- Study guides, Class notes & Summaries

A, B, D - - - - Which of the following are valid declarations? Assume .* is imported. (choose 3) A. Vector<Map> v; B. Set<String> s; C. Map<String> m; D. Map<String, String> m; A - - - - You can determine all the keys in a Map in which of the following ways? A⦁ By getting a Set object from the Map and iterating through it. B⦁ By iterating through the Iterator of the Map. C⦁ By enumerating through the Enumeration of the Map. D⦁ By getting a List from the M...

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217 pages

Written in 2023/2024

Grade A+

BESTSTUDYMATERIALS

Consider the two methods (within the same class) public static int foo(int a, String s) { s = "Yellow"; a=a+2; return a; } public static void bar() { int a=3; String s = "Blue"; a = foo(a,s); Sln("a="+a+" s="+s); } public static void main(String args[]) { bar(); } What is printed on execution of these methods? Select one: a. none of the above. b. a = 3 s = Yellow c. a = 5 s = Yellow d. a = 5 s = Blue e. a = 3 s = Blue - Answer d class Poin...

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19 pages

Written in 2025/2026

Grade A+

TestSolver9

Consider the following code. Which line will not compile? 1. Object ob = new Object(); 2. String[] stringarr = new String[50]; 3. Float floater = new Float(3.14f); 4. ob = stringarr; 5. ob = stringarr[5]; 6. floater = ob; 7. ob = floater; A. Line 6 B. Line 4 C. Line 5 D. Line 7 - Answer A. Line 6 You have been given a design document for a veterinary registration system for implementation in Java. It states: "A pet has a owner, a registration date, and a vaccination-due ...

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4 pages

Written in 2025/2026

Grade A+

TestSolver9

What is the extension name of a Java source code file? Select one: a. .obj b. .exe c. .class d. .java e. .javac. - Answer d What is the range of data type byte in Java? Select one: a. -2147483648 to b. -32768 to 32767 c. None of the mentioned d. -128 to 127 - Answer d Which statement is true regarding an object? Select one: a. An object is a reference to an attribute b. An object is what classes instantiated are from c. An object is not an instance of a class. ...

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21 pages

Written in 2025/2026

Grade A+

TestSolver9

Study the following Java code: public final class Test { void f() { S(1); } } class Test2 extends Test { void f() { S(2); } } class Program { public static void main (String[] args){ Test obj = new Test2();obj.f(); } } What is it's result? a. 2 b. 1 c. None of the others d. Compile-time error - Answer Compile-time error Study the following code: public class Test { int x= 5; int y=2; public static void main (String[] args){

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12 pages

Written in 2025/2026

Grade A+

TestSolver9

Once the function ends, the control is returned back to the ... function and execution continue from the statement immediately after the function call a. executing b. called c. declared d. calling - Answer A what number is equivalent to -4e3? a.-4000 b.-400 c..004 d..0004 e.-40 - Answer A what is the output when the sample code below executed? #include<stdio.h> int fn(int v){ if(v==1||v==0) return 1; if(v%2==0) return (fn(v/2)+2); else return(fn(v-1...

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27 pages

Written in 2025/2026

Grade A+

TestSolver9

b. text files - Answer Program information does not consist of Select one: a. Data b. text files c. Instructions c. Primary memory transfers information at lower speed than hard disks - Answer Which of these statements about primary memory is not true? Select one: a. Primary memory is also volatile b. RAM is a primary memory c. Primary memory transfers information at lower speed than hard disks d. Primary memory holds the information accessed by the CPU. a. Each progra...

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136 pages

Written in 2025/2026

Grade A+

TestSolver9

Q1. what is the output when the following program is run? class A {public int x;} public class Main {static void fun(A t) {t.x += 2;} public static void main(String args[]) {A t = new A(); t.x = 99; S(t.x + " "); t.x++; S(t.x + " "); fun(t); S(t.x); } } A. 98 99 101 B. 99 99 101 C. D. E. - Answer E a programmer need to create a logging method that can accept an arbitrary number of argument. For example, it may be called in these ways: loglt("log mess...

