Correct answer: 0

26. Process of creating exact copy of the existing object is called_______________?

  • A. overloading
  • B. overriding
  • C. cloning
  • D. coping

Explanation: Cloning means creating a copy of an existing object, usually through Java's `clone()` mechanism or a similar copying method.

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Correct answer: cloning

27. If method have same name as class name and method don't have any return type then it is known as______________?

  • A. Constructor
  • B. Destructors
  • C. Variable
  • D. Object

Explanation: A constructor has the same name as its class and declares no return type, not even `void`; it initializes a newly created object.

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Correct answer: Constructor

28. Which metrhods are utilized to control the access to an object in multi threaded programming ?

  • A. Synchronized methods
  • B. Asynchronized methods
  • C. Serialized methods
  • D. None of above

Explanation: A synchronized method permits only one thread at a time to execute the protected method for the relevant object lock.

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Correct answer: Synchronized methods

29. The smallest integer type is _____________ and its size is____________ bits?

  • A. short, 8
  • B. byte, 8
  • C. short, 16
  • D. short, 16

Explanation: In Java, `byte` is the smallest signed integer primitive type and occupies 8 bits. `short` is larger, occupying 16 bits.

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Correct answer: byte, 8

30. Which keyword is used while using interface________________?

  • A. throw
  • B. throws
  • C. extend
  • D. implements

Explanation: A class uses `implements` to provide the methods required by an interface, as in `class A implements I`.

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Correct answer: implements

31. Which of the following statements about arrays is syntactically wrong ?

  • A. arrayName[] p = new arrayName[5];
  • B. arrayName p[][] = new arrayName[2][];
  • C. arrayName[] p [];
  • D. arrayName p[5];

Explanation: Java allows the brackets to appear after the type or variable, and an incomplete second dimension is valid in a declaration.

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Correct answer: arrayName p[5];

32. Smallest individual unit in java program is known as____________________?

  • A. token
  • B. string
  • C. literal
  • D. operator

Explanation: A token is the smallest meaningful lexical unit in a Java program, such as a keyword, identifier, operator, or literal.

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Correct answer: token

33. Which command is used for interpretation of java program_______________?

  • A. Java
  • B. javap
  • C. javac
  • D. none of above

Explanation: The java command launches the JVM and runs compiled Java bytecode, while javac compiles source code and javap disassembles class files.

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Correct answer: Java

34. Which type of inheritance is not supported by java_____________?

  • A. Single
  • B. Mulilevel
  • C. Hirarchical
  • D. Multiple

Explanation: Java supports single, multilevel, and hierarchical inheritance through classes, but it does not allow a class to extend multiple classes.

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Correct answer: Multiple

35. Thread class is available in________________?

  • A. java.lang package
  • B. java.util package
  • C. java.awt package
  • D. java.io packageDevelopment Tools

Explanation: Thread is part of java.lang, which is imported automatically into every Java source file.

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Correct answer: java.lang package

36. Methods that have same name, but different Parameter list and different definition known as_________________?

  • A. Overriding
  • B. Overloading
  • C. Constructor
  • D. none of these

Explanation: Overloading means defining methods with the same name but different parameter lists, allowing different inputs to select different…

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Correct answer: Overloading

37. How many primitive data types are there in Java ?

  • A. 5
  • B. 6
  • C. 7
  • D. 8

Explanation: Java has eight primitive types: byte, short, int, long, float, double, char, and boolean.

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Correct answer: 8

38. What will be output of following program? public class Test{public static void main(String[] args){byte b=127; b++; b++; System.out.println(b); } } ?

  • A. 127
  • B. -127
  • C. 129
  • D. -129

Explanation: A byte can hold values from -128 to 127, so incrementing 127 wraps to -128 and the second increment produces -127.

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Correct answer: -127

39. Size of float and double in Java is________________?

  • A. 32 and 64
  • B. 64 and 64
  • C. 32 and 32
  • D. 64 and 32

Explanation: Java specifies float as a 32-bit single-precision type and double as a 64-bit double-precision type.

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Correct answer: 32 and 64

40. All collection classes are available in _________________?

  • A. java.util package
  • B. java.io package
  • C. java.lang package
  • D. java.awt package

Explanation: Java's standard collection interfaces and implementations, such as List, Set, Map, ArrayList, and HashMap, are primarily provided in…

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Correct answer: java.util package
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