JAVA - Multiple Choice Questions (Set I)
- abhijitsathe
- Aug 14, 2025
- 9 min read
public class Test {
public static void main(String []args) {
signed int x = 10;
for (int y=0;y<5;y++, x++)
System.out.print(" " + x);
}
}
What is the result? (choose one)
A. 10 9 8 7 6 B. 9 8 7 6 5
C. Compilation fails D. An exception is thrown at run time.
A. method B. native C. subclasses D. reference E. array
A. class, if, void, long, int , continue
B. goto, instanceof, native, finally, default, throws
C. try, virtual, throw, final, volatile, transient
D. strictfp, constant, super, implements, do
E. byte, break, assert, switch, include
A. interface B. unsigned C. Float D. this E. string
A. char c1 = 064770; B. char c2 = 'face';
C. char c3 = 0xbeef ; D. char c4 = \u0022;
E. char c5 = '\iface'; F. char c6 = '\uface'
A. String s1 = null; B. String s2 = "null'; C. String s3 = (String) 'abc';
D. String s4 = (String) '\ufeed'; E. String s5 = "strings rule"
A. boolean b1 = 0; B. boolean b2 = 'false' C. boolean b3 = false
D. boolean b4 = Boolean.false(); E. boolean b5 = no;
A. -128 to 127 B. -(2^15) to (2^15)-1 C. 0 to 32767
D. Platform dependent E. 0 to 65535
A. float f1 = -343 B. float f2 = 3.14 C. float f3 = 0x12345 D. float f4 = 42e7
E. float f5 = 2001.0D; F. float f6 = 2.81F;
A. int []myScores []; B. char []myChars; C. int [6] myScores;
D. Dpg MyDogs []; E. Dog MyDogs [7];
public class Test {
public static void main(String[] args) {
int [] [] [] x = new int [3] [] [];
int i,j;
x[0] = new int[4][];
x[1] = new int[2][];
x[2] = new int[5][];
for (i=0;i<x.length;i++)
for(j=0;j<x[i].length;j++)
{
x[i][j] = new int[i+j+1];
System.out.println("size = " + x[i][j].length);
}
}
}
hoe many lines of output will be produced? (Choose one)
A. 7 B. 9 C. 11 D. 13
E. Compilation Fails F. An exception is thrown runtime.
public class Test {
public static void main(String[] args) {
byte [] [] big = new byte[7][7];
byte [] [] b = new byte[2][1];
byte b3 = 5;
byte b2 [] [] [] []= new byte [2][3][1][2];
// insert code here
}
}
Which of the following lines of code could be inserted , and still allow the code to compile?(Choose four)
A. b2[0][1] = b; B. b[0][0] = b3; C. b2[1][1][0] = b[0][0]; D.b2[1][2][0] = b;
E. b2[0][1][0][0] = b[0][0]; F. b2[0][1] = big;
A. Array a = new Array(5); B. int []a = {23,22,21,20,19} C. int []array;
D. int array[] = new int[5]; E. int a[] = new int(5); F. int [5] array;
A. int []myList = {"1" , "2" , "3" }; B. int [] myList = ( 5, 8, 2 );
C. int myList [] [] = { 4, 9, 7, 0 } D. int myList[] = { 4, 3, 7 };
E. int []myList = [3, 6, 6]; F. int myList [] = { 4; 6; 5};
A. int -> 0 B. String -> "null" C. Dog -> null
D. char -> '\u0000' E. float -> 0.0f F. boolean -> true
public class TestDogs {
public static void main(String[] args) {
Dog [][] theDogs = new Dog[3][];
System.out.println(theDogs[2][0].toString());
}
}
class Dog { }
What is the result?(Choose two)
A. null B. theDogs
C. Compilation Fails D. An exception is thrown at runtime
public class Main
{
public static void main(String[] args) {
String names[] = new String[5];
for(int x=0; x < args.length; x++)
names[x] = args[x];
System.out.println(names[2]);
}
}
and the command line invocation is
>java X a b
What is the result?
A. names B. null
C. Compilation Fails D. An Exception is thrown at runtime
public class CommandArgs
{
public static void main(String[] args) {
String s1 = args[1];
String s2 = args[2];
String s3 = args[3];
String s4 = args[4];
System.out.print(" args[2] = " + s2);
}
}
and the command line invocation,
>java CommandArgs 1 2 3 4
What is the result?
A. args[2] = 2 B. args[2] = 3 C. args[2] = null D. args[2] = 1
E. Compilation Fails F. An exception is thrown at runtime
public class CommandArgsTwo
{
public static void main(String[] argh) {
String []args;
int x;
x=argh.length;
for(int y = 1 ; y <= x; y++) {
System.out.println(" " + argh[y]);
}
}
}
and the command line invocation,
>java CommandArgsTwo 1 2 3
what is the result?
A. 0 1 2 B. 1 2 3 C. 0 0 0 D. null null null
E. Compilation Fails F. An exception is thrown at runtime
public class CommandArgsThree
{
public static void main(String[] args) {
String [][] argCopy = new String[2][2];
int x;
argCopy[0] = args;
x = argCopy[0].length;
for(int y=0; y < x ; y++) {
System.out.println(" " + argCopy[0][y]);
}
}
}
and the command-line invocation,
>java CommandArgsThree 1 2 3
What is the result?
A. 0 0 B. 1 2 C. 0 0 0 D. 1 2 3
E. Compilation Fails F. An Exception is thrown at runtime
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