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77 pages

Written in 2025/2026

Grade A+

TestSolver9

PRO192 FE DETAILED EXAM STUDY QUESTIONS WITH 100% CORRECT ANSWERS 1. Which of the following statements about the reference super is TRUE ? -Select one: a. It must be the last statement of the constructor b. It must be the first statement of the constructor c. It can only be used once in a program d. It must be used every time a method from the superclass is called.T - ANSWER b 2. Which of the following is NOT TRUE ? -Select one: a. An interface is a solution for multiple inherita...

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71 pages

Written in 2025/2026

Grade A+

DrSammuel

Q1. what is the output when the following program is run? class A {public int x;} public class Main {static void fun(A t) {t.x += 2;} public static void main(String args[]) {A t = new A(); t.x = 99; S(t.x + " "); t.x++; S(t.x + " "); fun(t); S(t.x); } } A. 98 99 101 B. 99 99 101 C. D. E. - Answer E a programmer need to create a logging method that can accept an arbitrary number of argument. For example, it may be called in these ways: loglt("log mess...

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24 pages

Written in 2025/2026

Grade A+

TestSolver9

File class is under package? Select one: a. b. There is no such kind of class c. d. - Answer a The process of writing objects to a byte stream called ___________ Select one: a. Abstraction b. Serialization c. IO handling d. Deserialization - Answer b InputStream class is an ________ Select one: a. abstract class b. interface c. class d. base class - Answer a In which stream, a data unit is a physical byte. Select one: a. Character stream b. Objec...

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18 pages

Written in 2025/2026

Grade A+

TestSolver9

The default value of a static integer variable of a class in Java is, (a) 0 (b) 1 (c) Garbage value (d) Null (e) -1. - Answer A What will be printed as the output of the following program? public class testincr { public static void main(String args[]) { int i = 0; i = i++ + i; Sln("I = " +i); } } (a) I = 0 (b) I = 1 (c) I = 2 (d) I = 3 (e) Compile-time Error. - Answer B Multiple inheritance means, (a) one class inheriting from more sup...

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32 pages

Written in 2025/2026

Grade A+

TestSolver9

A, B, D - Answer Which of the following are valid declarations? Assume .* is imported. (choose 3) A. Vector<Map> v; B. Set<String> s; C. Map<String> m; D. Map<String, String> m; A - Answer You can determine all the keys in a Map in which of the following ways? A⦁ By getting a Set object from the Map and iterating through it. B⦁ By iterating through the Iterator of the Map. C⦁ By enumerating through the Enumeration of the Map. D⦁ By getting a...

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181 pages

Written in 2025/2026

Grade A+

TestSolver9

What is the output of this program? class Test { public static void main(String[] args){ HashSet set = new HashSet(); ("ABC"); ("ABC"); ("CDF"); Iterator iterator = tor(); while(Next()) { Sln(().toString()); break; } } } a. Compile error b. ABCABC CDF c. ABCCDF d. ABC - Answer d. How many finally blocks can there be in a try/catch structure? Select one: a. There can be 0 or 1 following the last catch block. b. There must be 1. c. There is no limit...

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45 pages

Written in 2025/2026

Grade A+

TestSolver9

________ allows a set of instructions to be performed until a certain condition is reached. Select one: a. None of the above b. Structure c. Loop d. Operator - Answer c. Loop The _________ function causes immediate ending of the program and control is transferred back to the operating system Select one: a. return b. exit() c. jump statement d. quit - Answer b. exit() The ____ statement can be used to terminate a case in the switch statement and / or to force the immed...

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3 pages

Written in 2025/2026

Grade A+

TestSolver9

which these is correct way of inheriting class A by class B? A. class B extends class A{} B. class B + class A{} C. class B inherits class A{} D. Class B extends A - Answer D. Class B extends A What is the output of this program? 1. class Area{ public static void main( string args []){ double r,pi,a; r = 9,8; pi = 3.14; a= pi*r*r; Sln(a); } } A.301 B.301.5656 C.301. D.301.56 - Answer B. 301.5656 Which of the following is not a valid String Constant? Select on...

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43 pages

Written in 2025/2026

Grade A+

TestSolver9